mirror of
https://github.com/micropython/micropython.git
synced 2025-09-05 17:30:41 +02:00
d92694c3e8
A long time ago when there was only the `stm` port, Ctrl-C would trigger a preemptive NLR jump to break out of running code. Then in commit124df6f8d0a more general approach to asynchronous `KeyboardInterrupt` exceptions was implemented, and `stmhal` supported both approaches, with the general (soft) interrupt taking priority. Then in commitbc1488a05f`pyboard.py` was updated with a corresponding change to make it issue a double Ctrl-C to break out of any existing code when entering the raw REPL (two Ctrl-C characters were sent in order to more reliably trigger the preemptive NLR jump). No other port has preemptive NLR jumps and so a double Ctrl-C doesn't really behave any differently to a single Ctrl-C: with USB CDC the double Ctrl-C would most likely be in the same USB packet and so processed in the same low-level USB callback, so it's just setting the keyboard interrupt flag twice in a row. The VM/runtime then just sees one keyboard interrupt and acts as though only one Ctrl-C was sent. This commit changes the double Ctrl-C to a single Ctrl-C in `pyboard.py` and `mpremote`. That keeps things as simple as they need to be. Signed-off-by: Damien George <damien@micropython.org>