1
DEMO MANUAL DC2732A
Rev. 0
DESCRIPTION
LTC2949
Battery Stack Monitor
The DC2732A demonstrates a high voltage battery pack
monitor based on the LTC
®
2949. The LTC2949 is a high
precision current, voltage, temperature, charge and
energy meter for electrical and hybrid vehicles and other
isolated current sense applications. It infers charge and
energy flowing in and out of the battery pack by simulta-
neously monitoring the voltage across two sense resis-
tors and the battery pack voltage.
Due to its compatible protocol, the LTC2949 can share the
same communication bus with ADI battery stack monitors
that contain the isoSPI™ interface.
The LTC2949 is typically powered from an isolated sup-
ply and directly connected to the battery stack on the low
or high side depending on the shunt position. Resistive
high voltage dividers provide connections to high voltage
terminals that need to be supervised.
Design files for this circuit board are available.
All registered trademarks and trademarks are the property of their respective owners. Protected
by U.S. patents, including Patents 8908779, 9182428, 92701.
BOARD PHOTO
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DEMO MANUAL DC2732A
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TABLE OF CONTENTS
Description.................................................. 1
Board Photo ................................................. 1
Performance Summary ................................... 3
Hardware Setup ............................................ 4
Hardware Description ..................................... 5
Jumper Functions ..................................................... 5
Connector Functions .................................................6
Connector J3 Pin Assignment...................................7
Pin Functions ............................................................ 7
Solder Jumpers and Other Functions........................8
Hardware Setup Examples ............................... 9
Option 1: Nonisolated SPI Setup ............................... 9
Option 2: Isolated isoSPI DC2617 Setup ................. 10
Option 3: Isolated isoSPI DC1941 Setup ................. 11
Option 4: Isolated isoSPI DC2792 Setup ................. 12
Option 5: Isolated Reversible isoSPI DC2792,
DC2350 Setup ........................................................ 13
Connecting a High Voltage Battery ......................... 14
Software Setup Overview ................................15
Arduino IDE Setup .................................................. 15
LTC2949 Windows GUI Usage ..........................18
LTC2949 GUI Setup ................................................ 18
Operation Control ................................................... 19
Multimeters ............................................................21
Plots/Data Collection ..............................................22
Plot Zoom Fit ..........................................................23
Plot Pan, Zoom, Labels ...........................................23
Change Thresholds On-The-Fly ............................... 24
Plot Trackers ...........................................................25
Export Plot Data .....................................................25
Plot Time Axis ........................................................25
Register Map ..........................................................25
Edit Register Values ................................................ 25
Register Context Menu ...........................................26
Display Format Selection ........................................26
Register Map Tooltips ............................................. 28
Register Details ......................................................28
Auto Read Menu .....................................................28
Tools Menu .............................................................29
Basic Operation Example ........................................ 29
Appendix A: Usage of SPI Isolator Instead of isoSPI ....32
Appendix B: CAN Based Evaluation ....................33
Hardware Requirements .........................................33
Software Requirements ..........................................33
Setup the Hardware ................................................33
DC2732A_CAN: LTC2949 CAN Firmware ...............34
CAN Messages Overview ........................................ 34
Basic Operation Examples ......................................40
Current, Power, BAT (100ms) .................................40
I1, P1, BAT (100ms), I2fast, BATFast (1ms to 2ms) ...... 40
I1, P1, BAT (100ms), I2fast, BATFast (average 10ms) ...41
Additional Operation Examples ............................... 43
Usage of RAWRW ...................................................43
Fast Measurement ..................................................46
Serial Monitor via Linduino’s USB Port ...................49
Convert .DBF to .DBC File ....................................... 51
Resistive Divider Equation ......................................52
Definitions ..............................................................52
Appendix C: Isolation Measurement with LTC2949 ...52
Case I: Switch M1 Open ..........................................53
Case II: Switch M1 Closed ......................................53
Combine Equations of Both Cases ..........................53
Calculate YISO– from Case II: .................................. 54
Simulation with Switch Leakage Error ....................54
Appendix D: Measure Hall Sensor with
DC2732A_Basic ...........................................54
Appendix E: Synchronous Measurements with
Cell Monitors and LTC2949 .............................56
Appendix F: GUI Troubleshooting & Linduino
Programming ..............................................62
Appendix G: Log Measurements with Tera Term .....66
Log Measurement Data from DC2732A_BASIC to
TEXT/.CSV – File .....................................................66
Appendix H: LTC2949.CPP/.H Basic Library Functions .. 69
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DEMO MANUAL DC2732A
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SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Isolated Supply (Flyback LT8301)
|VGND-LGND| Isolation Working Voltage 800 V
VCC Input Supply Voltage l5.0 12.0 V
5.0 32.0 V
IVCC Input Supply Current Sleep (Note 1)
Standby (Note 1)
10
25
mA
mA
VUVLO+Under Voltage Lockout Rising (Note 2) 4.2 V
VUVLO–Under Voltage Lockout Falling (Note 2) 3.1 V
VOUT Output Voltage JP11 = 5.3
JP11 = 12.4
JP11 = 9.0
5.3
12.4
9.0
V
V
V
Nonisolated ADVCC Supply, VCC = 0V/JP9 = Dis
ADVCC Input Supply Voltage l4.5 14.5 V
IADVCC Input Supply Current Sleep (Note 1), ADVCC = 12V
Standby (Note 1), ADVCC = 12V
10
25
mA
mA
isoSPI Interface J1, J2, ISO+/ISO–
|VGND-LGND| Isolation Working Voltage 800 V
RTERM Differential Bus Termination Resistance 100 Ω
Operation Mode Indication LEDs
D2 Sleep LED LTC2949 Core Sleep Red
D3 Active LED LTC2949 Core Standby/Measure Green
NTC Temperature Sensor NTCG164KF104FT/TDK
R1 Shunt Temperature Resistor Resistance at 25°C 100k Ω
R2 Board Temperature Resistor
A, B, C Steinhart-Hart Parameters
1
T
=A+B•InRNTC +C•(InRNTC)3
A = 9.85013754e-4
B = 1.95569870e-4
C = 7.69918797e-8
Current Sense Resistor (Note 3)
Manufacturer: Isabellenhuette
Tolerance of Nominal Resistance: 5%,
Temperature Range of Given TC: 20°C–60°C
Manufacturer Part Number
BAS-M-R0001-R-5.0 DC2732A-B: 50e–6Ω, RTHI = 1.5K/W, TC = 100 ppm/K, P140°C = 20W (I140°C ≈ 630A)
BAS-M-R00005-AEU-5.0 DC2732A-A: 100e–6Ω, RTHI = 2.0K/W, TC = 50 ppm/K, P140°C = 15W (I140°C ≈ 380A)
BAS-M-R0002-R-5.0 DC2732A-C: 200e–6Ω, RTHI = 3.0K/W, TC = 50 ppm/K, P140°C = 10W (I140°C ≈ 220A)
Note 1: The sleep current does not reflect the sleep current of LTC2949, which is in the µA range. The DC2732A uses the LT8301 isolated flyback
converter, that requires a minimum load current for stable regulation. To maintain this minimum load and to have some visual feedback on operation
mode of LTC2949, the DC2732A has a red LED that indicates sleep and a green LED that indicates standby/measure state.
Note 2: The undervoltage lockout is calculated according to LT8301’s data sheet and the nominal resistance values of R16 (R1), R23 (R2).
Note 3: All given specifications of the current sense resistor are from Isabellenhuette’s data sheet of the BAS series precision and power resistors.
Note 4: When evaluating the current measurement accuracy of the DC2732A the shunt resistance must be calibrated. Also the remaining temperature
dependency of the resistance (TC) can be calibrated. To allow precise temperature measurement of the current sense resistor, the DC2732A contains an
NTC (R1) placed close to the shunt with good thermal connection (also electrically connected to one pad of the shunt).
PERFORMANCE SUMMARY
The l denotes the specifications which apply over the full operating temperature
range (–40°C to 125°C), otherwise specifications are at TA = 25°C. The test conditions are VCC = 12.0V, JP11 set to 12.4V operation,
unless otherwise noted. JP4–JP6 set to isoSPI, unless otherwise noted.
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DEMO MANUAL DC2732A
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HARDWARE SETUP
VIN(UVLO+)=1.242V •(R1+R2)
R2 +2.5µA •R
1
VIN(UVLO−)=1.228V •(R1+R2)
R2
R1 = 430e3; R2 = 270e3; UVLOP = 1.242 • (R1 + R2)/R2 + 2.5E-06 • R1;
UVLON = 1.228 • (R1 + R2)/R2; UVLON, UVLOP (3.18, 4.30)
Figure1. Undervoltage Lockout Calculation for LT8301 According to the Schematic of DC2732A
The DC2732A can be setup for different applications.
The power supply and communication interface can be
a nonisolated connection via J4 or the individual turrets
IOVCC, MISO, MOSI, SCK, CS, ADVCC, GND. An isolated
connection is possible using the onboard flyback con-
verter LT8301 sourced by VCC, LGND and using the isoSPI
communication via J1, J2 or iso+, iso– test points. If not
needed, the onboard power supply can be left unpowered,
or be disabled by connecting the enable signal to LGND
(put jumper JP9 to DIS). If not using the onboard power
supply, any external (also isolated) power supply can be
connected to ADVCC and GND (e.g., Analog Devices inte-
grated isolated DC-to-DC converters – isoPower).
The communication mode (SPI or isoSPI) must be set
using jumpers JP3–JP6. In case J4 is directly connected
to a Linduino
®
, it provides 7V and JP3–JP6 must be set
to SPI operation.
The Hardware Description section gives more details
about different hardware setup options. In most cases,
the DC2732A is operated together with a DC2026, which
is referred to as a Linduino.
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DEMO MANUAL DC2732A
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JUMPER FUNCTIONS
JUMPER
DEFAULT
NAME DESCRIPTION
JP1 On isoSPI Term Enable/disable 100e isoSPI bus termination. If LTC2949 is the only device on the isoSPI bus or
connected on top of a cell monitor isoSPI daisy chain, the termination must be enabled. If LTC2949 is
connected in parallel to a daisy chain (LTC2949 is fed into the input of a daisy chain via J1, J2) of cell
monitors, the termination must be disabled.
JP2 EN Auto Sleep Enable/disable automatic entering of sleep state after power-up. The LTC2949 automatically returns
to sleep state if no wake-up confirmation command is received within 1 second after entering standby
state, after power-up. Wake-up confirmation can be either writing 0x00 to register 0x70 or starting of
a measurement. LTC2949 will not go automatically to sleep if SDA is pulled low (JP2 at position DIS)
during power-up. As SDA is also used for the optional external EEPROM, it must be released from GND
to allow communication to the EEPROM. In most applications, the Auto Sleep will stay enabled and the
muster will send the wake-up acknowledge. Still, for debugging purposes, this jumper may be set to DIS
to force LTC2949 to stay in standby mode.
JP3–JP6 isoSPI SPI/isoSPI Select between nonisolated SPI or isolated isoSPI communication mode. All jumpers must be either
set to the left (SPI) or the right (isoSPI) position. In case the QuikEval™ connector J4 is connected to a
Linduino, the interface must be set to SPI.
JP7, JP8 Low High/
Low Side
Select between high or low side current sensing. To avoid the sense resistor being floating, it can be
tight to either LTC2949’s GND (low side sensing) or to LTC2949’s A/DVCC (high side sensing). It is also
possible to remove both jumpers (or set JP7 to low and JP8 to high) if the shunt is applied somewhere
between LTC2949’s supply rails by external connections. See following sections for example setups.
JP9 EN PWR Enable/disable the onboard flyback converter LT8301. The isolated onboard supply can also be
disabled by disconnecting VCC, LGND or setting VCC, LGND to less than 3V (see VUVLO–).
JP10 7V ADVCC Enable (7V)/disable (off) connection of LTC2949’s A/DVCC supply input to V+ of J4. If Linduino is
connected to J4, V+ is supplied with 7V from a SMPS with post LDO on the Linduino. The Linduino
allows to override this voltage up to LTC2949’s max. operating voltage of 14.5V via turrets ADVCC and
GND. If JP10 is set to off, it is also possible to apply any voltage between 4.5V and 14.5V to ADVCC and
still use the Linduino connected via J4.
JP11 5.3V VOUT Onboard isolated flyback converter LT8301 output voltage selector. Select one of three (5.3V, 9.0V,
12.4V) pre-configured output voltages for the flyback converter. Higher supply voltages are useful to
take advantage of LTC2949’s GPOs being able to drive the output to one of LTC2949’s supply rails. This
allows for example to ensure sufficient gate-source voltage when using MOSFETs to switch high voltage
resistive dividers connected to LTC2949’s voltage inputs. See Hardware Setup Examples section and
LTC2949 data sheet for more details.
HARDWARE DESCRIPTION
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DEMO MANUAL DC2732A
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CONNECTOR FUNCTIONS
CONNECTOR NAME DESCRIPTION
J1, J2 SPI Master, Cell
Monitors
isoSPI connectors. Pin 1 (iso–) and Pin 2 (iso+) of both connectors are connected in parallel. Thus, any of the two
connectors can be used as the interface to the isoSPI master. For clarity, they are still named differently to indicate
one connector can be used to interface to the isoSPI master and one to a cell monitor. Having two connectors
allows the DC2732A to be easily inserted into the isoSPI bus between a LTC6820 and a LTC681x/ADBMS681x cell
monitor by using two standard Ethernet cables. Physically the LTC2949 is then connected in parallel to this isoSPI
bus and the isoSPI termination resistor (see JP1) must be disabled.
