User manual

JM3 Engineering Inh. J. Maisel Dobelweg 18, D-85567 Grafing / Munich
Email: [e-mail]
Version: 1.24 Nov 01, 2013 page: 2
3. Connecting to RP6 I/O Extension Board
The picture shows the I/O Extension board with the plugged-in GPS module.
Keep in mind that the distance to the board should be at least 15 -25 mm for best
reception performance.
4. Software
The data access works over I2C Bus (for details on Registers see Chapter 7.0). Max
speed is 400kHz. Standard NMEA0183 messages GGA, RMC, GSA and VTG are
supported which can be read / modified via register access. After startup of the GPS
module you can read default data from the registers, which will be updated after the
first GPS data will be received (approx. 4 sec.).
5. I2C SW Reset
I2CTWI_transmit2Bytes(ADR_GPS_MODULE, 0x00, 0x06);
// SW reset command according to I2C-bus specification and user manual Rev. 5
Standard slave Address is: 0xC8