Kevin O'Connor 9f2a025762 bltouch: Don't assume reset will do a pin_up in test_sensor() ...

Some clones don't raise the pin on a reset and the ANTClabs BL-Touch
sometimes doesn't raise the pin either.

Rework the (infrequently called) sensor test code to always issue a
pin_up command before the touch command.  Also, perform a reset and
retry if the sensor test fails.

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

2020-04-02 08:25:22 -04:00

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