GNS 902 STARTERKIT - Global Navigation Systems

GNS 202/902(B) StarterKit

manual

confidential information manual

V 0.2, Oct 24th 2014

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

V 0.2, Oct 24th 2014

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

manual

confidential information manual

V 0.2, Oct 24th 2014

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

V 0.2, Oct 24th 2014

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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confidential information manual

V 0.2, Oct 24th 2014

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

Position fix, tracking mode

off

Acquisition, no fix

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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V 0.2, Oct 24th 2014

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

GNS 202/902(B) StarterKit

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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”).

GNS 202/902(B) StarterKit

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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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V 0.2, Oct 24th 2014

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>

GNS 202/902(B) StarterKit

manual

confidential information manual

V 0.2, Oct 24th 2014

5 GNS 202/902 StarterKit Hardware

5.1 Assembly Drawing Top Side

GNS 202/902(B) StarterKit

manual

confidential information manual

V 0.2, Oct 24th 2014

5.2 GNS 202/902 StarterKit Schematic page1/2

GNS 202/902(B) StarterKit

manual

confidential information manual

V 0.2, Oct 24th 2014

5.3 PCB Layout TOP/BOTTOM Layer

TOP Layer BOTTOM Layer

GNS 202/902(B) StarterKit

manual

confidential information manual

V 0.2, Oct 24th 2014

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