upcoming shield

Author: ladyada

examples/epd_shieldtest.py

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+# EInk Shield test
+import digitalio
+import busio
+import board
+import time
+from analogio import AnalogIn
+from adafruit_epd.epd import Adafruit_EPD
+from adafruit_epd.il91874 import Adafruit_IL91874
+
+# create the spi device and pins we will need
+spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
+ecs = digitalio.DigitalInOut(board.D10)
+dc = digitalio.DigitalInOut(board.D9)
+srcs = digitalio.DigitalInOut(board.D8)    # can be None to use internal memory
+
+# give them all to our driver
+print("Creating display")
+display = Adafruit_IL91874(176, 264, spi,         # 2.7" Tri-color display
+                          cs_pin=ecs, dc_pin=dc, sramcs_pin=srcs,
+                          rst_pin=None, busy_pin=None)
+
+display.rotation = 1
+
+def read_buttons():
+    with AnalogIn(board.A3) as ain:
+        reading = ain.value / 65535
+        if reading > 0.75:
+            return None
+        if reading > 0.4:
+            return 4
+        if reading > 0.25:
+            return 3
+        if reading > 0.13:
+            return 2
+        return 1
+
+while True:
+    button = read_buttons()
+    if not button:
+        continue
+    print("Button #%d pressed" % button)
+    if button == 1:
+        print("Clear buffer")
+        display.fill(Adafruit_EPD.WHITE)
+        display.display()
+    if button == 2:
+        print("Draw Rectangles")
+        display.fill_rect(5, 5, 10, 10, Adafruit_EPD.RED)
+        display.rect(0, 0, 20, 30, Adafruit_EPD.BLACK)
+        display.display()
+    if button == 3:
+        print("Draw lines")
+        display.line(0, 0, display.width-1, display.height-1, Adafruit_EPD.BLACK)
+        display.line(0, display.height-1, display.width-1, 0, Adafruit_EPD.RED)
+        display.display()
+    if button == 4:
+        print("Draw text")
+        display.text('hello world', 25, 10, Adafruit_EPD.BLACK)
+        display.display()
+    time.sleep(0.01)