Différences entre versions de « Mydin-advanced-usage »
| Ligne 11 : | Ligne 11 : | ||
When setting the RUN_APP pin to the "Stop" position (so tied to ground) while the MyDin software is already running, the '''code may takes up to 3 seconds to terminates'''. | When setting the RUN_APP pin to the "Stop" position (so tied to ground) while the MyDin software is already running, the '''code may takes up to 3 seconds to terminates'''. | ||
| + | |||
| + | It is also a good practice to check the RUN_APP pin in the {{fname|boot.py}} startup file. This may allows debugging operations when Network operation goes wrong! | ||
| + | |||
| + | |||
| + | <syntaxhighlight lang="python"> | ||
| + | from machine import Pin | ||
| + | RUN_APP = Pin.board.GP3 # High=Run, Low=Stop | ||
| + | |||
| + | if Pin( RUN_APP, Pin.IN, Pin.PULL_UP ).value()==False: | ||
| + | print( '[BOOT] skip execution (RUN_APP is false)' ) | ||
| + | else: | ||
| + | print( '[BOOT] entering...' ) | ||
| + | # >>> PLACE BOOT CODE HERE <<< | ||
| + | print( '[BOOT] exit' ) | ||
| + | </syntaxhighlight> | ||
== Exception handling == | == Exception handling == | ||
Version du 29 avril 2025 à 16:40
Abstract
Before going into the details of the various controlers and backplanes, it may be opportune to learn some advanced behaviors of the MyDin asyncio implementation.
RUN_APP
RUN_APP pin is used to stop the MyDin software stack (or script execution after a reboot).
It is a convenient way to recover the control on the module when script goes wrong. It would also offer the full access to REPL.
When setting the RUN_APP pin to the "Stop" position (so tied to ground) while the MyDin software is already running, the code may takes up to 3 seconds to terminates.
It is also a good practice to check the RUN_APP pin in the boot.py startup file. This may allows debugging operations when Network operation goes wrong!
from machine import Pin
RUN_APP = Pin.board.GP3 # High=Run, Low=Stop
if Pin( RUN_APP, Pin.IN, Pin.PULL_UP ).value()==False:
print( '[BOOT] skip execution (RUN_APP is false)' )
else:
print( '[BOOT] entering...' )
# >>> PLACE BOOT CODE HERE <<<
print( '[BOOT] exit' )
Exception handling
An exception occuring in the userloop task will be captured and will ends the