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This doesn't check for fine calibration, just makes sure the part is
within the broad tolerances specified by the manufacturer. The subtle fix
here was actually getting reset working -- there was a typo in the
bitpattern definition which caused the reset to fail, making it hard
to self-test the part, as self-test is only valid before the part is running.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Instead of trying to get things into the ring from a variety of
functions, go back to the simpler method of storing them in globals
and having the ADC code just pluck out the most recent values.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Just debug code at this point, will complete on real hardware
Signed-off-by: Keith Packard <keithp@keithp.com>
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