Kevin O'Connor 4a8f9407b8 avr: Do not use Idle mode ...

The AVR chips (bizarrely) start an ADC conversion when entering Idle
mode.  This behavior can cause the ADC to be busy when a sample is
required.  Worse, if a series of events cause the cpu to enter and
leave Idle mode with a timing similar to the ADC checking rate then it
can cause the ADC to show as busy for extended periods.  This could
cause high MCU load and possibly lead to a "Rescheduled timer in the
past" shutdown.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

2018-04-28 21:26:42 -04:00

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