GNS 202/902(B) StarterKit
manual
confidential information manual
© GNS-GmbH 2014
V 0.2, Oct 24th 2014
1
The GNS 202/902 Starter Kit has been designed to support developers during
design-in of the GNS 202/902(B) module family.
GNS Global Navigation Systems GmbH
Adenauerstrasse 18
D – 52146 Würselen
Germany
www.gns-gmbh.com
info@gns-gmbh.com
GNS 202/902(B) StarterKit
manual
confidential information manual
© GNS-GmbH 2014
V 0.2, Oct 24th 2014
2
Introduction
This manual shows, how to connect the GNS 202/902 Starter Kit to a PC in order to verify GNS
202/902 module performance and test supported features. Connected to a PC, all NMEA data is
routed to the miniUSB port.
All documents which are highlighted in bold letters, are available for download at the GNS forum:
http://www.forum.gns-gmbh.com/ or from our website www.gns-gmbh.com
For technical module specification, please refer to the GNS 202 or 902 (B) datasheets.
For receiver configuration programming via NMEA command interface and getting more information
about the command parameters, please refer to NMEA_Interface_manual_MTK_Vx
Important note :
This manual covers all versions of GNS 202 and 902 GNSS receivers.
The following versions are available :
GNS 202 : ROM based GPS all- in one receiver
GNS902 : Flash based GNSS receiver fot concurrent reception of GPS and Glonass
GNS902B : Flash based GNSS receiver fot concurrent reception of GPS and Beidou
Whenever needed for clarity, the type of referenced module is mentioned in the text.
GNS 202/902 Starter Kit Features
On board USB2UART bridge for PC connection
5V DC input via mini USB
LED fix indicator
Access to 202/902 module pins for evaluation and system integration purpose
GNS 202/902(B) StarterKit
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© GNS-GmbH 2014
V 0.2, Oct 24th 2014
3
Index
Introduction ............................................................................................................................ 2
1 Description of the GNS 202/902 StarterKit Hardware .......................................................... 4
2 GNS 202/902 StarterKit Board Layout ................................................................................. 5
3 GNS 202/902 StarterKit Board Block Diagram ..................................................................... 6
3.1 Getting started …. .......................................................................................................... 7
4 GNS 202/902 configuration ................................................................................................. 9
4.1 Checksum Calculation ..................................................................................................... 9
5 GNS 202/902 StarterKit Hardware ..................................................................................... 10
5.1 Assembly Drawing Top Side .......................................................................................... 10
5.2 GNS 202/902 StarterKit Schematic page1/2 ................................................................... 11
5.3 PCB Layout TOP/BOTTOM Layer ..................................................................................... 12
6 ORDERING INFORMATION ................................................................................................. 13
7 RELATED DOCUMENTS ........................................................................................................ 13
8 DOCUMENT REVISION HISTORY ......................................................................................... 13
GNS 202/902(B) StarterKit
manual
confidential information manual
© GNS-GmbH 2014
V 0.2, Oct 24th 2014
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1 Description of the GNS 202/902 StarterKit Hardware
FEATURES
Small evaluation board designed for verification of GNS 202/902 module GPS performance
parameters
Small evaluation board designed for easy implementation to MCU controlled applications
LED fix indicator
PC connection via USB
USB powered
The GNS 202/902 Starter Kit is equipped to provide NMEA data via USB or UART to the application
software.
Package Content
GNS 202/902 Evaluation Board
USB to miniUSB cable
CD with documentation & software
GNS 202/902(B) StarterKit
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2 GNS 202/902 StarterKit Board Layout
Note :
Standard Jumper setting in ready-to-run configuration for USB connected to PC is shown on picture.
Description of LED status indicator:
status LED
GNS202
GNS902
GNS902B
blinking
Position fix found,
tracking
Acquisition, no fix available
Acquisition, no fix available
on
NA
Position fix, tracking mode
Position fix, tracking mode
off
Acquisition, no fix
NA
NA
Serial to USB
chip
RESET
Button
Backup
battery
Mini USB Data
&
+5V DC
Power supply
GNS202/902
antenna
module
LED status
indicator
GNS 202/902(B) StarterKit
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JUMPER AND CONNECTOR DESCRIPTION
CONNECTOR
DEFAULT
SIGNAL
DESCRIPTION
JP1
set
Vcc
This jumper must be connected to DC supply
GNS 202/902. Can be used to evaluate power
consumption.
JP2
set
VBackup
Connects the battery to VBackup, can be
removed to erase data and stop RTC
JP3
open
USB Bridge reset
Resets FTDI USB to serial bridge. Releases uart
pins . Should be set if UART is used
JP4
set
GPS Tx line
Connects GPS Tx to USB bridge . Closed for USB
operation, open if UART should be used. Pin2 is
GPS Tx.
JP5
set
GPS Rx line
Connects GPS Rx to USB bridge . Closed for USB
operation, open if UART should be used. Pin2 is
GPS Rx.
CON1
open
GPS RxB line for RTCM feed
Pin2 is feed in for RTCM data. Pin1 is GND.
Do not short !
CON2
open
Wakeup
TBD . Do not short!
CON3
open
1 PPS output
Pin2 is PPS output, Pin1 is GND. Do never short !
3 GNS 202/902 StarterKit Board Block Diagram
GNS 202/902
module
miniUSB connector
Serial to USB
LDO
5V 3.3V
connectors RF1,
RF2
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3.1 Getting started ….