J3 EXT General purpose I/O connector. Allows connection to LTC2949’s analog inputs V2 to V7, VBATP, VBATM, general
purpose I/Os V8 to V10, reference output VREF and supply voltage A/DVCC. See Pin Functions or schematic for
pinassignment.
J4 QuikEval Linduino QuikEval connector. Connect the 14-pin flat ribbon cable between this connector and Linduino for
nonisolated SPI operation. Keep in mind that the Linduino has an isolated USB interface, meaning also in this setup
the DC2732A is isolated from the PCs USB port.
Also note, that the Linduino’s default VCCIO output voltage setting (Pin 2) is 5V, whereas LTC2949’s max. IOVCC
operating voltage is 4.5V. The absolute maximum voltage for IOVCC of LTC2949 is 5V plus some safety margin
Analog Devices puts on such parameters, thus no damage will happen even with Linduino’s VCCIO tolerances. Still,
for operation within LTC2949’s specifications, it is recommended to set the jumper JP3 of the Linduino to any of
EXT, 2.5V or 3.3V. It is also allowed to remove the jumper which sets VCCIO to 1.8V. In case EXT is selected, an
external voltage of 1.8V to 4.5V must be applied to JP1 of Linduino or to test point IOVCC of DC2732A.
J5 I2CI2C test points. Allows to connect a scope or 2nd I2C master to the onboard I2C EEPROM for debugging purposes.
J6 EXTCLK External clock interface. In case the internal oscillator and the optional onboard 4MHz crystal is not used, an
external oscillator between 10kHz and 25MHz can be connected to those test points.
J7 NTC (V1) External NTC connection. The DC2732A, as default, has an onboard NTC that is connected to V1 and to IM
(negative shunt terminal). This allows a good thermal (via big copper plane) connection to the shunt for sensing its
temperature. As the NTC is put into a voltage divider between VREF and GND, it requires the shunt to be configured
for low side sensing (IM connected to GND via JP8). To allow the temperature measurement of the shunt also in
high side current sensing applications, it is possible to remove the onboard NTC R1 and connect an external, wired
NTC to J7. For tight thermal coupling the external NTC can then be clued to the shunt (electrical isolated).
If shunt temperature measurement is not required in high side sensing applications, it is not necessary to remove
the onboard NTC. Still, if leaving the NTC R1 populated, the analog input V1 can’t be used for other purposes. To
allow usage of V1 for other analog input signals, the NTC R1 and the reference resistor R3 must be removed.
J8 GPO Isolated digital interface to LTC2949’s alert signals (heart-beat signals DO4, DO5). If enabled, the heart beat
signals of LTC2949 toggle at 400kHz at normal operation. They are transferred via capacitors and the dual isolation
transformer T4 over the isolation barrier, rectified and buffered via the dual comparator LT6700. The open-drain
output signals are driven to VCC by weak 150k pull-up resistors, as long the heart beat signals are toggling. The
weak pull-up resistors allow to connect low-ohmic (e.g., 3.3k) external pull-up signals to a different I/O voltage if
required. In case of an alert (e.g., over current), the associated heart beat signals stop, and the comparator’s output
is pulled low indicating the alert on the isolated, low voltage side. See LTC2949’s data sheet for details on the heart
beat signals.
J9 Heart Beat Test points to the heart beat signals after the isolation transformer and before the rectifier. For debugging
purposesonly.
J8, J9 In addition to the alert and heart-beat signals, those connectors also allow access to the supply voltage input VCC
and LGND of the onboard flyback converter.
HARDWARE DESCRIPTION
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DEMO MANUAL DC2732A
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CONNECTOR J3 PIN ASSIGNMENT
PIN NAME DESCRIPTION PIN NAME DESCRIPTION
15 GND LTC2949’s GND 16 VREF LTC2949’s 3V Reference Voltage Output
13 VBATM Negative BAT Input 14 VBATP Positive BAT Input
11 NTC2+V2 Analog Input, a 100k NTC/RREF is Connected Onboard 12 V3 Analog Input V3
9 V4 Analog Input V4 10 V5 Analog Input V5
7 V6 Analog Input V6 8 V7 Analog Input V7
5 V8_DO1 Analog Input V8/Digital Output DO3 (Note 4) 6 V9_DO2 Analog Input V9/Digital Output DO2 (Note 4)
3 V10_DO3 Analog Input V10/Digital Output DO3 (Note 4) 4 GND LTC2949’s GND
1 GND LTC2949’s GND 2 ADVCC LTC2949’s ADVCC Supply Voltage
Note 1. All dual purpose pins (GPIOs) do not have their filter capacitor populated on the PCB. This was done to not interfere with the digital output function
(including the 400kHz toggling mode) of those pins. It is recommended to assemble an input filter capacitor (C14, C19, C20) to the GPIOs that are used in
analog input only mode for best noise filter performance.
PIN FUNCTIONS
PIN/
TURRET NAME DESCRIPTION
PIN/
TURRET NAME DESCRIPTION
E1 BATP See J3 VBATP E10 VREF See J3 VREF
E2 BATM See J3 VBATM E11 ADVCC See J3 VBATP
E3 V3 See J3 V3 E12, E13 GND See J3 VBATP
E4 V4 See J3 V4 E21 MISO LTC2949’s SPI Interface (When Configured to
SPI Mode, See JP3–JP6)
E5 V5 See J3 V5 E22 MOSI
E6 V6 See J3 V6 E23 SCK
E7 V7 See J3 V7 E24 CS
E8 V8 See J3 V8_DO1
E9 D2 See J3 V9_DO2
E18 D4 Isolated, Rectified and Buffered Heart Bit Signal
V11_DO4
E17 HB4 Isolated Heart Bit Signal V11_DO4
E19 D5 Isolated, Rectified and Buffered Heart Bit Signal
V12_DO5 (Over Current Comparator Output)
E20 HB5 Isolated Heart Bit Signal V12_DO5 (Over
Current Comparator Output)
E14, E15 LGND Negative Supply Input to Onboard Isolated Flyback
Converter LT8301
E16 VCC Positive Supply Input to Onboard Isolated
Flyback Converter LT8301
Note: = Signals on the low voltage side, isolated from LTC2949
HARDWARE DESCRIPTION
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DEMO MANUAL DC2732A
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SOLDER JUMPERS AND OTHER FUNCTIONS
REF PCB PICTURE DESCRIPTION
SJ1–SJ4 Normally closed solder jumpers to allow disconnection of onboard
shunt RSNS1. Those are small PCB footprints that can be cut with
a small knife. SJ1, SJ2 allow to disconnect I2P, I2M from the shunt.
SJ3, SJ4 allow to disconnect I1P, I1M from the shunt. Once a channel
is disconnected, it is possible to connect an external shunt to the test
points right below the solder jumpers.
After being cut, it is still possible to close them again by applying
some solder.
SJ5, SJ6 Normally closed solder jumpers to allow disconnection of onboard
4MHz crystal.
BYP2, IOVCC Test points to LTC2949’s IOVCC supply input and BYP2 3.3V supply
output. The BYP2 supply output can be used to load external circuits
with up to 10mA, for example to supply an external SPI isolator
like ADuM141E or ADuM4154. In such applications IOVCC can be
connected to BYP2 via those test points. See also Appendix A: Usage
of SPI Isolator Instead of isoSPI for more details.
HARDWARE DESCRIPTION
Figure3. Solder Jumpers SJ1–SJ4, Allow Separation of the Two Current Channels
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DEMO MANUAL DC2732A
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The DC2732A demo board can be operated in four differ-
ent setup options.
1. Nonisolated SPI interface with DC2026 (Linduino)
Options 2 thru 5 are isolated.
2. isoSPI interface with DC2617 (CAN to isoSPI shield)
plugged on top of DC2026 (Linduino)
3. isoSPI interface with DC1941 (LTC6820 SPI to isoSPI
bridge) connected to DC2026 (Linduino)
4. isoSPI interface with DC2792 (dual LTC6820 SPI to
isoSPI bridge) connected to DC2026 (Linduino)
5. isoSPI interface parallel to a reversible daisy chain of
cell monitors (as above with DC2792, DC2026)
For option 1, the LTC2949 is supplied with 7V by
Linduino. In all other cases a 5V to 12V (or up to 32V,
HARDWARE SETUP EXAMPLES
see performance summary) supply needs to be connected
to turrets LGND and VCC on the lower left side of thedemo
board.
For option 1, the LTC2949 is galvanically connected to
the Linduino. Still, the Linduino has a galvanic isolation
to its USB port. For the other two options, the commu-
nication and supply to LTC2949 is isolated by an isoSPI
transformer and flyback converter.
Make sure to set the SPI/isoSPI selection jumpers J3–J6
to the correct position depending on the chosen option
(SPI for option 1, isoSPI for all other options).
In all setups it is possible to operate LTC2949 together
with cell monitors ADBMS68xx/LTC681X. As the DC2732A
has two RJ45 isoSPI connectors, this is especially easy
when operating in isoSPI mode, as shown in option 5.
Figure4 thru Figure6 show how DC2732A is configured
and connected with above mentioned demo circuits.
OPTION 1: NONISOLATED SPI SETUP
Figure4. Nonisolated SPI Communication and Supply via Linduino (Linduino’s USB Port is Still Isolated). Supply via Turrets VCC,
LGND is Not Necessary in This Setup; This is Also the Recommended Initial Setup when Using the GUI Software, the First Time as It
Allows Easy GUI Installation via QuikEval; After the GUI is Installed Any Other Setup Can Also Be Used
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DEMO MANUAL DC2732A
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HARDWARE SETUP EXAMPLES
OPTION 2: ISOLATED ISOSPI DC2617 SETUP
Figure5. Isolated isoSPI Communication via LTC6820 on DC2617, Isolated Supply via Turrets VCC, LGND. Optional CAN Interface
via DC2617; The Linduino Sketchbook for LTC2949/DC2732A Also Contains a Software Example, that Allows Measurements Done by
LTC2949 to Be Controlled and Communicated Into a CAN Environment; See Appendix A: Usage of SPI Isolator Instead of isoSPI
15
DEMO MANUAL DC2732A
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CONNECTING A HIGH VOLTAGE BATTERY
Figure9. Connecting a High Voltage Battery with Resistive Divider to DC2732 for Low Side Current Sense Operation
Figure10. Connecting a High Voltage Battery with Resistive Divider to DC2732 for Low Side Current Sense Operation with Chassis-
GND Isolation Measurement; See Appendix C: Isolation Measurement With LTC2949 for Operation and Calculation Details
HARDWARE SETUP EXAMPLES
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DEMO MANUAL DC2732A
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The DC2732A can be controlled by the Linduino One
(DC2026) board. The Linduino is an Arduino compatible
platform with example code that will demonstrate how to
control multicell battery stack monitor ICs and the stack
monitor LTC2949. Compared to most Arduino compatible
microcontroller boards, the Linduino offers conveniences
such as an isolated USB connection to the PC, built-in SPI
MISO line pull-up to properly interface with LTC2949’s
open-drain SDO, and an easy ribbon cable connection
for SPI communication through the DC2732A 14-pin
“QuikEval” J4 connector. Please see the Linduino web
page for more details.
Besides using the Linduino as a host controller, the
DC2732A can also operate with any other host controller,
that offers a SPI interface. Linux based evaluation, for
example using a Raspberry Pi, is also supported; please
contact Analog Devices for details.
SOFTWARE SETUP OVERVIEW
ARDUINO IDE SETUP
1. Download and install the Arduino IDE to the PC.
Detailed instructions can be found under the
quickstarttab.
2. Set the Arduino IDE to open LTC2949 Sketchbooks.
From within the Arduino IDE, click on File menu
select Preferences. Then under Sketchbook location:
select Browse and locate the path to the extracted
LinduinoSketchbook2949.zip file that was provided
by ADI.
a. If there is already a BMS Sketchbook, it can be
extracted into the same folder as the bmsSketch-
bookBeta.zip.
b. Also, if there is already a local copy of
LinduinoScketchbook2949.zip, it can be extracted
into the LTSketchbook folder.
Figure11. Arduino IDE Preferences, Sketchbook Location
Figure12. Arduino IDE, COM-Port Setting
3. Close then re-open the Arduino IDE to enable the use
of the Sketchbook Location that was previously set.
4. Select the correct COM port to allow communication
to Linduino through USB. Under the Tools menu,
select Port → Select the highest number COMxx with
the “√" check mark symbol. There may be more than
one option; Linduino is usually the highest COM port
number. The PC screenshots used in this example
show the Linduino connected to COM6. To identify
the right COM port, unplug the USB cable and check
which port disappears from the Tools/Port menu.
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DEMO MANUAL DC2732A
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SOFTWARE SETUP OVERVIEW
5. Select the correct Arduino compatible microcontroller board. Under the Tools menu, select Board → Arduino/
Genuino Uno with the “•” black dot symbol.
Figure13. Arduino IDE, Board Setting
6. Open one of the programs, called “Sketches,” associated with the DC2732A. In this example DC2732A_BASIC
Sketch will be opened. Under the File menu, select Sketchbook → Part Number → 2000 → 2900 → 2949 →
DC2732A_BASIC.
Figure14. Arduino IDE, Sketchbooks for LTC2949/DC2732A
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DEMO MANUAL DC2732A
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SOFTWARE SETUP OVERVIEW
7. Upload the DC2732A_BASIC Sketch onto the Linduino by clicking on the Upload button on the top left corner. When
this process is completed there will be a “Done Uploading” message on the bottom left corner.
