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Surveyor Robotics Forum › Surveyor Robotics Forum › SRV-1 / SVS Blackfin Hardware
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navigation board (Read 4111 times)

hexagon YaBB Newbies Posts: 10	Re: navigation board Reply #15 - 06/28/10 at 7:14am Hi Is it possible to interface the navigation board to other platforms(microcontrollers, beagle board) other than SRV? Also can you please provide the source code of functions related to navigation board components like gps_head(), gps_dist() etc.? Thanks
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admin YaBB Administrator Posts: 3676	Re: navigation board Reply #16 - 06/28/10 at 8:46am Sure - it's just I2C. You'll find all of the source code here - http://code.google.com/p/surveyor-srv1-firmware/
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hexagon YaBB Newbies Posts: 10	Re: navigation board Reply #17 - 07/02/10 at 4:10am Hi I am trying to take data from the GPS(u-blox LEA 5H) of navigation board onto a microcontroller. Since this gps supports both UBX and NMEA protocols, I would like to know which is the default setting in the navigation board. Also how to change from one protocol to another? Thanks.
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admin

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Re: navigation board
Reply #18 - 07/02/10 at 6:51am

The built-in SRV1 firmware interfaces to uBlox5 via GPS and parses NMEA strings. If you have interfaced via I2C so the SRV-NAV board, the $g console command will give you a data dump of the processed strings, and gps() function in picoC gives you direct access to the data.

If you are not interfacing via I2C, the $g will still autodetect a GPS on UART1 which is set to 9600 baud, though it won't identify it as uBlox.

Look at gps.c in the srv1 firmware code base.

« Last Edit: 07/02/10 at 6:53am by admin »

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hexagon

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Re: navigation board
Reply #19 - 07/05/10 at 6:12am

Hi
I am taking the GPS data(from SRV-navigation board) through usart onto a microcontroller, and printing the strings received onto an LCD screen byte by byte. But some unknown characters are getting printed( 4 horizontal lines one above the other and a character that looks like greek alphabet alpha). Please help me rectify the problem. Does the GPS give proper data indoors?

Thanks,

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admin YaBB Administrator Posts: 3676	Re: navigation board Reply #20 - 07/05/10 at 7:19am We only use the I2C interface in the SRV-1 firmware. GPS sends zeros for position indoors. You'll probably have to look at the ublox5 data sheet.
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hexagon YaBB Newbies Posts: 10	Re: navigation board Reply #21 - 07/05/10 at 8:19am ok, thanks.. i will check the datasheet.
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