NMEA

Hi,

Has anybody ever written 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

 

[Hal Murray]

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

Why would you want to do that in VHDL?

How about using VHDL to build a small CPU and then write
the NMEA processing code in your favorite programming language?
(You have to build a compiler too.)

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[Mark McDougall]

Hal Murray wrote:

Why would you want to do that in VHDL?

How about using VHDL to build a small CPU and then write the NMEA
processing code in your favorite programming language? (You have to
build a compiler too.)

I second that!

Regards,
Mark

 

[Vince]

Al,

I can think of several reasons why this may be useful to do in VHDL
especially if the GPS is set to report a single command on startup. I
would stay away from messing with almanacs and ephemeris and possibly
use lookup tables to generate the solution. For example it should be
fairly straight forward to time synchronize your system in this way...
Don't let the software gnomes scare you

I did come across this: http://ralph.bucher.home.att.net/project.html

Let me know how it works out.

-Vince

 

[Mark McDougall]

Vince wrote:

I can think of several reasons why this may be useful to do in VHDL
especially if the GPS is set to report a single command on startup.

Such as?

I did come across this:
http://ralph.bucher.home.att.net/project.html

What does this have to do with decoding and displaying ASCII bitstreams?

Regards,
Mark