Figure15. Arduino IDE, Sketchbook Upload
Figure16. Arduino IDE, Serial Monitor
8. Open the Arduino Serial Monitor tool. Click on the Serial Monitor button on the top right corner then the Serial
Monitor window will open and show on the top left corner the COMxx used.
9. Configure the Serial Monitor to allow communication to the Linduino through USB. On the bottom of the Serial
Monitor window, set the following starting from bottom left to bottom right.
a. Enable “Autoscroll”
b. Select Both NL and CR on the left dropdown menu.
c. Select 1000000 baud on the right dropdown menu (see Serial.begin within DC2732A_BASIC.ino for the
baud-ratesetting).
Note: In case Arduino DUE is used, the max. supported baud rate is 250000.
d. As shown in Figure17, when configured correctly the DC2732A_BASIC Sketch will start to output measurement data.
Figure17. Arduino IDE, Serial Monitor Output of DC2732A_BASIC Sketch
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DEMO MANUAL DC2732A
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SOFTWARE SETUP OVERVIEW
LTC2949 GUI SETUP
Various features of the DC2732A can be demonstrated
by using Analog Devices’ QuikEval Software. QuikEval is
a USB-based product demonstration and data acquisi-
tion software meant to be used in conjunction with the
Linduino programmed with the DC590B Sketch (factory
default) that connects to individual daughter cards for
specific Analog Devices products.
Connect the Linduino to a PC using the USB cable pro-
vided with the Linduino. Now, connect the Linduino to
the DC2732A configured to SPI mode, see Hardware
Setupsection.
Once setup is complete (also wait for Windows installing
the drivers after Linduino is connected the first time to
The DC2732A software user interface was designed to
allow users to quickly evaluate the LTC2949. The user has
the ability to plot/monitor voltage, current, power, charge
and energy, and fully access LTC2949’s register map
to make any configuration. Also, operation of LTC2949
together with ADBMS68xx/LTC681x cell monitors e.g., to
do synchronous measurements of cell voltage and battery
stack current is supported.
Once the graphical user interface (GUI) is started, the user
can connect to the LTC2949 via Linduino and the GUI will
initially read out all the register values from the LTC2949.
Figure18. GUI: Connect Device
the PC), run the QuikEval Software. QuikEval should auto-
detect the DC2732A and check if the LTC2949 GUI is already
installed. QuikEval will automatically download and install
the GUI if necessary and launch it. Once the LTC2949 GUI
is installed, QuikEval is not necessary anymore and the
GUI can be opened directly from the Windows Start Menu
(named LTC2949). In case the DC2732A is operated in
isoSPI mode in which the Linduino is not connected via
the 14-pin ribbon cable directly to DC2732A but to some
isoSPI demo board (DC1941, DC2792, DC2617), QuikEval
is unable to detect the DC2732A as it will only read the
identification EEPROM on the isoSPI demo board and
thus try to launch other GUIs that are not compatible with
LTC2949. Still, if the LTC2949 is opened directly from the
Windows start menu it will operate normally (QuikEval
should be closed before opening the LTC2949GUI).
LTC2949 WINDOWS GUI USAGE
After the connection is established, most typical basic
operation steps are:
1. Starting continuous conversion.
2. Enabling Register Auto Read (data transfer from
device to PC).
3. Clearing device’s accumulators and trackers and
GUI’splots.
The LTC2949 GUI is split into several sub-windows that
can be rearranged and even detached from the main win-
dow by dragging the title, moving around and dropping to
a new position. Some sub-windows are hidden and can be
shown by enabling them in the View menu. All this allows
20
DEMO MANUAL DC2732A
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the GUI to be adjusted to any screen size and to show only the information that is of interest for a given application
without overwhelming the user with the large feature-set of the LTC2949.
Any custom GUI layout may be set as the default (View
→ Set Default Layout), stored to a specific file (View →
Save Layout...) or reloaded (View → Get Default Layout or
Load Layout...). The default layout will always be reloaded
on start-up. The GUI may be reset to the factory default
layout by View → Reset Default Layout.
OPERATION CONTROL
The Operation Control functions are:
1. Connect/Disconnect Device via USB (Linduino/
DC2026).
2. Enable/Disable Continuous measurement.
3. Make Slow Channel Single conversion.
4. Shutdown Device.
5. Reset Device.
Figure19. GUI: Main Window
6. Time Base Control to set internal or external clock
frequency including calculation of PRE/DIV values for
a given clock (see also Tools Menu section).
7. Enable/Disable Register Auto Read. If enabled data
is automatically transferred from device to PC every
100ms (default), see Auto Read Menu section.
8. Manually Update All Registers (manually transfer all
data from device to PC).
9. Clear Accumulator and Tracking registers.
10. Clear Accumulator and Tracking registers and reset
all data in all plot windows.
11. Update Configuration from 2nd memory page
(ADJUPD which is necessary when changing gain
correction factors, ADC configuration etc.).
12. Configure ADCs (requires ADJUPD to become
effective).
LTC2949 WINDOWS GUI USAGE
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DEMO MANUAL DC2732A
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Figure20. Operation Control Functions
13. Configure Fast Channel (only possible when in Continuous mode).
14. Configure AUX multiplexer.
15. Set NTC parameters (requires ADJUPD to become effective).
16. Configure sense resistor’s nominal value and ratio in case two separate sense resistors are used (only change of
ratio requires ADJUPD to become effective).
LTC2949 WINDOWS GUI USAGE
22
DEMO MANUAL DC2732A
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In case the GUI is not connected to the device, all con-
trols but the green “Connect Device via USB” button are
disabled. Hit the green button to establish the connec-
tion. A window is shown allowing to specify the COM
port of the Linduino, the used chip select (CS) line and
the optional configuration of attached cell monitors. In
case the dual LTC6820 demo board (DC2792) is used,
the CS configuration can be set to Aux or Main to allow
usage of one of the two isoSPI ports of DC2792. For any
other hardware setups, where DC2792 is not used, CS
must be set to Main.
Once the connection is established all sub-windows are
enabled and the GUI will be ready to control the device.
The COM port used for communication will be reported
in the Status Bar.
The buttons labeled “Continuous”, “Shutdown” and
“Register Auto Read” are two-state-buttons, meaning,
they change color if they are enabled (highlighted, e.g.,
blue) or disabled (default e.g., grey). Figure20 shows
the GUI running continuous measurements and Register
Auto Read enabled.
Shutdown will put the device into a low power state. Any
serial transaction to the device will wake it up immedi-
ately. For this reason, Register Auto Read will always be
Figure21. GUI: Sleep/Shutdown Note
clicked. If Register Auto Read is enabled, the Time Base
Control values won’t be updated if the user is making
changes to it. Any changed values will be discarded and
replaced by the current device values if the Write but
-
ton is not clicked. If Register Auto Read is disabled, a
click on the Read button will get the current values from
thedevice.
Figure22. GUI: Multimeters
Figure23. GUI: Charge, Energy, Time
LTC2949 WINDOWS GUI USAGE
MULTIMETERS
The GUI shows all measurement quantities in digital mul-
timeter styles. As default all multimeter views are enabled
in the View menu, but accumulators C2, E2, TB2, C3, E4,
TB3, TB4 are hidden under the Charge, Energy, Time 2 tab.
disabled before issuing the shutdown command to the
device. The GUI will report this as shown in Figure21.
Most of the GUI controls will take effect immediately once
they are clicked or a value is entered. The only exception
is the Time Base Control. Any changed configuration and
entered value will only take effect after the Write button is
Accumulated quantities are shown in units of h, Wh, Ah
by default. The units can be changed by right mouse click-
ing on a specific multimeter and selecting a different unit
from the opened context menu. The Charge, Energy, Time
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DEMO MANUAL DC2732A
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1 multimeter in Figure23 shows the context menu for
unit selection.
The Charge, Energy, Time multimeters include a calcu-
lated mean power display. This value is calculated by the
GUI using Energy E1 and Time Base TB1 from the device
and equals E1/TB1.
PLOTS/DATA COLLECTION
The GUI provides several plots of collected data. There is
a plot for slow channel non-accumulated measurements
such as current, voltage, power and temperature. Another
plot is for accumulated charge. There is also a plot for
energy over time and a plot for fast channel measure-
ments. These plots will collect data whenever the device
is in continuous measurement mode and measurement
results are read from the device either by a manual read
(e.g., Update All Registers or read via the register map)
or by the Registers Auto Read function.
The basic steps to start data collection in Register Auto
Read mode are:
• Set continuous conversion.
• Enable Register Auto Read.
• Optional: clear device’s accumulators, trackers and
GUI’s plots to have a clean start for data acquisition.
The order of those steps does not matter. Any time
Continuous and Auto Register Read are activated, data
collection is performed automatically.
By default, the plots do not show all available inputs/chan-
nels. Some channels are hidden but may be enabled via
the plot’s context menu, which can be shown by right
mouse clicking in the plot area. The sub-menu Channels
will list all available data inputs, see Figure24 as an exam-
ple for the fast and slow channel plots.
The plot context menu’s functions are:
1. Clear All plot data.
2. Zoom.
3. Zoom All Plots.
4. Export plot data to Clipboard as CSV (Comma-
separated values).
5. Export plot data to File in CSV format.
Figure24. GUI: Plot Window’s Context Menu, Select Channels
LTC2949 WINDOWS GUI USAGE
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DEMO MANUAL DC2732A
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6. Display/Hide Channels.
7. Display/Hide Trackers (minimum/maximum values,
not available for fast channel and not for accumulated
quantities like charge, energy).
8. Display/Hide Thresholds (low/high alert values, not
available for fast channel).
PLOT ZOOM FIT
The plots may be zoomed in different ways. “Zoom Fit
All” will fit all data except trackers and thresholds into the
plot area. “Zoom Fit X-Axis/Y-Axis” will do the same for
X/Y axis only. “Zoom Fit Limits” will again fit all axes but
will include trackers and thresholds. The latter is helpful
Figure25. GUI: Plot Window’S Context Menu, Zoom
to show the device’s thresholds which may be far above/
below typical measurement values. The low thresholds,
for example, are set to the most negative register value.
In case of power the threshold’s low (P1TL) default value
is –7650.41 Watts (assuming 100μΩ shunt).
The Menu “Zoom All Plots” provides the same functional-
ity but applies the zooming to all plots at the same time.
PLOT PAN, ZOOM, LABELS
The following mouse gestures are supported by the
plotwindows.
1. Pan vertically by right mouse clicking the Y-Axis.
2. Pan horizontally by right mouse clicking the X-Axis.
3. Pan vertically and horizontally by right mouse
clicking the plot area. This will pan the first visible
channelonly.
4. Show label with data point values by left mouse click
on a data line.
5. Zoom vertically by rotating mouse wheel over
theY-Axis.
Figure26. Plot Pan Vertically by Right Mouse Clicking on Y-Axis
Figure28. Plot Show Label by Left Mouse Clicking on Data Line
Figure26. Plot Pan Horizontally by Right Mouse Clicking X-Axis
Figure27. Plot Pan Vertically and Horizontally by Right Mouse
Clicking in Plot Area
LTC2949 WINDOWS GUI USAGE
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DEMO MANUAL DC2732A
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6. Zoom horizontally by rotating mouse wheel over
theX-Axis.
7. Zoom vertically and horizontally by rotating mouse
wheel over the plot area. This will zoom the first vis-
ible channel only.
See also Figure26 thru Figure28 on how to pan, zoom
and showlabels.
Figure29. Voltage Plot, Dragging of TH/TL BAT Indicated by Bold
Threshold Line
CHANGE THRESHOLDS ON-THE-FLY
Once the thresholds are visible, they can be dragged by
the mouse and set to a new desired value. Dragging is
indicated by a bold threshold line in the plot, see Figure29.
The new value is written to the device immediately. The
threshold’s visibility may be changed in the context sub-
menu Thresholds.
Figure30. Plot Window Show Min/Max Trackers
Figure31. Plot Window Export Data
LTC2949 WINDOWS GUI USAGE
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DEMO MANUAL DC2732A
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PLOT TRACKERS
The trackers show the minimum and maximum values of
the non-accumulated quantities (Current, Voltage, etc.).
Overwriting trackers is not possible from the plot win-
dow but can be done in the register map control, see the
Register Map section.
EXPORT PLOT DATA
There are two ways to export the collected data as CSV
(comma-separated values) from the plot. Export to
Clipboard will copy the selected channel data to the clip-
board to be able to paste it to some other program like
MS Excel. Export to File allows the user to choose a file
to store the data. See Figure31.
The CSV data can be easily imported into MS Excel using
the Text Import Wizard as shown in Figure32.
PLOT TIME AXIS
All data is plotted over time, but the meaning of time dif-
fers for the two plots. Non-accumulated quantities (cur-
rent, voltage, etc.) are plotted over real time of the PC. The
time starts when the first values are read from the device
while in continuous mode or when the plots are cleared.
Figure32. Import Plot CSV Data Into Excel
The accumulated quantities charge and energy are plotted
over the corresponding time base. Whenever a triplet of
charge, energy and time of any of the two accumulator
sets is read, it is added to the plot. Charge, energy and
time may be modified during measurement either by a
direct write or by issuing the Clear (Clear Accus, Trackers)
command. Doing so will result in a jump in the plot. If the
time base after this modification is lower than the last time
read, the plot will even go backwards. If this behavior is
not desired, it is recommended to clear accumulators and
trackers together with the plot data (Clear Accus, Trackers,
Plots) or clear the plot data manually (Clear All from the
plot’s context menu).
REGISTER MAP
The Register Map allows direct access to all device
Registers/Values (see Figure33). All data is shown in a
table where each cell corresponds to a single-byte register
or multiple-byte registers grouped to a single device value
like charge, energy and current.
EDIT REGISTER VALUES
Register values can be edited either by selecting a cell
and typing a new value or by double clicking on the cell
to modify the current value. New values are written to the
LTC2949 WINDOWS GUI USAGE
27
DEMO MANUAL DC2732A
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LTC2947 after pressing enter or leaving the cell. An entered
value may be discarded by pressing the Escapebutton.
REGISTER CONTEXT MENU
By clicking on any register header (e.g., Status) or right
clicking on any register value (shown underneath the
header), a context menu with the functions is shown:
1. Change cell’s display format.
2. Show cell/register details.
3. Write cell/register value to device.
4. Read cell/register value from device.
5. Select all cells.
6. Export all to Clipboard.
Figure33. Register Map Control
Format and Details will be explained in the following para-
graphs. The Write and Read command will immediately
write or read the selected cell value to or from the device.
Select All will select all the cells. It is also possible to
select a range of cells or some individual cells by using
Ctrl or Shift key plus the mouse button. The procedure is
the same as for other Windows programs like MS Excel,
for example. The purpose of selecting more than one cell
is to read and write or change the formats of several cells
at once.
DISPLAY FORMAT SELECTION
Each cell’s display format may be set to either Hexadecimal,
Decimal, Binary or Physical. The Physical format (in A,
As, W, V, etc.) is only available for cells having a physical
value representation as the measurement, tracking and
threshold values.
LTC2949 WINDOWS GUI USAGE
28
DEMO MANUAL DC2732A
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The default cell format is Decimal. All cell values may be
changed at once to the physical format, for example. This
is done by first selecting all cells, either using the shift key
plus mouse button or by using the Select All function from
the context menu. Then right click on any of the selected
cells to open the context menu and set the new format.
Figure34. Register Details View, OPCTRL Example
Figure35. Register Details View, FCURGPIOCTRL Example
Figure36. Change Format of Register Values
The binary and hexadecimal formats are indicated by a
0b and 0x suffix. The physical and decimal format can be
distinguished by the tooltip that is shown after the mouse
has rested for a short while over the cell value. This tooltip
will show the corresponding unit if it is a physical value
or the corresponding LSB value for all the other formats.
LTC2949 WINDOWS GUI USAGE
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DEMO MANUAL DC2732A
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Figure37. Tooltip Showing Register Description
Figure38. Tooltip Showing Register Value LSB Size
REGISTER MAP TOOLTIPS
The register map includes a lot of helpful information
shown in tooltips. They appear after the mouse has rested
for a short while over an element of the register map.
REGISTER DETAILS
For registers that have bits assigned to functions, the
register context menu provides access to a details view.
Figure34 shows as an example the access to the details
view of OPCTL. Click on the name OPCTL or right click on
the cell value, select Details from context menu. All bits
with defined functions are listed with check boxes next
to them indicating if the corresponding bit is set or not.
Tooltips show more detailed descriptions for each bit.
Any changes may be performed by clicking on the check
boxes. After clicking on Confirm changes the new value is
assigned to the cell, still allowing to make changes to it.
The new value will be written to the device after hitting the
ENTER key or leaving the cell (e.g., clicking somewhere
else in the register map).
AUTO READ MENU
The Auto Read menu allows users to specify which regis-
ters/values are read from the device if Register Auto Read
is enabled. The update time may also be specified here.
Once Register Auto Read is clicked the first time, it will
automatically make the configuration to read Current,
Voltage, Power, Temp. from slow channel and set the
update time to 100ms.
Figure39. Auto Read Menu
Figure40. Valid Range of Update Time
LTC2949 WINDOWS GUI USAGE
The update time may be adjusted between 1ms and 10s.
An error will be reported if the entered value is outside
this range.
Note, that the update time is not the period at which data
is read from LTC2949, but rather the delay between per-
formed updates. This means the period will always be lon-
ger than this time and depends also on the performance
of the used PC. Still, the main limitation of update speed
is the serial interface to the Linduino. Update speed can
usually be increased by selecting only the measurements
from the Auto Read menu that are of interest for the cur-
rent evaluation purpose and disable all the others. It is
then still possible to manually read other values from the
Register Map, even while Auto Read is enabled.
30
DEMO MANUAL DC2732A
Rev. 0
Figure41. Tools Menu
TOOLS MENU
The Tools menu provides access to a stand-alone TBC
Calculator and to report functions that generate C-compliant
source code for register, bit and LSBdefinitions.
BASIC OPERATION EXAMPLE
The following shows an example of basic configuration
and operation of LTC2949 with the GUI.
1. Enable default Layout of the GUI.
a. View → Reset Default Layout.
2. Connect to device from operation control.
3. Enable P2 as voltage from ADC config.
4. Click Update Configuration from Operation
Control/Misc.
5. Click Continuous from Operation Modes.
6. Enable Ch2 fast and AUX fast from Fast Channel
Control.
7. From MUX Settings set Fast to VREF2 – GND (any
other channel is also possible, e.g., if some external
signal is applied).
8. Go to “Auto Read” menu and select.
a. Fast all.
b. Page0 Registers/Values.
c. Enable.
9. The Plot: “Fast Channel” and the “Fast Channel
Multimeter” will show the fast measurements. From
the fast channel plot context menu select “Channels”
→“BAT…” to also enable plot of battery voltage.
10. From MUX Settings set Fast to V8 – GND (Note: V8
is one of the dual purpose pins GPIO1).
11. From the center low Element of the GUI Window select
“Register Map”, from which all registers of LTC2949
can be accessed.
12. Scroll down little bit to see the register row “OPCTRL,
FCURGPIOCTRL, FGPIOCTRL, ….”
13. Right click on FGPIOCTRL.
14. Enable GPIO1CTRL1 (all other disabled).
15. Hit Enter (from you keyboard) two times to
confirmchanges.
16. The new configuration is now written to LTC2949 and
activates the toggling on GPIO1 (V8)
17. Watch the effect in the Plot: fast channel.
18. Change GPIO1 setting from register map from
FGPIOCTRL: Values can also be just entered in the
cell of FGPIOCTRL and confirmed by pressing the
enter key (Figure47).
a. Alternate between 0, 1, 2, 3 and watch the effect
in the Plot: fast channel, Auxiliary fast channel
(Figure48).
19. Note: Setting the GPIO control bits to 1,1 (decimal 3)
will enable the output driver to go to DVCC which can
be above the full-scale range of the ADC, depending
on the power supply voltage of AVCC, DVCC. The ADC
will just saturate to its full-scale value.
LTC2949 WINDOWS GUI USAGE
32
DEMO MANUAL DC2732A
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Figure45. Register Map Access for Basic Operation Example
LTC2949 WINDOWS GUI USAGE
Figure46. FGPIOCTRL Register Details View to Control GPO1 for Basic Operation Example
Figure47. FGPIOCTRL Register Direct Access for Basic Operation Example
Figure48. Fast Channel Plot for Basic Operation Example Showing Alternating AUX Measurements
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DEMO MANUAL DC2732A
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APPENDIX A: USAGE OF SPI ISOLATOR INSTEAD OF ISOSPI
Figure49. ADUM141E SPI Isolator Schematic
If required by customer, it is also possible to use a SPI iso-
lator instead of LTC2949’s integrated isoSPI. One exam-
ple is the ADuM141E which could be inserted into the SPI
interface using the Linduino QuikEval connector J4 and
then connect to the Linduino or any other host controller,
as shown in in Figure49. In this scenario IOVCC of the
LTC2949 is shorted to BYP2 which will then also sup-
ply VDD1 of the ADuM141E. Usage of other SPI isolators
with additional chip select lines is also possible, which
would allow to connect additional SPI slaves together with
LTC2949. Please contact Analog Device for details on this
evaluation setup.
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DEMO MANUAL DC2732A
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The DC2732A can be used in conjunction with the Linduino
and the DC2617A in a CAN based evaluation and test envi-
ronment, which is described in the followingparagraphs.
HARDWARE REQUIREMENTS
• DC2617A (CAN to isoSPI shield).
• DC2732A (LTC2949 demo board).
• Ethernet cable.
• 5V power supply.
• Linduino (DC2026).
• Power to the Linduino (either via USB or AC
ADAPTORIN).
• Optional: 120Ω reset pull-up on Linduino between
RST and IOREF to prevent Linduino reset in case
Linduino is connected to the USB port of a PC, but
its COM port is not opened.
SOFTWARE REQUIREMENTS
• Some CAN analyzer or CAN master to control
the DC2732A_CAN and receive messages (e.g.,
BUSMASTER).
• DC2732A_CAN.ino programmed to the Linduino.
APPENDIX B: CAN BASED EVALUATION
• DC2732A_CAN.dbf loaded to the CAN analyzer
software.
• Optional: Serial terminal software (e.g., Arduino IDE’s
serial monitor) connected to the Linduino’s COM port.
SETUP THE HARDWARE
Put the DC2617A on top of the Linduino. Connect
LTC2949 demo board via an Ethernet cable to the RJ45
connector. Connect power to the Linduino (either via USB
or AC ADAPTOR IN). Set JP1 on DC2617A to ARD and JP2
to ON to enable 120R CAN bus termination.
Note 1: If the Linduino is connected to a USB port of
a PC, depending in the operating system, the board
will make periodic resets. This is caused by Windows
and the USB COM port driver accessing the COM port
assigned to the Linduino. This can be prevented by
either making a connection via a serial terminal to
the COM port or by connecting a 120R pull-up on
Linduino between RST and IOREF. If a plain external
USB power supply or the “AC ADAPTOR IN” is used
to power the Linduino, this problem does not appear.
Note 2: 5V supply input of the LTC2949 demo board
may be connected to VCC, GND turrets of DC2617A.
Still this is not recommended as it shorts the galvanic
isolation between LTC2949 and DC2617A.
Figure50.
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DEMO MANUAL DC2732A
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APPENDIX B: CAN BASED EVALUATION
Connect 5V to 12V supply to DC2732A demo board.
Connect Ethernet patch cable between RJ45 connectors
of DC2732A and DC2617A.
Figure51. DC2732A Demoboard
Figure52. FSSHT, FIFOAUX, FIFOBAT, FIFOI2, FIFOI1,
FIFOAUXAVG, FIFOBATAVG, FIFOI2AVG, FIFOI1AVG Use
the Little-Endian Representation for Their Signal Data (All
Other Messages Use Big-Endian Format)
The DC2732A_CAN uses CAN messages listed in Table
1. See also DC2732A_CAN.dbf / DC2732A_CAN.dbc for
scaling factors and units.
All current dependent measurement quantities have to be
scaled with 1/RSNS, where RSNS is the resistance of the
shunt resistor.
Example ACC_C1/ACC_E1:
The scaling factors and units from the .dbc file are:
BO_ 293 ACC_C1: 6 Vector__XXX
SG_ C1 : 7|48@0- (0.377887,0)
[-5.31829e+013|5.31829e+013] “uVms”
Vector__XXX
BO_ 294 ACC_E1: 6 Vector__XXX
SG_ E1 : 7|48@0- (2.32175,0)
[-3.26757e+014|3.26757e+014] “uVVms”
Vector__XXX
BO_ 295 ACC_TB1: 4 Vector__XXX
SG_ TB1 : 7|32@0- (0.397777,0)
[-8.5422e+008|8.5422e+008] “ms”
Vector__XXX
The factors are taken from LTC2949 data sheet: Table 26.
Accumulated Results Register Parameters for Use with
Crystal or Internal Clock but scaled for units ms and μV.
Charge is given in microvolts times milliseconds, Energy
is given in microvolts times volts times millisecond. The
conversion to As/Ws in case of a 100μΩ shunt is:
Charge = ACC_C1[uV*ms] / 1e6[uV/V]
/ 1000[ms/s] / 100e-6[Ohms] = ACC_C1 *
1e-5 [Vs/Ohms = As]
Energy = ACC_E1[uV*V*ms] / 1e6[uV/V]
/ 1000[ms/s] / 100e-6[Ohms] = ACC_E1 *
1e-5 [V2 s / Ohm = VAs = Ws]
DC2732A_CAN: LTC2949 CAN FIRMWARE
DC2732A_CAN’s CAN baud rate is set to 500k Bit/s but
may be changed via the Serial monitor.
CAN Messages Overview
The DC2732A_CAN uses CAN messages listed in Table1.
See also DC2732A_CAN.dbf.
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DEMO MANUAL DC2732A
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Table1. CAN Messages with Measurement Values Send by DC2732A_CAN
ID NAME SIGNAL T, [BYTES], BITS CFG2949 FLAG DESCRIPTION
0x110 IP1V I1 Int, [2:0], 24 MEAS_I1 Current1
P1 Int, [5:3], 24 MEAS_P1 Power1
BAT Int, [7:6], 16 MEAS_BAT Battery Voltage
P1 Will Be Reported by This Message If P1ASV Flag is Not Set. Otherwise Battery Voltage by Power ADC Will Be Reported by PASV Message.
0x111 IP2T I2 Int, [2:0], 24 MEAS_I2 Current2
P2 Int, [5:3], 24 MEAS_P2 Power2
TEMP Int, [7:6], 16 MEAS_TEMP IC Temperature
P2 Will Be Reported by This Message If P2ASV Flag Is Not Set. See Also Note Above.
0x112 SVR SLOT1 Int, [1:0], 16 MEAS_SLOT1 Slot1 voltage
SLOT2 Int, [3:2], 16 MEAS_SLOT2 Slot2 voltage
VREF Int, [5:4], 16 MEAS_VREF Reference Voltage (VREF Pin)
VCC Int, [7:6], 16 MEAS_VCC IC Supply Voltage
SLOT1/SLOT2 Voltage Will Be Reported by This Message If SLOT1NTC/SLOT2NTC Flag Is Not Set. Otherwise Temperature by NTC Measurement Will Be
Reported by SLOTSNTC Message.
0x113 SLOTSNTC NTC1 Int, [1:0], 16 MEAS_SLOT1,
SLOT1NTC
NTC Temperature Measurement via Slot1
NTC2 Int, [3:2], 16 MEAS_SLOT2,
SLOT2NTC
NTC Temperature Measurement via Slot2
NTC1/NTC2 Temperature Will Be Reported by This Message If SLOT1NTC/SLOT2NTC Flag Is Set.
0x114 PASV P1V Int, [2:0], 24 MEAS_P1, P1ASV Power1 as Voltage
P2V Int, [5:3], 24 MEAS_P2, P2ASV Power2 as Voltage
P1V/P2V (Power ADC in Voltage Mode) Will Be Reported by This Message If P1ASV/P2ASV Flag Is Set.
0x115 No used
0x116 No used
0x125 ACC_C1 C1 Int, [5:0], 4 8 ACC Charge1
0x126 ACC_E1 E1 Int, [5:0], 48 ACC Energy1
0x127 ACC_TB1 TB1 Int, [3:0], 32 ACC Time1
0x128–0x12E Optional, See Below.
C2, C3, E2, E4, TB2, TB3, TB4 are not reported as default. Values can still be read via RAWRW if required. Alternatively, if dedicated CAN messages for
those additional accumulators are needed, they can be enabled within the DC2732A_CAN.ino source code via the preprocessor definition ENABLE_CAN_
ID_ACC_C2_TO_TB4. Those messages will have the CAN IDs 0x128–0x12E.
Notes:
1. “T, [Bytes], Bits’ indicates the type, byte order (typically big-endian) and number of bits. For example, “Int, [0:2], 24” refers to a 24-bit big-endian integer
value stored in CAN message data bytes 0 to 2 where byte 0 is the MSB.
2. CFG2949 flag refers to the Boolean signal within CFG2949 that enables the related measurement signal. Above CAN messages will be send if any of the
related CFG2949 flags are enabled. Signals within CAN messages that are not enabled will report the most negative value.
APPENDIX B: CAN BASED EVALUATION
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Rev. 0
Table2. CAN Messages Send to DC2732A_CAN to Configure Fast Measurements
ID NAME SIGNAL T, [BYTE], BITS DESCRIPTION
0x11D FASTRQ SAMPLES UInt, [1:0], 16 Number of samples to be read on demand or per cycle. Or number of
samples of moving average filter for I2.
FAST_MEAS_
PERIOD
UInt, [2], 8 Fast measurement cycle time in milliseconds. If greater than zero, fast
measurements are reported periodically. If zero a single measurement
(on demand) is reported.
Fast conversion request. For fast continuous measurements SAMPLES is the number of samples to be read from FIFO. If SAMPLES is 0 or 1, no samples
will be read from the FIFO, instead only the latest converted sample is read via RDCV command and reported.
For fast continuous measurements with FAST_MEAS_PERIOD = 1, no samples will be read from the FIFO, instead only the latest converted sample is read
via RDCV command and reported.
For fast single shot measurements SAMPLES sets the number I2 samples moving average filter. Set to 0 or 1 to disable. If set to >1 and <129 the moving
average filter of I2 fast samples is enabled and filtered I2 fast single shot result will be transmitted via FSSHTMA. This is for a typical configuration where
I1 is doing slow precision measurements for coulomb counting and only I2 (and optional BAT and AUX) is doing fast conversions.
Table3. CAN Messages Send by DC2732A_CAN to Report Fast Measurement Results
ID NAME SIGNAL T, [BYTE], BITS DESCRIPTION
0x118 FIFOI1 S0 Int, [1:0], 16 Four fast continuous conversion results.
0x119 FIFOI2 S1 Int, [3:2], 16
0x11A FIFOBAT S2 Int, [5:4], 16
0x11B FIFOAUX S3 Int, [7:6], 16
N samples read from the FIFO will be reported by N/4 CAN messages. If N is not a multiple of 4, the last message will be truncated accordingly (e.g.,if
10samples are reported, the last message will contain only S0 and S1 and thus only have 4 bytes). Signal format is little endian.
0x11C FSSHT I1 Int, [1:0], 16 Fast single shot conversion result or last conversion
result in fast continuous mode.
I2 Int, [3:2], 16
BAT Int, [5:4], 16
AUX Int, [7:6],16
This message is used to report fast single shot conversion results. In case fast continuous mode is activated and 0 or 1 (= signal SAMPLES of message
FASTRQ) samples are requested, this message will be used to report the last acquired sample from the fast channel. Signal format is little endian.
0x120 FIFOI1AVG …AVG Int, [3:0], 32 Average of all samples multiplied by 1024 (= fixed point
representation with 10 fractional bits)
0x121 FIFOI2AVG
0x122 FIFOBATAVG LEN UInt, [5:4], 16 Number of samples acquired to calculate the average
0x123 FIFOAUXAVG
The LSB size of the above average signals is those of FIFOI1, FIFOI2, FIFOBAT, FIFOAUX Divided by 1024. Signal format is little endian.
0x124 FSSHTMA I2MA Int, [3:0], 32 Moving average of fast single shot I2 conversion results
This message is used to report moving average of fast single shot I2 conversion results. Signal format is little endian.
APPENDIX B: CAN BASED EVALUATION
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DEMO MANUAL DC2732A
Rev. 0
Table4. CAN Message Send by DC2732A_CAN to Signal Errors
ID NAME SIGNAL T, [BYTE], BITS DESCRIPTION
0x11E ERR COMMERR Bool, [0] (4)
FIFOWROVR Bool, [0] (5)
FIFOTAGERR Bool, [0] (6)
OTHER Bool, [0] (7)
TIMEOUT Bool, [0] (3)
FIFOALLERR Bool, [0] (2)
PECERR UInt, [0] (1:0)
Error message. Combination (ORing) of error codes (bits [7:2]) and PEC error counter (bits [1:0]). The PEC counter counts the PEC errors when receiving
data from the LTC2949 and will stop counting at 3.
Note: “T, [Byte], Bits” indicates the type and number of bits. For example, “Int, [0], 8” refers to an 8-bit integer value stored in CAN message data byte 0.
Table5. CAN Message Received by DC2732A_CAN to Configure Measurements
ID Name Signal T, [Byte], Bits Description
0x11F CFG2949 CH1FAST Bool, [0] (0) CH1 fast enable flag
CH2FAST Bool, [0] (1) CH2 fast enable flag
AUXFAST Bool, [0] (2) AUX fast enable flag
FCONT Bool, [0] (3) fast continuous enable flag (fast measurements will be stored within FIFO, otherwise
fast single shot measurements will be performed upon request, see FASTRQ)
SLOT1NTC Bool, [0] (4) SLOT1 temperature measurement via NTC enable flag
SLOT2NTC Bool, [0] (5) SLOT2 temperature measurement via NTC enable flag
If enabled an NTC must be connected to the voltage inputs selected via SLOTxP/N which then will be used for temperature measurements.
P1ASV Bool, [0] (6) Power1 as voltage enable flag
P2ASV Bool, [0] (7) Power2 as voltage enable flag
SLOT1P UInt, [1] (3:0) Positive voltage input channel for SLOT1
SLOT1N UInt, [1] (7:4) Negative voltage input channel for SLOT1
SLOT2P UInt, [2] (3:0) Positive voltage input channel for SLOT2
SLOT2N UInt, [2] (7:4) Negative voltage input channel for SLOT2
SLOTFP UInt, [3] (3:0) Positive voltage input channel for SLOTF (AUX fast)
SLOTFN UInt, [3] (7:4) Negative voltage input channel for SLOTF (AUX fast)
MEAS_I1 Bool, [4] (0) Current1 measurement enable flag
MEAS_I2 Bool, [4] (1) Current2 measurement enable flag
MEAS_P1 Bool, [4] (2) Power1 measurement enable flag
MEAS_P2 Bool, [4] (3) Power2 measurement enable flag
MEAS_SLOT1
Bool, [4] (4) Slot1 measurement enable flag
MEAS_SLOT2
Bool, [4] (5) Slot2 measurement enable flag
APPENDIX B: CAN BASED EVALUATION
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Rev. 0
APPENDIX B: CAN BASED EVALUATION
Table5. CAN Message Received by DC2732A_CAN to Configure Measurements
ID Name Signal T, [Byte], Bits Description
MEAS_BAT Bool, [4] (6) Battery voltage measurement enable flag
MEAS_TEMP Bool, [4] (7) IC temperature measurement enable flag
MEAS_VCC Bool, [5] (0) IC supply voltage measurement enable flag.
MEAS_VREF Bool, [5] (1) Reference voltage (VREF pin) measurement enable flag.
Any combination of measurement enable flags may be set to
NTC1_TYPE Bool, [5] (3:2) Selects on of 3 predefined NTC parameters.
NTC2_TYPE Bool, [5] (5:4)
NTCx_TYPE MPN A B C RREF
0 NTCALUG01A104F/TDK 9.85013754e-4 1.95569870e-4 7.69918797e-8 100e3
1 NTHCG143/Murata 8.39126e-4 2.08985e-4 7.13241e-8 100e3
2 Reserved 8.39126e-4 2.08985e-4 7.13241e-8 100e3
For NTCx_TYPE = 3, no configuration of NTC parameters will be written to LTC2949 with the CFG2949 message. This allows user defined
values provided via a RAWRW message.
ACC Bool, [5] (6) Battery voltage measurement enable flag. If set the accumulators C1, E1, TB1 are
reported via CAN messages ACC_C1, ACC_E1, ACC_TB1.
MEAS_
ENABLE
Bool, [5] (7) Global measurements enable. Only if this flag is set DC2732A_CAN will do
measurements and react on FASTRQ.
MEAS_
PERIOD
UInt, [6],8 Measurement period in multiples of 100ms. For example, if set to 10 all enabled
measurement CAN messages will be send every second. If set to zero messages
will be send at the update rate of LTC2949 which is ~100ms. A value of 1 (100ms)
may result in a jitter of the actual send message period as the internal update rate
of LTC2949 may vary and messages will never be sent before LTC2949 updates its
measurement registers. Setting a value of 255 will completely disable reading of slow
channel registers. Fast channel values may still be reported.
FAST_MEAS_
PERIOD
UInt, [7],8 Fast measurement cycle time in milliseconds. If greater than zero, fast measurements
are reported periodically. Same as signal FAST_MEAS_PERIOD of CAN
messageFASTRQ.
Notes:
1.“T, [Byte], Bits” indicates the type and number of bits. For example ,“Int, [0], 8” refers to an 8-bit integer value stored in CAN message data byte 0.
2. For Boolean signals the bit index is given in round brackets, for example, “Bool, [4] (7)” refers to a flag stored at bit position 7 within CAN data byte 4.
3. For signals covering only part of a byte the bit range is given in round brackets, for example, “UInt, [3] (7:4)” refers to an unsigned integer value
covering bits [7:4] within CAN data byte 3.
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Table6. CAN Message Send and Received by DC2732A_CAN for RAW LTC2949 Register Access
ID NAME SIGNAL T, [BYTE],BITS DESCRIPTION
0x117 RAWRW WRITE Bool, [0] (7) Write flag. Set for write commands, clear for read commands. In the responding
message send by DC2732A_CAN this flag will be inverted (e.g., after a write send to
DC2732A_CAN the WRITE flag will be cleared in the response message)
COUNTDOWN UInt, [0], (6:1) Countdown tag for multi RAWRW CAN message bursts. For RAWRW messages with
up to 6 data bytes COUNTDOWN must be zero. If more than 6 bytes must be written
in a burst to LTC2949 COUNTDOWN must be decremented with every message till
zero for the last message. If the number of bytes is not a multiple of 6 bytes only
the first message of the multi RAWRW CAN message bursts may have less than
6bytes. WRITE, PAGE and ADDR must be equal for all sub-messages of a burst. The
following table shows an example how to write a burst with 16 bytes (e.g., a full row in
LTC2949’s register map).
MESSAGE COUNTDOWN CAN DATA LENGTH DX SIGNALS
1 2 6 D0 – D1 (4)
2 1 8 D0 – D5 (6)
3 0 8 D0 – D5 (6)
Messages send by DC2732A_CAN in response to a read command will make the same
usage of COUNTDOWN to pack more than 6 bytes into several CAN messages.
PAGE Bool, [0] (0) Register page flag. Set for page 1, clear for page 0.
ADDR Int, [1], 8 Register address
D0 Int, [2], 8 Write: Data byte 0/Read: Length (number of bytes to be read)
D1 Int, [3], 8 Register byte 1
D2 Int, [4], 8 Register byte 2
D3 Int, [5], 8 Register byte 3
D4 Int, [6], 8 Register byte 4
D5 Int, [7], 8 Register byte 5
Notes:
1. Page as MSB followed by 8-bit address is equivalent to a 9-Bit address value as defined in DC2732A_CAN.dbf and in the register constants in
LTC2949.h.
