Busy wait bug on Inky 13.3 panel

[twfry]

I think there is a bug in file "inky_el133uf1.py", function _busy_wait(), line 266

while self._gpio.get_value(self.busy_pin) == Value.ACTIVE:

with this logic the _busy_wait() function immediately sees the wait as complete and returns. The file inky_e673.py looks to be the same except the same line is:

while not self._gpio.get_value(self.busy_pin) == Value.ACTIVE:

I first noticed this when programs returned immediately after issuing inky.show() and did not wait for the panel to complete refreshing. Changing the inky_el133uf1.py function to use "while not self._gpio.get_value(self.busy_pin) == Value.ACTIVE:" then resulted in busy_wait() functioning correctly and everything waiting until the panel completes.

Note: This is might be a serious bug because with the current logic the final EL133UF1_POF to disable power is not properly sent (or more accurately it is sent while the panel is in the middle of updating and not captured) and so power might be left on the panel without the proper POF being executed to turn off the power driver logic.

[ks-dm]

noticed this as well on a fresh 13.3, however still getting error + display doesnt update even with your fix