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→Exception handling
== Exception handling ==
== Exception handling ==
'''An exception occuring in the ''userloop'' task''' will be captured and will ends the code execution.
'''An exception occurring in the ''userloop'' task''' will be captured and will ends the code execution.
'''Exception occuring in other tasks''' will be only be reported into REPL.
'''Exception occurring in other tasks''' will be only be reported into REPL.
When the code execution ends due to an exception then the {{fname|loop_exception}} contains a reference to the error.
When the code execution ends for other reason (eg: RUN_APP=Stop) then the {{fname|loop_exception}} value is None.
The [https://github.com/mchobby/micropython-mydin/blob/main/examples/din_controlers/common/async-exception.py async-exception.py] test script -visible here below- do raise an exception when the user press the second button (index=1).
<syntaxhighlight lang="python">
from mydin import configure
from mydin.pico import Pico3Mod
from mydin.backplane.relays import TwoRelay3Mod
import time, sys
class KaboomError( Exception ):
pass
# Which Controler + Backplane to use
din = configure( Pico3Mod, TwoRelay3Mod )
async def loop( din ):
for i in range( 4 ): # 0..3 = 4 buttons
if din.was_pressed( i ):
din.leds[i].toggle()
# raise en exception is button 2 is pressed
if i==1:
raise KaboomError( "This exception will exits the code")
din.setup( setup=None, loop=loop )
din.run()
print( "="*40 )
print( "din.run() did exit!!!")
if din.loop_exception != None:
print( "An error %s occured!" % (din.loop_exception.__class__.__name__ ) )
print( "with message: %s" % din.loop_exception )
</syntaxhighlight>
== Activating watchdog ==
== Activating watchdog ==
== Add Scheduler Task ==
== Add Scheduler Task ==