NMEA Decoder/Display

A

al99999

Guest
Hi,

Has anybody ever designed anything to decode and display GPS NMEA data
coming out in ascii form from a UART?

Any ideas of where to start or how to go about decoding comma delimted
ascii strings?

Thanks,

Al
 
al99999 wrote:

Hi,

Has anybody ever designed anything to decode and display GPS NMEA data
coming out in ascii form from a UART?

Any ideas of where to start or how to go about decoding comma delimted
ascii strings?
Click to expand...

A micro controller is much better suited
for this type of job

Rene
--
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net
 
al99999 wrote:
Hi,

Has anybody ever designed anything to decode and display GPS NMEA data
coming out in ascii form from a UART?

Any ideas of where to start or how to go about decoding comma delimted
ascii strings?

Thanks,

Al
Click to expand...
NiosII/e CPU, UART, a very small memory for your code, and you're
nearly done - just write some C code that parses the sentences... as I
remember the NMEA format should be easy enough where you can look for
the starting sequence pretty easily to "sync" the CPU; no need for even
a timer peripheral.

If you're comfortable with C coding I'd say this is an afternoon
project; a more in RTL.

Jesse Kempa
jkempa -at- altera -dot- com
 
Thanks for all the advice. I have a Xilinx spartan 3 starter kit that
i'd like to use to implement this, but not EDK. Any suggestions for a
simple CPU to use on the FPGA?

Thanks
 
al99999 wrote:
Thanks for all the advice. I have a Xilinx spartan 3 starter kit that
i'd like to use to implement this, but not EDK. Any suggestions for a
simple CPU to use on the FPGA?

Thanks
Click to expand...
PicoBlaze should handle it if it's not too complex. You may run out
of instruction space (the 8-bit PicoBlaze for Spartan 3 is limited to
1K instructions if memory serves me right). This does not require
the EDK and is published as a reference design with source.

Regards,
Gabor
 
PicoBlaze should handle it if it's not too complex. You may run out
of instruction space (the 8-bit PicoBlaze for Spartan 3 is limited to
1K instructions if memory serves me right). This does not require
the EDK and is published as a reference design with source.
Click to expand...
Is there a C compiler for PicoBlaze?
 
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