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Merged
merged 1 commit into from
Aug 13, 2025
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Update ssd1680.py #93

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17 changes: 10 additions & 7 deletions adafruit_epd/ssd1680.py
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Original file line number Diff line number Diff line change
Expand Up @@ -153,7 +153,7 @@ def power_up(self) -> None:
# driver output control
self.command(
_SSD1680_DRIVER_CONTROL,
bytearray([self._height - 1, (self._height - 1) >> 8, 0x00]),
bytearray([(self._height - 1) & 0xFF, (self._height - 1) >> 8, 0x00]),
)
# data entry mode
self.command(_SSD1680_DATA_MODE, bytearray([0x03]))
Expand All @@ -163,20 +163,23 @@ def power_up(self) -> None:
self.command(_SSD1680_GATE_VOLTAGE, bytearray([0x17]))
self.command(_SSD1680_SOURCE_VOLTAGE, bytearray([0x41, 0x00, 0x32]))

height = self._width
if height % 8 != 0:
height += 8 - (height % 8)
# Set ram X start/end postion
self.command(_SSD1680_SET_RAMXPOS, bytearray([0x01, 0x10]))
self.command(_SSD1680_SET_RAMXPOS, bytearray([0x00, (height // 8) - 1]))
# Set ram Y start/end postion
self.command(
_SSD1680_SET_RAMYPOS,
bytearray([0, 0, self._height - 1, (self._height - 1) >> 8]),
bytearray([0x00, 0x00, (self._height - 1) & 0xFF, (self._height - 1) >> 8]),
)
# Set border waveform
self.command(_SSD1680_WRITE_BORDER, bytearray([0x05]))

# Set ram X count
self.command(_SSD1680_SET_RAMXCOUNT, bytearray([0x01]))
self.command(_SSD1680_SET_RAMXCOUNT, bytearray([0x00]))
# Set ram Y count
self.command(_SSD1680_SET_RAMYCOUNT, bytearray([self._height - 1, 0]))
self.command(_SSD1680_SET_RAMYCOUNT, bytearray([0x00, 0x00]))
self.busy_wait()

def power_down(self) -> None:
Expand Down Expand Up @@ -206,9 +209,9 @@ def set_ram_address(self, x: int, y: int) -> None: # noqa: PLR6301, F841
"""Set the RAM address location, not used on this chipset but required by
the superclass"""
# Set RAM X address counter
self.command(_SSD1680_SET_RAMXCOUNT, bytearray([x + 1]))
self.command(_SSD1680_SET_RAMXCOUNT, bytearray([0]))
# Set RAM Y address counter
self.command(_SSD1680_SET_RAMYCOUNT, bytearray([y, y >> 8]))
self.command(_SSD1680_SET_RAMYCOUNT, bytearray([0, 0]))


class Adafruit_SSD1680Z(Adafruit_SSD1680):
Expand Down