2. The number of register bytes Dx to be send in a RAWRW CAN message is defined by the CAN message data length – 2, as two bytes are always
reserved for WRITE, PAGE, COUNTDOWN and ADDR.
APPENDIX B: CAN BASED EVALUATION
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DEMO MANUAL DC2732A
Rev. 0
APPENDIX B: CAN BASED EVALUATION
BASIC OPERATION EXAMPLES
Current, Power, BAT (100ms)
Examples shows measurement of Current (I1), Power (P1) and battery voltage (BAT) at LTC2949’s update rate of100ms.
***BUSMASTER Ver 3.2.2***
***PROTOCOL CAN***
***NOTE: PLEASE DO NOT EDIT THIS DOCUMENT***
***[START LOGGING SESSION]***
***HEX***
***RELATIVE MODE***
***CHANNEL 1 - PCAN-USB Driver Id 16 - 500000 bps***
***START DATABASE FILES***
***DC2732A_CAN\DC2732A_CAN.dbf***
***END DATABASE FILES***
***<Time><Tx/Rx><Channel><CAN ID><Type><DLC><DataBytes>***
• Send CFG2949 with flags MEAS_BAT, MEAS_I1, MEAS_P1, MEAS_ENABLE set and MEAS_PERIOD = 0
00:01:36:4389 Tx 1 0x11F s 8 00 01 00 00 45 80 00 00
• Measurement results reported every ~0.1 second (see above CAN message ID description)
00:00:00:3140 Rx 1 0x110 s 8 00 00 04 00 00 01 FF D7
00:00:00:0968 Rx 1 0x110 s 8 00 00 00 00 00 01 FF D7
00:00:00:0969 Rx 1 0x110 s 8 FF FF FE 00 00 01 FF D7
00:00:00:0977 Rx 1 0x110 s 8 FF FF FE 00 00 01 FF D7
…
• Stop measurement
00:00:00:0137 Tx 1 0x11F s 8 00 01 00 00 45 00 00 00
***END DATE AND TIME 17:4:2018 11:46:33:344***
***[STOP LOGGING SESSION]***
I1, P1, BAT (100ms), I2fast, BATFast (1ms to 2ms)
Examples shows measurement of Current (I1), Power (P1) and battery voltage (BAT) at LTC2949’s update rate of
100ms plus fast current and battery voltage measurement every 1ms to 2ms (nominal 0.8ms but here limited by host
controller speed)
***BUSMASTER Ver 3.2.2***
…
***<Time><Tx/Rx><Channel><CAN ID><Type><DLC><DataBytes>***
• Start of measurement: MEAS_BAT, MEAS_I1, MEAS_P1, CH2FAST, FCONT, P2ASV, MEAS_ENABLE, MEAS_PERIOD
= 0, FAST_MEAS_PERIOD = 1
00:00:12:8961 Tx 1 0x11F s 8 8A 01 00 00 45 80 00 01
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APPENDIX B: CAN BASED EVALUATION
• Fast measurement results (I2, BAT, others: don’t care!)
00:00:00:1989 Rx 1 0x11C s 8 00 C0 01 00 D7 FF 04 C0
00:00:00:0013 Rx 1 0x11C s 8 00 C0 02 00 D7 FF 04 C0
00:00:00:0014 Rx 1 0x11C s 8 00 C0 01 00 D7 FF 04 C0
00:00:00:0018 Rx 1 0x11C s 8 00 C0 01 00 D7 FF 04 C0
00:00:00:0013 Rx 1 0x11C s 8 00 C0 01 00 D8 FF 04 C0
00:00:00:0014 Rx 1 0x11C s 8 00 C0 FF FF EE FF 04 C0
• Slow measurement results (I1, P1, BAT)
00:00:00:0019 Rx 1 0x110 s 8 FF FF FE 00 00 01 FF EB
• Fast measurement results (I2, BAT, others: don’t care!)
00:00:00:0010 Rx 1 0x11C s 8 00 C0 FF FF EE FF 04 C0
00:00:00:0014 Rx 1 0x11C s 8 00 C0 00 00 EE FF 04 C0
…
• Slow measurement results (I1, P1, BAT)
00:00:00:0019 Rx 1 0x110 s 8 FF FF FD 00 00 01 FF F2
• Fast measurement results (I2, BAT, others: don’t care!)
00:00:00:0010 Rx 1 0x11C s 8 00 C0 FF FF F2 FF 04 C0
00:00:00:0014 Rx 1 0x11C s 8 00 C0 00 00 F2 FF 04 C0
…
• Fast measurement results (I2, BAT, others: don’t care!)
00:00:00:0018 Rx 1 0x11C s 8 00 C0 FF FF EB FF 04 C0
00:00:00:0014 Rx 1 0x11C s 8 00 C0 00 00 EB FF 04 C0
00:00:00:0013 Rx 1 0x11C s 8 00 C0 00 00 EB FF 04 C0
• Stop measurement
00:00:00:0007 Tx 1 0x11F s 8 8A 01 00 00 45 00 00 01
• Last fast measurement results before stop of measurement
00:00:00:0011 Rx 1 0x11C s 8 00 C0 00 00 EB FF 04 C0
***END DATE AND TIME 17:4:2018 11:51:46:257***
***[STOP LOGGING SESSION]***
I1, P1, BAT (100ms), I2fast, BATFast (average 10ms)
Examples shows measurement of Current (I1), Power (P1) and battery voltage (BAT) at LTC2949’s update rate of
100ms plus fast current and battery voltage measurements averaged over 10ms. Every 10ms roughly 13 samples
(10ms/0.8ms = 12.5) each are read from FIFOI1 and FIFOBAT and reported as averaged values.
***BUSMASTER Ver 3.2.2***
…
***<Time><Tx/Rx><Channel><CAN ID><Type><DLC><DataBytes>***
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APPENDIX B: CAN BASED EVALUATION
• Start of measurement: MEAS_BAT, MEAS_I1, MEAS_P1, CH2FAST, FCONT, P2ASV, MEAS_ENABLE, MEAS_PERIOD
= 0, FAST_MEAS_PERIOD = 0
00:03:58:2797 Tx 1 0x11F s 8 8A 01 00 00 45 80 00 00
• Slow measurement results (I1, P1, BAT)
00:00:00:2915 Rx 1 0x110 s 8 00 00 02 00 00 01 FF D7
00:00:00:0967 Rx 1 0x110 s 8 FF FF FF 00 00 00 FF DF
…
• Enable fast measurement results read-out from FIFO (max. 128 samples each cycle, cycle period = 10ms)
00:00:00:0403 Tx 1 0x11D s 3 00 80 0A
• Report of FIFOI2 raw values (only done once initially to show report of currently available FIFO RAW values.
Afterwards only the average of the FIFO samples will be reported)
00:00:00:0148 Rx 1 0x119 s 8 00 00 FF FF FF FF FF FF
00:00:00:0003 Rx 1 0x119 s 8 FF FF FF FF 00 00 FF FF
…
• Average of FIFOI2 and number of samples used for average (here 128)
00:00:00:0004 Rx 1 0x121 s 6 00 00 00 80 80 00
• Report of FIFOBAT raw values (only done once initially to show report of currently available FIFO RAW values.
Afterwards only the average of the FIFO samples will be reported)
00:00:00:0136 Rx 1 0x11A s 8 E2 FF E2 FF E2 FF E2 FF
00:00:00:0005 Rx 1 0x11A s 8 E2 FF E2 FF E2 FF E2 FF
…
• Average of FIFOBAT and number of samples used for average (here 128)
00:00:00:0004 Rx 1 0x122 s 6 00 00 00 80 80 00
• Slow measurement results (I1, P1, BAT)
00:00:00:0022 Rx 1 0x110 s 8 FF FF FD 00 00 00 FF E1
• Average of FIFOI2 and number of samples used for average (here 13)
00:00:00:0112 Rx 1 0x121 s 6 00 08 00 00 0D 00
00:00:00:0028 Rx 1 0x122 s 6 00 00 00 80 10 00
00:00:00:0077 Rx 1 0x121 s 6 B1 07 00 00 0D 00
00:00:00:0025 Rx 1 0x122 s 6 00 00 00 80 0E 00
00:00:00:0069 Rx 1 0x121 s 6 9D 04 00 00 0D 00
…
• Stop measurement
00:00:00:0047 Tx 1 0x11F s 8 8A 01 00 00 45 00 00 00
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APPENDIX B: CAN BASED EVALUATION
• Last fast measurement results before stop of measurement
00:00:00:0030 Rx 1 0x121 s 6 00 00 00 80 0D 00
00:00:00:0025 Rx 1 0x122 s 6 00 00 00 80 0E 00
***END DATE AND TIME 17:4:2018 11:56:19:410***
***[STOP LOGGING SESSION]***
ADDITIONAL OPERATION EXAMPLES
Usage of RAWRW
• Send CFG2949 with flags CH2FAST, AUXFAST, P2ASV, MEAS_I1, MEAS_ENABLE set and MEAS_PERIOD set to 10
00:00:27:6178 Tx 1 0x11F s 8 86 01 73 74 01 80 0A 01
• See Measurement results of Current1 (I1) every second (here: 3LSBs)
00:00:00:9990 Rx 1 0x110 s 3 00 00 03
00:00:00:9989 Rx 1 0x110 s 3 00 00 03
00:00:00:9979 Rx 1 0x110 s 3 00 00 03
• Send FASTRQ at any time to make a fast single shot conversion
00:00:00:6957 Tx 1 0x11D s 0
• See FSSHT as the response
00:00:00:0033 Rx 1 0x11C s 8 00 80 00 00 65 FF 3C 02
• Send CFG2949 with flag MEAS_ENABLE cleared to stop measurement
00:00:00:8610 Tx 1 0x11F s 8 86 01 73 74 01 00 0A 01
• Send RAWRW with COUNTDOWN = 0, WRITE = 0, ADDR = 0, D0 = 16, CAN-Message-Data-Length = 3 to read C1,
E1, TB1 (see LTC2949’s data sheet for LSB values. DC2732A_CAN is configured to use the internal clock)
00:01:58:4164 Tx 1 0x117 s 3 00 00 10
00:00:00:0385 Rx 1 0x117 s 6 04 00 00 00 00 03
00:00:00:0004 Rx 1 0x117 s 8 02 00 F4 0F 00 00 00 00
00:00:00:0004 Rx 1 0x117 s 8 00 00 4F C2 00 01 58 7B
• Send three RAWRW messages to clear C1. E1 and TB1: (for all messages WRITE = 1, ADDR = 0)
MESSAGE COUNTDOWN CAN DATA LENGTH DX SIGNALS
1 2 6 D0 – D1 All Zero
2 1 8 D0 – D5 All Zero
3 0 8 D0 – D5 All Zero
00:02:00:0434 Tx 1 0x117 s 6 84 00 00 00 00 00
00:00:01:8720 Tx 1 0x117 s 8 82 00 00 00 00 00 00 00
00:00:01:5680 Tx 1 0x117 s 8 80 00 00 00 00 00 00 00
00:00:00:0493 Rx 1 0x117 s 4 00 00 10 00
45
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Rev. 0
APPENDIX B: CAN BASED EVALUATION
• Send RAWRW with COUNTDOWN = 0, WRITE = 0, ADDR = 0, D0 = 16, CAN-Message-Data-Length = 3 to
read C1, E1, TB1 again and check all data is now zero.
