Provide monitor.init.

Author: peterhinch

v3/as_demos/monitor/README.md

@@ -33,10 +33,13 @@ Example script `quick_test.py` provides a usage example.
 
 An application to be monitored typically has the following setup code:
 ```python
-from monitor import monitor, hog_detect, set_uart
+from monitor import monitor, monitor_init, hog_detect, set_uart
 set_uart(2)  # Define device under test UART no.
 ```
-
+On application start it should issue
+```python
+monitor_init()
+```
 Coroutines to be monitored are prefixed with the `@monitor` decorator:
 ```python
 @monitor(2, 3)

v3/as_demos/monitor/monitor.py

@@ -52,6 +52,9 @@ async def wrapped_coro(*args, **kwargs):
         return wrapped_coro
     return decorator
 
+def monitor_init():
+    uart.write(b'z')
+
 # Optionally run this to show up periods of blocking behaviour
 @monitor(0)
 async def _do_nowt():

v3/as_demos/monitor/monitor_pico.py

@@ -39,9 +39,12 @@ def run(period=100, verbose=[]):
         while not uart.any():
             pass
         x = ord(uart.read(1))
-        #print('got', chr(x)) gets CcAa
         if not 0x40 <= x <= 0x7f:  # Get an initial 0
             continue
+        if x == 0x7a:  # Init: program under test has restarted
+            for w in range(len(pins)):
+                pins[w][1] = 0
+            continue
         if x == 0x40:
             tim.init(period=t_ms, mode=Timer.ONE_SHOT, callback=_cb)
         i = x & 0x1f  # Key: 0x40 (ord('@')) is pin ID 0

v3/as_demos/monitor/monitor_test.py

@@ -1,7 +1,7 @@
 # monitor_test.py
 
 import uasyncio as asyncio
-from monitor import monitor, mon_func, mon_call, set_uart
+from monitor import monitor, monitor_init, mon_func, mon_call, set_uart
 
 set_uart(2)  # Define interface to use
 
@@ -36,6 +36,7 @@ def another_sync_func():
     pass
 
 async def main():
+    monitor_init()
     sync_func()
     with mon_call(22):
         another_sync_func()

v3/as_demos/monitor/quick_test.py

@@ -2,7 +2,7 @@
 
 import uasyncio as asyncio
 import time
-from monitor import monitor, hog_detect, set_uart
+from monitor import monitor, monitor_init, hog_detect, set_uart
 
 set_uart(2)  # Define interface to use
 
@@ -21,6 +21,7 @@ async def bar(t):
 
 
 async def main():
+    monitor_init()
     asyncio.create_task(hog_detect())
     asyncio.create_task(hog())  # Will hog for 500ms after 5 secs
     while True: