Heather will happily process any TSIP message that comes in over the serial
port (whether she requested them or not). If they contain any info that can be
displayed, then that info will go to the screen. No assumptions are made
about packet timing, etc. Data gets processed and displayed as it comes in.
Without an outbound serial line to request the misc status messages, the only
data that comes from the tbolt are the "broadcast" messages (primary timing,
secondary timing, satellite selection list and satellite solutions (and those
do not have the satellite position and signal level info). So basically you
lose the az/el/dB info, the alarm status info, the version info, etc
There are couple dozen status messages that get requested (one each second).
To get an idea of what they are check the source file heathgps.cpp Look for
the routine request_misc_msg().
I haven't done any real Linux programming so I don't know what it would take to
do a port. The program only has a few operating system dependent routines.
They all deal with keyboard/screen/mouse/sound/serial port I/O.
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