00:00:09:9925 Tx 1 0x117 s 3 00 00 10
00:00:00:0279 Rx 1 0x117 s 6 04 00 00 00 00 00
00:00:00:0004 Rx 1 0x117 s 8 02 00 00 00 00 00 00 00
00:00:00:0004 Rx 1 0x117 s 8 00 00 00 00 00 00 00 00
• See below for the full log file of this example recorded with BUSMASTER
***BUSMASTER Ver 3.2.0***
***PROTOCOL CAN***
***NOTE: PLEASE DO NOT EDIT THIS DOCUMENT***
***[START LOGGING SESSION]***
***START DATE AND TIME 8:5:2017 15:21:16:468***
***HEX***
***RELATIVE MODE***
***START CHANNEL BAUD RATE***
***CHANNEL 1 - PCAN-USB Driver Id 16 - 500000 bps***
***END CHANNEL BAUD RATE***
***START DATABASE FILES***
***… \LTSketchbook\DC\DC2732A_CAN\DC2732A_CAN.dbf***
***END DATABASE FILES***
***<Time><Tx/Rx><Channel><CAN ID><Type><DLC><DataBytes>***
00:00:27:6178 Tx 1 0x11F s 8 86 01 73 74 01 80 0A 01
00:00:01:2543 Rx 1 0x110 s 3 00 00 03
00:00:00:9990 Rx 1 0x110 s 3 00 00 03
00:00:00:9989 Rx 1 0x110 s 3 00 00 03
00:00:00:9979 Rx 1 0x110 s 3 00 00 03
00:00:00:9989 Rx 1 0x110 s 3 00 00 03
00:00:00:9979 Rx 1 0x110 s 3 00 00 03
00:00:00:9990 Rx 1 0x110 s 3 00 00 03
00:00:00:9979 Rx 1 0x110 s 3 00 00 03
00:00:00:9989 Rx 1 0x110 s 3 00 00 03
00:00:00:9989 Rx 1 0x110 s 3 00 00 03
00:00:00:9980 Rx 1 0x110 s 3 00 00 03
00:00:00:9989 Rx 1 0x110 s 3 00 00 03
00:00:00:9979 Rx 1 0x110 s 3 00 00 03
00:00:00:9989 Rx 1 0x110 s 3 00 00 03
00:00:00:9980 Rx 1 0x110 s 3 00 00 03
46
DEMO MANUAL DC2732A
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APPENDIX B: CAN BASED EVALUATION
00:00:00:9988 Rx 1 0x110 s 3 00 00 03
00:00:00:9980 Rx 1 0x110 s 3 00 00 03
00:00:00:9989 Rx 1 0x110 s 3 00 00 03
00:00:00:9989 Rx 1 0x110 s 3 00 00 03
00:00:00:6957 Tx 1 0x11D s 0
00:00:00:0033 Rx 1 0x11C s 8 00 80 00 00 65 FF 3C 02
00:00:00:2989 Rx 1 0x110 s 3 00 00 03
00:00:00:9990 Rx 1 0x110 s 3 00 00 03
00:00:00:9979 Rx 1 0x110 s 3 00 00 03
00:00:00:9989 Rx 1 0x110 s 3 00 00 02
00:00:00:9979 Rx 1 0x110 s 3 00 00 03
00:00:00:9989 Rx 1 0x110 s 3 00 00 03
00:00:00:9990 Rx 1 0x110 s 3 00 00 03
00:00:00:9979 Rx 1 0x110 s 3 00 00 03
00:00:00:9989 Rx 1 0x110 s 3 00 00 02
00:00:00:9980 Rx 1 0x110 s 3 00 00 04
00:00:00:9988 Rx 1 0x110 s 3 00 00 03
00:00:00:9980 Rx 1 0x110 s 3 00 00 03
00:00:00:9989 Rx 1 0x110 s 3 00 00 03
00:00:00:9979 Rx 1 0x110 s 3 00 00 03
00:00:00:9989 Rx 1 0x110 s 3 00 00 03
00:00:00:8610 Tx 1 0x11F s 8 86 01 73 74 01 00 0A 01
00:01:58:4164 Tx 1 0x117 s 3 00 00 10
00:00:00:0385 Rx 1 0x117 s 6 04 00 00 00 00 03
00:00:00:0004 Rx 1 0x117 s 8 02 00 F4 0F 00 00 00 00
00:00:00:0004 Rx 1 0x117 s 8 00 00 4F C2 00 01 58 7B
00:02:00:0434 Tx 1 0x117 s 6 84 00 00 00 00 00
00:00:01:8720 Tx 1 0x117 s 8 82 00 00 00 00 00 00 00
00:00:01:5680 Tx 1 0x117 s 8 80 00 00 00 00 00 00 00
00:00:00:0493 Rx 1 0x117 s 4 00 00 10 00
00:00:09:9925 Tx 1 0x117 s 3 00 00 10
00:00:00:0279 Rx 1 0x117 s 6 04 00 00 00 00 00
00:00:00:0004 Rx 1 0x117 s 8 02 00 00 00 00 00 00 00
00:00:00:0004 Rx 1 0x117 s 8 00 00 00 00 00 00 00 00
***END DATE AND TIME 8:5:2017 15:26:27:342***
***[STOP LOGGING SESSION]***
47
DEMO MANUAL DC2732A
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APPENDIX B: CAN BASED EVALUATION
FAST MEASUREMENT
• Enable Measurement:
00:01:07:2305 Tx 1 0x11F s 8 9E 01 05 05 F5 87 0A 00
• Slow channel measurement results 0
00:00:01:0022 Rx 1 0x110 s 8 FF FF FE 00 00 01 FF EB
00:00:00:0005 Rx 1 0x111 s 8 80 00 00 80 00 00 00 7B
00:00:00:0010 Rx 1 0x112 s 8 80 00 0A 75 1F 06 09 76
00:00:00:0003 Rx 1 0x113 s 2 00 71
• Slow channel measurement results 1
00:00:00:9980 Rx 1 0x110 s 8 FF FF FE 00 00 00 FF EB
00:00:00:0005 Rx 1 0x111 s 8 80 00 00 80 00 00 00 7B
00:00:00:0010 Rx 1 0x112 s 8 80 00 0A 75 1F 06 09 76
00:00:00:0004 Rx 1 0x113 s 2 00 71
• Slow channel measurement results 2
00:00:00:9979 Rx 1 0x110 s 8 FF FF FE 00 00 01 FF EB
00:00:00:0005 Rx 1 0x111 s 8 80 00 00 80 00 00 00 7B
00:00:00:0010 Rx 1 0x112 s 8 80 00 0A 75 1F 06 09 76
00:00:00:0004 Rx 1 0x113 s 2 00 71
o .... (repeated every second)
• Enable report of fast channel (I2, BAT, AUX every 50ms)
00:00:00:7683 Tx 1 0x11D s 3 00 50 32
• Fast channel FIFO samples I2 report:
00:00:00:0128 Rx 1 0x119 s 8 00 00 FF FF FF FF FF FF
00:00:00:0004 Rx 1 0x119 s 8 FF FF FF FF FF FF 00 00
00:00:00:0004 Rx 1 0x119 s 8 00 00 00 00 FF FF 00 00
00:00:00:0004 Rx 1 0x119 s 8 00 00 00 00 00 00 00 00
00:00:00:0004 Rx 1 0x119 s 8 01 00 01 00 01 00 01 00
00:00:00:0005 Rx 1 0x119 s 8 01 00 01 00 00 00 00 00
00:00:00:0004 Rx 1 0x119 s 8 01 00 00 00 00 00 01 00
00:00:00:0004 Rx 1 0x119 s 8 02 00 01 00 01 00 02 00
00:00:00:0004 Rx 1 0x119 s 8 01 00 01 00 01 00 02 00
00:00:00:0004 Rx 1 0x119 s 8 02 00 02 00 02 00 02 00
00:00:00:0004 Rx 1 0x119 s 8 02 00 02 00 02 00 02 00
00:00:00:0004 Rx 1 0x119 s 8 02 00 03 00 02 00 02 00
00:00:00:0004 Rx 1 0x119 s 8 02 00 02 00 02 00 02 00
00:00:00:0004 Rx 1 0x119 s 8 02 00 01 00 01 00 02 00
00:00:00:0004 Rx 1 0x119 s 8 01 00 01 00 02 00 02 00
00:00:00:0004 Rx 1 0x119 s 8 01 00 02 00 01 00 01 00
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APPENDIX B: CAN BASED EVALUATION
00:00:00:0004 Rx 1 0x119 s 8 01 00 00 00 01 00 00 00
00:00:00:0004 Rx 1 0x119 s 8 01 00 00 00 00 00 00 00
00:00:00:0004 Rx 1 0x119 s 8 00 00 00 00 00 00 FF FF
00:00:00:0004 Rx 1 0x119 s 8 FF FF 00 00 00 00 FF FF
• Fast channel average measurement results I2:
00:00:00:0003 Rx 1 0x121 s 6 19 03 00 00 50 00
• Fast channel FIFO samples BAT report:
00:00:00:0115 Rx 1 0x11A s 8 EE FF EE FF EE FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EE FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EE FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EF FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EE FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EE FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EE FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EF FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EE FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EE FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EE FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EE FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EE FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EE FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EE FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EE FF EF FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EF FF EE FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EE FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EF FF EE FF EE FF
00:00:00:0004 Rx 1 0x11A s 8 EE FF EE FF EE FF EE FF
• Fast channel average measurement results BAT:
00:00:00:0004 Rx 1 0x122 s 6 00 00 00 80 50 00
• Fast channel FIFO samples AUX report:
00:00:00:0114 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 79 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
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APPENDIX B: CAN BASED EVALUATION
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
00:00:00:0004 Rx 1 0x11B s 8 78 0A 78 0A 78 0A 78 0A
• Fast channel average measurement results AUX:
00:00:00:0004 Rx 1 0x123 s 6 0C E0 29 00 50 00
(FIFO samples are reported only once, afterwards the average of FIFO samples is reported at the given cycle time)
• Fast channel average measurement results 0 (0x121: I2, 0x122: BAT, 0x123: AUX)
00:00:00:0596 Rx 1 0x121 s 6 41 00 00 00 3F 00
00:00:00:0111 Rx 1 0x122 s 6 00 00 00 80 4B 00
00:00:00:0116 Rx 1 0x123 s 6 CC E1 29 00 50 00
• Fast channel average measurement results 1 (0x121: I2, 0x122: BAT, 0x123: AUX)
00:00:00:0277 Rx 1 0x121 s 6 30 06 00 00 40 00
00:00:00:0095 Rx 1 0x122 s 6 00 00 00 80 40 00
00:00:00:0105 Rx 1 0x123 s 6 24 E2 29 00 47 00
• Fast channel average measurement results 2 (0x121: I2, 0x122: BAT, 0x123: AUX)
00:00:00:0300 Rx 1 0x121 s 6 00 00 00 80 3F 00
00:00:00:0095 Rx 1 0x122 s 6 00 00 00 80 40 00
00:00:00:0096 Rx 1 0x123 s 6 20 E3 29 00 40 00
• Slow channel measurement results.
00:00:00:0019 Rx 1 0x110 s 8 00 00 03 00 00 01 FF EB
00:00:00:0005 Rx 1 0x111 s 8 80 00 00 80 00 00 00 7B
00:00:00:0011 Rx 1 0x112 s 8 80 00 0A 75 1F 06 09 76
00:00:00:0003 Rx 1 0x113 s 2 00 71
• Fast channel average measurement results 3 (0x121: I2, 0x122: BAT, 0x123: AUX)
00:00:00:0273 Rx 1 0x121 s 6 A0 04 00 00 40 00
00:00:00:0096 Rx 1 0x122 s 6 00 00 00 80 40 00
00:00:00:0096 Rx 1 0x123 s 6 10 E3 29 00 40 00
...
• Enable report of fast channel (I2, BAT, AUX every 1ms)
00:00:00:0065 Tx 1 0x11D s 3 00 50 01
...
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APPENDIX B: CAN BASED EVALUATION
• Fast channel last sample report (every 1ms to 2ms):
00:00:00:0024 Rx 1 0x11C s 8 00 00 02 00 F0 FF 7A 0A
00:00:00:0016 Rx 1 0x11C s 8 00 00 02 00 F0 FF 7A 0A
00:00:00:0018 Rx 1 0x11C s 8 00 00 02 00 F0 FF 7A 0A
00:00:00:0014 Rx 1 0x11C s 8 00 00 02 00 F0 FF 7A 0A
00:00:00:0010 Rx 1 0x11C s 8 00 00 03 00 EF FF 7A 0A
00:00:00:0017 Rx 1 0x11C s 8 00 00 03 00 F0 FF 7A 0A
...
• Stop measurement
00:00:00:0006 Tx 1 0x11F s 8 9E 01 05 05 F5 07 0A 00
SERIAL MONITOR VIA LINDUINO’S USB PORT
The serial monitor is not necessary for operation but can give additional debug information and allows to change the
CAN bus baud rate.
The serial terminal baud rate must be set to 1000000 and the newline termination must be set to “Both NL & CR”. See
Arduino IDE’s Serial Monitor screenshot as an example.
Note: In case Arduino DUE is used, the max. supported baud rate is 250000.
Figure53. Arduino IDE’s Serial Monitor
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Table7. Serial Monitor Command Overview
CMD DESCRIPTION
RST Reset the LTC2949
INT<CS, BR> Assign chip select pin to the CAN controller (must be 9 for the DC2617A) and set the CAN baud rate.
For example:
> INT9,500000
INT:9,500000
T<ms> Configure the CAN message send period in milliseconds. (Equivalent to MEAS_PERIOD•100 which
is configured via CAN message CFG2949)
WK Wakeup LTC2949, read and clear status, alerts and faults registers. This is done automatically with
CAN message CFG2949.
Typical output:
> WK
WK:OK
STAT:0x0F0000000000000000,OK
OK
PA0:OK
PA1:OK
0x….: Content of status and alert registers in the order of their addresses as hexadecimal string
(first two characters are the content of the STATUS register; last two characters are the content of
the FAULTS register)
DB<Val> Val = 0: Disable debug output (default)
Val = 1: Enable debug output (default)
Enabled debug output of LTC2949’s SPI communication. Attention: If enabled this will drastically
impact operation timing due to processing time needed to generate the debug output and send it via
the serial monitor. Certain functions may not work as expected.
Note:
After a reset of the Linduino the DC2732A_CAN will send the following message via the serial COM port: INT:9,500000 which is the default setting for the
CAN controller (CS-Pin = 9, 500kBit/s)
APPENDIX B: CAN BASED EVALUATIONAPPENDIX B: CAN BASED EVALUATION
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APPENDIX C: ISOLATION MEASUREMENT WITH LTC2949
RESISTIVE DIVIDER EQUATION
DEFINITIONS
The equations to calculate the isolation fault resistors Riso+ and Riso- depending on two chassis-GND meas-urements
VxI and VxII and two battery stack voltage measurements VBATI and VBATII for the two cases ‘switch open’ (I) and
‘switch closed’ (II) are derived as following.
