delay_ms.py: Add set method.

Author: peterhinch

v3/docs/TUTORIAL.md

@@ -1249,6 +1249,7 @@ Synchronous methods:
  be assigned, reassigned or disabled at run time.
  7. `deinit` No args. Cancels the running task. See [Object scope](./TUTORIAL.md#44-object-scope).
  8. `clear` No args. Clears the `Event` described in `wait` below.
+ 9. `set` No args. Sets the `Event` described in `wait` below.
 
 Asynchronous method:
  1. `wait` One or more tasks may wait on a `Delay_ms` instance. Pause until the

v3/primitives/delay_ms.py

@@ -27,6 +27,7 @@ def __init__(self, func=None, args=(), duration=1000):
         self._tout = asyncio.Event()  # Timeout event
         self.wait = self._tout.wait  # Allow: await wait_ms.wait()
         self.clear = self._tout.clear
+        self.set = self._tout.set
         self._ttask = self._fake  # Timer task
         self._mtask = asyncio.create_task(self._run()) #Main task
 

v3/primitives/events.py

@@ -6,7 +6,7 @@
 import uasyncio as asyncio
 from . import Delay_ms
 
-# An Event-like class that can wait on an iterable of Event instances.
+# An Event-like class that can wait on an iterable of Event-like instances.
 # .wait pauses until any passed event is set.
 class WaitAny:
     def __init__(self, events):
@@ -32,7 +32,11 @@ async def wt(self, event):
     def event(self):
         return self.trig_event
 
-# An Event-like class that can wait on an iterable of Event instances,
+    def clear(self):
+        for evt in (x for x in self.events if hasattr(x, 'clear')):
+            evt.clear()
+
+# An Event-like class that can wait on an iterable of Event-like instances,
 # .wait pauses until all passed events have been set.
 class WaitAll:
     def __init__(self, events):
@@ -48,6 +52,10 @@ async def wt(event):
             for task in tasks:
                 task.cancel()
 
+    def clear(self):
+        for evt in (x for x in self.events if hasattr(x, 'clear')):
+            evt.clear()
+
 # Minimal switch class having an Event based interface
 class ESwitch:
     debounce_ms = 50
@@ -62,7 +70,7 @@ def __init__(self, pin, lopen=1):  # Default is n/o switch returned to gnd
 
     async def _poll(self, dt):  # Poll the button
         while True:
-            if (s := self._pin() ^ self._lopen) != self._state:
+            if (s := self._pin() ^ self._lopen) != self._state:  # 15μs
                 self._state = s
                 self._of() if s else self._cf()
             await asyncio.sleep_ms(dt)  # Wait out bounce
@@ -80,6 +88,8 @@ def __call__(self):
 
     def deinit(self):
         self._poll.cancel()
+        self.open.clear()
+        self.close.clear()
 
 # Minimal pushbutton class having an Event based interface
 class EButton:
@@ -152,3 +162,5 @@ def __call__(self):
     def deinit(self):
         for task in self._tasks:
             task.cancel()
+        for evt in (self.press, self.double, self.long, self.release):
+            evt.clear()