Async EPD demos: fix iss peterhinch#66.

DRIVERS.md

@@ -1172,7 +1172,6 @@ needed in more advanced asynchronous applications and their use is discussed in
  modify widgets without risk of display corruption.
  * `complete` Set when display update is complete. It is now safe to call
  `ssd.refresh()`.
- EPD.
 
 ### 5.1.4 Public bound variables
 

gui/demos/epd29_async.py

@@ -19,7 +19,7 @@
 import gui.fonts.arial10 as arial10
 import gui.fonts.font6 as small
 
-ssd._asyn = True  # HACK to make it config agnostic
+# ssd._asyn = True  # HACK to make it config agnostic
 # Some ports don't support uos.urandom.
 # See https://github.com/peterhinch/micropython-samples/tree/master/random
 def xorshift64star(modulo, seed=0xF9AC6BA4):
@@ -94,17 +94,17 @@ async def meter(evt):
 
 async def main():
     refresh(ssd, True)  # Clear display
-    await ssd.wait()
+    await ssd.complete.wait()
     print("Ready")
     evt = asyncio.Event()
     asyncio.create_task(meter(evt))
     asyncio.create_task(multi_fields(evt))
     asyncio.create_task(compass(evt))
     while True:
         # Normal procedure before refresh, but 10s sleep should mean it always returns immediately
-        await ssd.wait()
+        await ssd.complete.wait()
         refresh(ssd)  # Launches ._as_show()
-        await ssd.updated()
+        await ssd.updated.wait()
         # Content has now been shifted out so coros can update
         # framebuffer in background
         evt.set()

gui/demos/epd_async.py

@@ -95,17 +95,17 @@ async def main():
     #    ssd.show()
     #    await ssd.wait()
     refresh(ssd, True)  # Clear display
-    await ssd.wait()
+    await ssd.complete.wait()
     print("Ready")
     evt = asyncio.Event()
     asyncio.create_task(meter(evt))
     asyncio.create_task(multi_fields(evt))
     asyncio.create_task(fields(evt))
     while True:
         # Normal procedure before refresh, but 10s sleep should mean it always returns immediately
-        await ssd.wait()
+        await ssd.complete.wait()
         refresh(ssd)  # Launches ._as_show()
-        await ssd.updated()
+        await ssd.updated.wait()
         # Content has now been shifted out so coros can update
         # framebuffer in background
         evt.set()