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CALCULATE YISO– FROM CASE II:
SIMULATION WITH SWITCH LEAKAGE ERROR
Table: Error of Isolation Resistance Measurement (IDSS = 10μA, Rd = 38k)
Error of Riso– Measurement Error of Riso+ Measurement
2.50E+05 1.00E+06 5.00E+06 1.00E+07 2.50E+05 1.00E+06 5.00E+06 1.00E+07
2.50E+05 –2% –2% –3% –3% 2.50E+05 –3% –2% –2% –2%
1.00E+06 –2% –2% –2% –2% 1.00E+06 –3% –3% –3% –3%
5.00E+06 –2% –2% –2% –2% 5.00E+06 –6% –5% –5% –5%
1.00E+07 –2% –2% –2% –2% 1.00E+07 –10% –9% –8% –8%
Table: Error of Isolation Resistance Measurement (IDSS = 50μA, Rd = 10k)
Error of Riso– Measurement Error of Riso+ Measurement
Riso± 2.50E+05 1.00E+06 5.00E+06 1.00E+07 Riso± 2.50E+05 1.00E+06 5.00E+06 1.00E+07
2.50E+05 –10% –10% –10% –10% 2.50E+05 –10% –9% –10% –11%
1.00E+06 –12% –11% –11% –11% 1.00E+06 –9% –8% –8% –9%
5.00E+06 –23% –21% –21% –21% 5.00E+06 –8% –8% –8% –8%
1.00E+07 –33% –31% –31% –31% 1.00E+07 –8% –8% –8% –8%
For more details please contact Analog Devices.
VxI
BAT
V1I
VxII
V1II
BAT1
{BAT}
Riso+
{Risp}
Riso–
{Risn}
Ra
{Rp*(1-p)}
Rb
{Rp*p}
Rc
{Rn*(1-n)}
Rd
{Rn*n}
Riso1+
{Risp}
Riso1–
{Risn}
Ra1
{Rp*(1-p)}
Rb1
{Rp*p}
Rc1
{Rn*(1-n)}
Rd1
{Rn*n}
{BAT}
TBL(0 0 1000 {IDSS})
I1
Chassis
Chassis
Switch closed
Switch open
Note: Typical Rn = Rp, p = 0.5. Due to tolerances the real values might
be different and could be calibrated as shown in the example values above.
IDSS: MOSFET Zero gate voltage drain current (VGS = 0), e.g. STD4NK100Z 50μA@125dC
Opt. Switch Leakage
APPENDIX D: MEASURE HALL SENSOR WITH DC2732A_BASIC
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APPENDIX D: MEASURE HALL SENSOR WITH DC2732A_BASIC
For easy evaluation without changing the Linduino sketch, the external sensor (e.g., hall sensor) could be connected
to the BAT (BATP-BATM) input of the demoboard.
tDut,I1,P1,BAT,Tntc,TIC,fI2,fBAT,fifoCnt,fifoI2Avg,fifoBATAvg,OK/ERR
Measurements of BAT are reported twice by DC2732A_BASIC. BAT is from the slow channel, fBAT is from the fast
channel (average of 128 samples). As also the current is reported from the fast channel as average of 128 samples,
it is reasonable to compare fBAT and fI2 for evaluation of LTC2949’s current channel and compare it to a hall sensor.
Alternatively, the Sketch can be changed to measure also SLOT2 and configure this slot to measure the hall sensor volt-
age output e.g., on V3(hall+)-V4(hall-). Within DC2732A_BASIC.ino search for following code and comment “#undef
ADD_SLOT2_MEASUREMENT” as shown here.
// enable measurement of Vx-Vy via SLOT2
#define ADD_SLOT2_MEASUREMENT
// disable measurement of Vx-Vy via SLOT2
//#undef ADD_SLOT2_MEASUREMENT
#define SLOT2_MEAS_POS 3
#define SLOT2_MEAS_NEG 4
As default now also SLOT2 measurement is reported. See also CSV header:
tDut,I1,P1,BAT,Tntc,S2,TIC,fI2,fBAT,fifoCnt,fifoI2Avg,fifoBATAvg,OK/ERR
S2 is the report of slot2 in volts.
Example output:
tDut,I1,P1,BAT,Tntc,S2,TIC,fI2,fBAT,fifoCnt,fifoI2Avg,fifoBATAvg,OK/ERR
STAT:0x10000000000000000000,OK
STAT:0x10000000000000000000,OK
6499,0.010881,0.013448,1.236,26.2,0.5966,27.6,0.00336,1.235,132,0.008124,1.236,OK
99,0.002108,0.002609,1.234,26.2,0.1725,27.6,0.00014,1.233,126,0.000994,1.234,OK
99,0.001046,0.001296,1.233,26.2,0.0030,27.6,0.00526,1.232,127,0.002169,1.233,OK
99,0.008098,0.009969,1.231,26.2,0.1714,27.6,0.01690,1.230,126,0.010967,1.231,OK
99,0.020582,0.025308,1.229,26.2,0.6131,27.6,0.03084,1.228,129,0.024189,1.229,OK
99,0.033752,0.041447,1.228,26.2,1.1603,27.6,0.04123,1.227,126,0.036727,1.228,OK
99,0.042602,0.052245,1.226,26.2,1.6050,27.6,0.04466,1.225,129,0.043759,1.226,OK
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APPENDIX E: SYNCHRONOUS MEASUREMENTS WITH CELL MONITORS
AND LTC2949
The LTC2949 GUI also supports synchronous measurements of cell voltages via cell monitors LTC68xx together with
current, voltage measurements by LTC2949:
1. Click Connect.
a.
2. Select number of cell monitors, cells per cell monitor, topology of the isoSPI bus (LTC2949 on top of the daisy
chain or parallel to the bottom of the daisy chain) and the CS (chip select) line. The latter can be set to Aux to use
the AUX channel of the dual LTC6820 isoSPI board (DC2792). In most other cases it will be set to Main.
a.
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APPENDIX E: SYNCHRONOUS MEASUREMENTS WITH CELL MONITORS
AND LTC2949
3. Click Connect.
a.
b. Note: Keep in mind to disable the termination resistor on DC2732A (JP1) in case LTC2949 is connected in parallel
to an isoSPI bus.
4. Adjust GUI Layout optimized for Cell Monitor integration (click on GUI Cell Monitor Layout within Expert
Commandswindow).
a.
5. Configure fast voltage and current measurements of LTC2949.
a. Enable P2 as Voltage.
b.
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7. Enable “Register Auto Read” to Get Measurement Results.
a.
8. Click on “Clear A… T… Plots” to Clear the Plots and Start Over at Time = 0.
a.
9. Right Click in Any Plot Window and Select “Zoom All Plots” → “Zoom Fit All” to See the Plotted Results.
a.
10. Right Click in Any Plot Window and Select More Channels to View:
a.
APPENDIX E: SYNCHRONOUS MEASUREMENTS WITH CELL MONITORS
AND LTC2949
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APPENDIX F: GUI TROUBLESHOOTING & LINDUINO PROGRAMMING
The latest LTC2949 GUI version is distributed with Analog Devices QuikEval software.
For QuikEval to be able to detect the DC2732A, the demoboard must be configure to SPI mode (JP3–JP6) and connect
to the Linduino via the 14-pin flat ribbon cable.
After that plug the Linduino’s USB cable to the PC and launch QuikEval. It should detect the board and ask to download
and install the LTC2949 GUI software. SPI mode is only mandatory for QuikEval to detect the board. Afterwards, isoSPI
mode can be used again with the LTC2949 GUI (but the GUI must be launched manually from the Windows start menu,
as QuikEval will not identify LTC2949 demoboard when connected via isoSPI, e.g., with LTC6820 demoboard, to the PC).
Alternatively, the GUI can be downloaded directly from:
LTC2949 GUI Tools & Simulations
Both files must be place in one local folder and then setup2949.exe must be executed (depending on the operating
system settings, the context menu command “Run Elevated” must be used).
The LTC2949 GUI expects the Linduino to be loaded with the DC590B Sketch (factory default). If the GUI does never
connect, very likely the Linduino is programmed with the wrong Sketch. Please make sure the DC590B sketch is pro-
grammed (factory default of the Linduino).
The green LED on the DC2732A (LTC2949 demoboard) indicates, there was/is communication to LTC2949, it’s in IDLE
and not in sleep mode.
To check, that the hardware setup is fine, another sketch for LTC2949 can be programmed. All the Linduino sketches
for LTC2949 can be found in:
LinduinoSketchbook2949.zip, provided by Analog Devices.
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APPENDIX F: GUI TROUBLESHOOTING & LINDUINO PROGRAMMING
Click on the Serial Monitor Icon, make sure Serial Monitor is set to 1000000 baud.
Note: In case Arduino DUE is used, the max. supported baud rate is 250000.
See output:
If the output is like above screenshot, without any message “…ERR…” the hardware works fine. Now the Linduino
can be program again with the DC590B sketch to use the LTC2949-GUI.
1. Open DC590B.
a.
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APPENDIX G: LOG MEASUREMENTS WITH TERA TERM
Most of the DC2732A example Sketches, for example, the DC2732A_BASIC Sketch, send the measurement data via
the serial monitor to the PC. Any serial terminal software can be used to record this data. For example, the open source
tool Tera Term and its log feature can be used as described here.
LOG MEASUREMENT DATA FROM DC2732A_BASIC TO TEXT/.CSV – FILE
1. Download Tera Term.
2. Start Tera Term.
a.
3. Select right com port (close the serial monitor of the Arduino IDE before!)
a.
4. Set the right baud rate (check .ino file for baud rate setting).
a.
b.
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7. Choose a file name (it is recommended to use the ending .csv, for easy opening the file with excel…)
8. Click save. All data is now stored to a file. To show the status of the log go to File → “Show Log dialog…”
a.
The file could now be opened in a text editor or in excel. If the file ending .csv was used, the file can be easily opened
in excel with a double click.
APPENDIX G: LOG MEASUREMENTS WITH TERA TERM
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The following gives an overview and description of the low level communication functions available in the LTC2949
C-Code library LTC2949.cpp/.h (within Sketchbook folder: LTSketchbook\libraries\LTC2949).
1. Configure library for communication topology (top of daisy chain or parallel to daisy chain/single device).
LTC2949_init_lib(
/*byte cellMonitorCount, */LTCDEF_CELL_MONITOR_COUNT,
/*boolean ltc2949onTopOfDaisychain, */false,
/*boolean debugEnable */false
);
2. Set library to default settings of LTC2949 after power-up (library mirrors some of LTC2949’s register settings to
calculate e.g., charge/energy/time LSB sizes, SLOT LSB which can be temperature or voltage, power ADC settings
which can be power of voltage…).
LTC2949_init_device_state();
3. WRITE single byte.
LTC2949_WRITE(LTC2949_REG_WKUPACK, 0x00); // write wake up acknowledge
// is Equal to
byte data = 0;
LTC2949_WRITE(LTC2949_REG_WKUPACK, 1, &data);
4. WRITE burst of bytes.
void LTC2949_SlotsCfg(byte slot1P, byte slot1N, byte slot2P, byte slot2N)
{
byte data[4] = { slot1N, slot1P, slot2N, slot2P };
LTC2949_WRITE(LTC2949_REG_SLOT1MUXN, 4, data);
}
5. READ single byte
byte data;
byte error = LTC2949_READ(LTC2949_REG_FACTRL, 1, &data);
6. READ burst of bytes
byte LTC2949_GetSlotsCfg(byte * slot1P, byte * slot1N, byte * slot2P, byte * slot2N)
{
byte data[4];
byte error = LTC2949_READ(LTC2949_REG_SLOT1MUXN, 4, data);
*slot1N = data[0];
*slot1P = data[1];
*slot2N = data[2];
*slot2P = data[3];
return error;
}
APPENDIX H: LTC2949.CPP/.H BASIC LIBRARY FUNCTIONS
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Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications
subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
7. Check EEPROM control and status register, make sure to be in the initial state
byte error = LTC2949_EEPROMIsReady()
8. Initialize EEPROM
byte error = LTC2949_EEPROMCommand(LTC2949_BM_EEPROM_INIT)
9. Check if EEPROM was initialized correctly
byte error = LTC2949_EEPROMCommand(LTC2949_BM_EEPROM_CHECK)
10. Store LTC2949 memory to EEPROM
byte error = LTC2949_EEPROMCommand(LTC2949_BM_EEPROM_SAVE)
11. Restore LTC2949 memory from EEPROM
byte error = LTC2949_EEPROMCommand(LTC2949_BM_EEPROM_RESTORE)
12. EEPROM access, higher level functions
13. All-in-one EEPROM read (do all checks and restore from EEPROM)
byte error = LTC2949_EEPROMRead()
14. All-in-one EEPROM write (Initialize, check and write to EEPROM)
byte error = LTC2949_EEPROMWrite()
15. Initialize only and check EEPROM (checks if EEPROM is connected and write is possible, but does not write any
of LTC2949’s configuration)
byte error = LTC2949_EEPROMInitCheck()
Most functions LTC2949_ typically return an error code. Return value is 0
.in case of no error.
Most functions LTC2949_ typically return an error code. Return value is 0 in case of no error.
APPENDIX H: LTC2949.CPP/.H BASIC LIBRARY FUNCTIONS
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ANALOG DEVICES, INC. 2020
02/20
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ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection
circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
Legal Terms and Conditions
By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and
conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation
Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”)
and Analog Devices, Inc. (“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to
Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and
agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted
is expressly made subject to the following additional limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third
Party to access the Evaluation Board. As used herein, the term “Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is
NOT sold to Customer; all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all
be considered the confidential and proprietary information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of
use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile
or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited
to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS
Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF
LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY
DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS
LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING
BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE
HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable United States
federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts
(excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits
to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed.
