[Ovmsdev] sprintf / crashes

[Michael Balzer]

Mark,

could you please audit & test this?

https://github.com/markwj/Open-Vehicle-Monitoring-System/commit/ad17c2662942536bc391cee282debbfcdd2ae2f5

I've reworked most of the complex sprintf() calls in the net and net_msg 
modules now. I also added a simple crash debug & checkpoint utility to 
be able to measure the effect and possibly narrow down remaining 
occurrences. It seems I've gained a lot of stability, had only two 
watchdog timeouts during the last week, no stack problems at all.

I hesitate to merge into the master because I currently have link / 
connectivity problems, especially during driving. I introduced a GPS 
logging to optimize my antenna positions and managed to get some really 
nice tracks three days ago, so I don't think this is related to my 
changes... but I'm not 100% sure. I tried different antenna positions 
and another GSM network, but the connection keeps dropping when moving 
the car, and GPS position updates need minutes. Could be weather 
conditions ...or some tricky race condition bug?

Thanks,
Michael

-- 
Michael Balzer * Paradestr. 8 * D-42107 Wuppertal
Fon 0202 / 272 2201 * Handy 0176 / 206 989 26

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