update uc8179 for tricolor

Author: BlitzCityDIY

adafruit_epd/uc8179.py

@@ -63,13 +63,17 @@ def __init__(
  sramcs_pin: DigitalInOut,
  rst_pin: DigitalInOut,
  busy_pin: DigitalInOut,
+ tri_color: bool = False,
  ) -> None:
  # Adjust height to be divisible by 8 (direct from Arduino)
  if (height % 8) != 0:
  height += 8 - (height % 8)
 
  super().__init__(width, height, spi, cs_pin, dc_pin, sramcs_pin, rst_pin, busy_pin)
 
+ # Store whether this is a tricolor display
+ self._tri_color = tri_color
+
  # Calculate buffer sizes exactly as Arduino does: width * height / 8
  self._buffer1_size = width * height // 8
  self._buffer2_size = self._buffer1_size
@@ -98,14 +102,19 @@ def __init__(
  )
 
  # Set up which frame buffer is which color
- self.set_black_buffer(0, True)
- self.set_color_buffer(1, False)
+ if self._tri_color:
+ self.set_black_buffer(0, False)
+ self.set_color_buffer(1, False)
+ # Tricolor has longer refresh time
+ self.default_refresh_delay = 13 # seconds
+ else:
+ # Monochrome settings
+ self.set_black_buffer(0, True)
+ self.set_color_buffer(1, False)
+ self.default_refresh_delay = 15 # seconds
 
  # UC8179 uses single byte transactions
  self._single_byte_tx = False
-
- # Default refresh delay (from Adafruit_EPD base class in Arduino)
- self.default_refresh_delay = 15 # seconds
  # pylint: enable=too-many-arguments
 
  def begin(self, reset: bool = True) -> None:
@@ -150,8 +159,13 @@ def power_up(self) -> None:
  time.sleep(0.1) # 100ms delay
  self.busy_wait()
 
- # Panel setting
- self.command(_UC8179_PANELSETTING, bytearray([0b011111])) # BW OTP LUT
+ # Panel setting - different for tricolor vs monochrome
+ if self._tri_color:
+ # Tricolor display: 0b000111 (0x07) - Tricolor OTP LUT
+ self.command(_UC8179_PANELSETTING, bytearray([0b000111]))
+ else:
+ # Monochrome display: 0b010111 (0x17) - BW OTP LUT
+ self.command(_UC8179_PANELSETTING, bytearray([0b010111]))
 
  # Resolution setting
  self.command(
@@ -164,8 +178,13 @@ def power_up(self) -> None:
  # Dual SPI setting
  self.command(_UC8179_DUALSPI, bytearray([0x00]))
 
- # VCOM setting
- self.command(_UC8179_WRITE_VCOM, bytearray([0x10, 0x07]))
+ # VCOM setting - different for tricolor
+ if self._tri_color:
+ # Tricolor VCOM setting
+ self.command(_UC8179_WRITE_VCOM, bytearray([0x90, 0x07]))
+ else:
+ # Monochrome VCOM setting
+ self.command(_UC8179_WRITE_VCOM, bytearray([0x10, 0x07]))
 
  # TCON setting
  self.command(_UC8179_TCON, bytearray([0x22]))