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st7796: enable display inversion (INVON) like the st7789 init #11

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st7796: enable display inversion (INVON) like the st7789 init #11

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5 changes: 5 additions & 0 deletions api_drivers/common_api_drivers/display/st7796/_st7796_init.py
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@
_VCMPCTL = const(0xC5)
_PGC = const(0xE0)
_NGC = const(0xE1)
_INVON = const(0x21)
_DISPON = const(0x29)

_EM = const(0xB7)
Expand Down Expand Up @@ -118,6 +119,10 @@ def init(self):

time.sleep_ms(120) # NOQA

# IPS panels are normally-inverted: without INVON the whole display
# renders in negative. The st7789 init does the same.
self.set_params(_INVON)

self.set_params(_DISPON)

time.sleep_ms(120) # NOQA