Damien George 096adca0c8 stm32/pin: Decrease machine_pin_obj_t.pin width from 5 to 4 bits. ...

Compiling using arm-none-eabi-gcc 14.1.0 with -O2 will give warnings about
possible overflow indexing extint arrays, such as `pyb_extint_callback`.
This is due to `machine_pin_obj_t.pin` having a bit-width of 5, and so a
possible value up to 31, which is usually larger than
`PYB_EXTI_NUM_VECTORS`.

To fix this, change `machine_pin_obj_t.pin` to a bit-width of 4.  Only 4
bits are needed for ST MCUs, which have up to 16 pins per port.

Signed-off-by: Damien George <damien@micropython.org>

2024-06-27 12:00:20 +10:00

3.1 KiB

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