Display sleep mode persists after soft reboot

[kalehmann]

Yesterday my pull request #44 that introduces a property for the display sleep mode was merged. Unfortunately after further testing I realized, that the sleep mode persists after a soft reboot of the device. This happens for example when I copy new code to the circuitpython drive.

Steps to reproduce

1. Open a serial connection to the device and enter the REPL
2. Run the following

   from adafruit_macropad import MacroPad
   m = MacroPad()
   m.display_sleep = True

3. Watch the display enter sleep mode
4. Hit Ctrl + D to trigger a soft reboot and enter the REPL again

Expectation

The display wakes up again.

Actual result

The display is still in sleep mode and

>>> from adafruit_macropad import MacroPad
>>> m = MacroPad()
>>> m.display_sleep
False

Workaround

It is still possible to wake up the display manually by always calling

from adafruit_macropad import MacroPad
m = MacroPad()
m.display_sleep = True
m.display_sleep = True

at the beginning of your code. But this is rather ugly because the property needs to be changed twice.

Proposed solution

I did not found a way to query the displays sleep state in the manual. However sending the wake command multiple times to the display seems to have no side effect. Therefore I propose sending the wake command during the initialization of the MacroPad class to ensure the state of the display.

I will provide a pull request for the proposed solution.