Merge pull request #45 from mikeysklar/grayscale4-2in13-bare-6383

2.13" gray4 for ADA bare eInk #6383

Author: BlitzCityDIY

examples/ssd1680_2.13_grayscale_6383.py

@@ -0,0 +1,68 @@
+# SPDX-FileCopyrightText: 2026 Mikey Sklar, written for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+
+"""4-gray grayscale example for the Adafruit 2.13" 250x122 E-Ink Display (#6383).
+
+Ribbon Identifier: FPC-7528B, colstart=8.
+Tested on Adafruit Feather RP2040 ThinkInk.
+"""
+
+import time
+
+import board
+import busio
+import displayio
+from fourwire import FourWire
+
+import adafruit_ssd1680
+
+displayio.release_displays()
+
+spi = busio.SPI(board.EPD_SCK, board.EPD_MOSI)
+display_bus = FourWire(
+    spi,
+    command=board.EPD_DC,
+    chip_select=board.EPD_CS,
+    reset=board.EPD_RESET,
+    baudrate=1000000,
+)
+time.sleep(1)
+
+display = adafruit_ssd1680.SSD1680(
+    display_bus,
+    width=250,
+    height=122,
+    busy_pin=board.EPD_BUSY,
+    rotation=270,
+    colstart=8,
+    vcom=0x1C,
+    custom_lut=adafruit_ssd1680.FPC7519_LUT,
+    grayscale=True,
+)
+
+W, H = 250, 122
+bmp = displayio.Bitmap(W, H, 4)
+pal = displayio.Palette(4)
+pal[0] = 0xFFFFFF  # white
+pal[1] = 0xAAAAAA  # light gray
+pal[2] = 0x555555  # dark gray
+pal[3] = 0x000000  # black
+
+COL = W // 4
+for y in range(H):
+    for x in range(W):
+        bmp[x, y] = min(x // COL, 3)
+
+g = displayio.Group()
+g.append(displayio.TileGrid(bmp, pixel_shader=pal))
+display.root_group = g
+
+print("Refreshing...")
+display.refresh()
+print("Done.")
+
+time.sleep(display.time_to_refresh + 5)
+
+while True:
+    time.sleep(10)