Erik Malund wrote:
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One thing mentioned by others that I feel they did not stress enough is keep interrupt routines short and sweet or you WILL get in trouble.

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Absolutely. High level IO interrupt drivers should be simple grab and stash routines; grab the portion of timely data available, and stash in into a circular buffer then flag foreground or the tasker to take a look at the buffer from a lower priority level and exit.

aka j