Hi Chris and list,
My original goal was to duplicate, more or less, what the PackRat guys
did to get the TruePosition boards up and functional as described here:
<http://www.packratvhf.com/A%20Packrat%20GPS%20Receiver%20Project.pdf>
I did get in touch with them and they forwarded the HEX files. I
haven't tried them yet, but another list member did try them without
success.
I figured, as a learning exercise, I'd program up my own interface. The
boards do not talk NMEA...but output their own format of message. One
message contains GPS time in seconds...plus the number of leap seconds
that have elapsed, so my goal there was to convert the GPS time from the
unit into normal UTC date and time.
On 5/14/2017 12:38 PM, Chris Albertson wrote:
Unless this is an educational exercise I'd move to a different processor.
One of those $3 Arm M3 units has enough memory AND a more standard
development environment that you could use a standard library function to
do what you need.
It is an educational exercise...but I'm still going to look into this.
Another list member suggested a different Arduino board that had two
real serial ports, as right now the Uno board I'm using only has one
hardware serial port with a second duplicated in software. (one port
talks to the TruePosition board...the other is debugging output port)
I did happen to recall that I included a Teensy-LC board (Cortex M0) in
a recent OSHPark PCB order...and it appears to have three hardware
serial ports...so this may be the way I go eventually.
One of the reasons I liked the Uno was due to all the tutorials and
example code floating around...plus the nice selection of libraries...as
I'm not a programmer. My code would probably make a real programmer
lose his or her lunch. :(
thanks much,
ben
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