Fix bug in epd29.py.

drivers/epaper/epd29.py

@@ -22,7 +22,7 @@ import uasyncio as asyncio
 from micropython import const
 from time import sleep_ms, sleep_us, ticks_ms, ticks_us, ticks_diff
 
-_def asyncio_running():
+def asyncio_running():
     try:
         _ = asyncio.current_task()
     except:

extras/demos/eclock_async.py

@@ -57,5 +57,6 @@ async def test():
 try:
     asyncio.run(test())
 finally:
+    _ = asyncio.new_event_loop()
     if epaper:
         ssd.sleep()

setup_examples/epd29_pico.py

@@ -0,0 +1,44 @@
+# epd29_pico.py Config for Pico with 2.9" ePaper.
+# Customise for your hardware config.
+
+# Released under the MIT License (MIT). See LICENSE.
+# Copyright (c) 2023 Peter Hinch
+
+# Supports Adafruit 2.9" monochrome EPD with interface board connected to Pyboard.
+# Interface breakout: https://www.adafruit.com/product/4224
+# Display: https://www.adafruit.com/product/4262
+
+# Demo of initialisation procedure designed to minimise risk of memory fail
+# when instantiating the frame buffer. The aim is to do this as early as
+# possible before importing other modules.
+
+# WIRING. Adafruit schematic linked on the product web pagerefers to a different
+# device. These are the pins on the physical board.
+# Pico  Breakout
+# Vbus  Vin (1)
+# Gnd   Gnd (3)
+# 4     MISO (no need to connect)
+# 6     SCK (4)
+# 7     MOSI (6)
+# 8     DC (8)
+# 9     RST (10)
+# 10    CS (7)
+# 11    BUSY (11) (Low = Busy)
+
+
+from machine import Pin, SPI
+import gc
+
+from drivers.epaper.epd29 import EPD as SSD
+
+pdc = Pin(8, Pin.OUT, value=0)
+prst = Pin(9, Pin.OUT, value=1)
+pcs = Pin(10, Pin.OUT, value=1)
+pbusy = Pin(11, Pin.IN)
+
+# Baudrate. Adafruit use 1MHz at
+# https://learn.adafruit.com/adafruit-eink-display-breakouts/circuitpython-code-2
+# Datasheet P35 indicates up to 10MHz.
+spi = SPI(0, sck=Pin(6), mosi=Pin(7), miso=Pin(4), baudrate=5_000_000)
+gc.collect()  # Precaution before instantiating framebuf
+ssd = SSD(spi, pcs, pdc, prst, pbusy)  # Create a display instance