GNS 3301 Starter Kit User Manual

: June 5, 2024
: GNS

GNS 3301 StarterKit manual

confidential information manual

The GNS 3301 Starter Kit has been designed to support developers during in of the GNS 3301 GPS/GLONASS stand alone module solution.
The examples are shown as block diagrams to explain the approaches. Reference Layouts are included whenever needed at the GNS forum Link: www.forum.gns- gmbh.com.

GNS Global Navigation Systems GmbH
Adenauerstrasse 18
D – 52146 Würselen
Germany
www.gns-gmbh.com
info@gns-gmbh.com

Introduction

This manual shows, how to connect the GNS 3301 Starter Kit to a PC in order to verify GNS 3301 module performance and test supported features. Connected to a PC, all GPS/GLONASS data (NMEA) is routed to the miniUSB port. The specific documents and reference layout in Gerber-file format of the GNS 3301 StarterKit are available for download.
All documents which are highlighted in bold letters, are available for download at the GNS forum: http://www.forum.gns-gmbh.com/

For technical module specification, please refer to the GNS 3301 datasheet.

For application information and GPS antenna layout implementation the “ GPS antenna connection” Design Guide is available.

For receiver configuration programming via NMEA command interface and getting more informations about the command parameters, please refer to GPS GLONASS NMEAcommandInterface manual.

GNS 3301 Starter Kit Features

On board USB2UART bridge for PC connection
5V DC input via mini USB
SMA antenna connector for GPS RF In
GPS/GLONASS active antenna, DC supply (3.0V)
LED fix indicator

1 Description of the GNS 3301 StarterKit Hardware

FEATURES

Small evaluation board designed for verification of GNS 3301 module GPS performance parameters
Small evaluation board designed for easy implementation to MCU controlled applications
DC supply via SMA connector
GPS/GLONASS-fix LED indicator
PC connection via USB
USB powered

The GNS 3301 Starter Kit is equipped to provide NMEA GPS data via USB or UART to the application software.

Package Content

GNS 3301 Starter Kit
USB to miniUSB cable
Active GPS/GLONASS antenna (3V DC)
CD with documentation & software

2 GNS 3301 StarterKit Board Layout

Description of LED status indicator:

LED status indicator Comment
blinking GPS/GLONASS engine is in acquisition mode. Almanac- and Ephemeris- data will be received. User position will be calculated.

off User position is calculated (position fix)

JUMPER AND CONNECTOR DESCRIPTION

CONNECTOR

| PIN| SIGNAL|

DESCRIPTION

---|---|---|---

JP11

| 1 &2|

VBat

| This jumper must be connected to DC supply GNS 3301.

JP12

| 1 &2|

GND

| Resets UART2USB bridge

CON1

|

1

|

GND

| Ground

2

|

1PPS

| 1PPS Time Mark Output

3 &5

|

NC

| Not connected

4

|

RXDB

| Serial Data Input for DGPS RTCM data streaming
This pin receives DGPS data of RTCM protocol (TTL level), if not used keep floating.

6

|

TXDB

| Serial Data Output
This is the UART-B transmitter of the module. It is used for customization by firmware. If not used, keep floating.

7

|

GPS_TX

| UART2USB bridge transmitter
Connect pin 7&8 to route TDXA to UART2USB bridge

8

|

TXDA

| Serial Data Output A for NMEA output (TTL)
This is the UART-A transmitter of the module. It outputs GPS information for application.

9

|

GPS_RX

| UART2USB bridge receiver
Connect pin 9&10 to route RDXA to UART2USB bridge

10

|

RXDA

| Serial Data Input A for Firmware update (TTL)
This is the UART-A receiver of the module. It is used to receive commands from system.

3 GNS 3301 StarterKit Board Block Diagram

4 Getting started ….

1. Connect the active GPS/GLONASS antenna to the GNS 3301 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 3301 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 list of Assign the virtual COM-Port number by executing “Windows Start Button” and select “Control panel”.

9. Open the section ports (“Anschlüsse”).

The new COM port is listed as an USB Serial Port.
Remember the displayed COM port number.

10. 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.

5 GNS 3301 configuration

In all cases, where a UART or USB connection to a PC is available, the GNS 3301 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 or coin battery, 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).

5.1 checksum Calculation

To execute the a $PMTK command it is required to terminate the command by and a . 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

6 GNS 3301 StarterKit Hardware

6.1 Assembly Drawing Top Side

6.2 GNS 3301 StarterKit Schematic page1/2

6.3 GNS 3301 StarterKit Schematic page2/2

6.4 PCB Layout TOP/BOTTOM Layer

TOP Layer BOTTOM Layer

7 ORDERING INFORMATION

Ordering information

8 ENVIRONMENTAL INFORMATION

This product is free of environmental hazardous substances and complies to 2002/95/EC. (RoHS directive).

10 DOCUMENT REVISION HISTORY

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

V 12, jun 12th 2015

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