Kevin O'Connor 5f29787dc7 avrsim: Do IO directly from simulavr callbacks
Don't start/stop the simulavr simulation loop to do IO - instead
implement the IO directly in the serial callback handlers.  This
improves the speed and consistency of the simulation.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
2017-03-24 11:58:32 -04:00
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