1. Connect the active GPS/GLONASS antenna to the GNS 202/902 Starter Kit.
2. Insert the included CD into your CD Rom Drive. Change to \Driver folder.
3. Copy the two files from the \Driver folder to a PC folder of your choice.
4. GNS 202/902 Starter Kit will be connected to the PC via a virtual COM-Port with USB.
This conversion is performed by an onboard chip.
Do not connect the USB cable now!
First, please install the FTDI VCP (Virtual Com Port) driver by invoking USB-Driver-
CDM20600.exe.
A DOS window will open and close again after a few seconds when finished.
5. The VCP USB driver is now ready to use.
6. Connect the Starter Kit to your PC by using the USB- to miniUSB cable. This will power up
the Starter Kit (shown by the blinking green LED fix indicator) and establish the active state.
7. You should see a hint on the right lower corner of your PC screen, that a new hardware has
been found and is ready to use.
8. The USB connection will create a new virtual COM Port on your system. To locate this COM
port number (to find out which COM port has been assigned automatically), please open the
device manager:
a. Press the start button
b. Type “device manager” or the appropriate name in your language (for example in
Deutsch : “Geräte-Manager”). Windows will provide a direct link to open the device
manager
c. Alternatively, you find the device manager by pressing the “Windows”-key together
with “pause”. This opens the system overview:
d. On the left side selection menu, please select device manager. (german: “Geräte-
Manager”) . The devoce manager window opens.
9. Open the section ports (“Anschlüsse”).
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The new COM port is listed as an USB Serial Port.
Remember the displayed COM port number.
1. Use a GPS viewer of your choice to visualize the received NMEA data. We recommend to use
VisualGPSView freeware for quick testing. Setting should be made as follows:
- UART Comport number : as indicated above in the device manager
- UART baud rate : 9600
- UART format (should be already default ) 8N1, no handshake
For deeper testing, a special tool from mediatek is available under NDA.
GNS 202/902(B) StarterKit
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4 GNS 202/902 configuration
In all cases, where a UART or USB connection to a PC is available, the GNS 202/902 Starter Kit
offers a comfortable way to reprogram the firmware options or settings using the bidirectional NMEA
command interface.
Note:
Removing the power of the GPS device will effect that any modified setting will be lost
and reset to factory default settings. If the module has backup power supply through
VBACKUP, it will be able to keep the modified setting until the backup power is exhausted.
After selecting the preferred settings or features at the NMEA_Interface_manual_MTK_Vx
document, first the checksum has to be calculated for this command, refer to chapter 5.1 Checksum
Calculation. To execute the $PMTK commands, use a terminal program of your choice (for example
HyperTerminal, HTerm, TerraTerm,… available as part of your WindowsOS or as freeware).
Use the COMport setting as explained under 3.1.
Use the PMTK-Commands attaching the calculated checksum (see 5.1) and the Carriage Return
sequence at the end of each command line. Most terminal programs offer the option to attach Carriage-
Return (use option add CR-LF or similar).
4.1 Checksum Calculation
To execute the a $PMTK command it is required to terminate the command by *<chksum>and a
<CR><LF>. The checksum calculation is simple, just XOR all the bytes between the $ and the * (not
including the delimiters themselves). Then use the hexadecimal ASCII format.
Or use the checksum tool at the \Software\Checksum tool folder, which is available on Starter Kit CD or
at the GNS forum: www.forum.gns-gmbh.com.
Example: $PMTK226,3,30*4<CR><LF>
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5 GNS 202/902 StarterKit Hardware
5.1 Assembly Drawing Top Side
GNS 202/902(B) StarterKit
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5.2 GNS 202/902 StarterKit Schematic page1/2
GNS 202/902(B) StarterKit
manual
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5.3 PCB Layout TOP/BOTTOM Layer
TOP Layer BOTTOM Layer
GNS 202/902(B) StarterKit
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© GNS-GmbH 2014
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6 ORDERING INFORMATION
Type
Part#
Description
GNS 902 StarterKit
4037735105225
Evaluation Board with GNS902 (GPS & GLONASS)
GNS 902B StarterKit
4037735105232
Evaluation Board with GNS902B (GPS & BEIDOU)
GNS 202 StarterKit
4037735105300
Evaluation Board with GNS202 (GPS)
7 RELATED DOCUMENTS
Type
description
Available from
GNS 902(B) data sheet
Data sheet for GNS 902 (B) module
http://www.forum.gns-gmbh.com,
www.gns-gmbh.com
GNS 202data sheet
Data sheet for GNS 202 module
http://www.forum.gns-gmbh.com,
www.gns-gmbh.com
NMEA_Interface_manual_MTK_
Vx.pdf
Detailed description of NMEA commands
for MTK chipsets
http://www.forum.gns-gmbh.com,
www.gns-gmbh.com
8 DOCUMENT REVISION HISTORY
V0.1
07/14/2014
P.Skaliks
initial document
V0.2
Oct 24 2014
P.Skaliks
New version covers 202 and 902
GNS GMBH 2014
THE INFORMATION IN THIS DOCUMENTATION DOES NOT FORM ANY QUOTATION OR CONTRACT. TECHNICAL DATA ARE DUE TO BE CHANGED WITHOUT NOTICE. TECHNICAL RECOMMENDATIONS ARE JUST
FOR REFERENCE.
NO LIABILITY WILL BE ACCEPTED BY THE PUBLISHER FOR ANY CONSEQUENCE OF THIS DOCUMENT'S USE.
REPRODUCTION IN WHOLE OR IN PART IS PROHIBITED WITHOUT THE PRIOR WRITTEN CONSENT OF THE COPYRIGHT OWNER
