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Merge pull request #6863 from jepler/rp2pio-erroneous-mask

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rp2pio: fix occasional bug when not using OUT pins
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Dan Halbert 2022-09-04 09:15:35 -04:00 committed by GitHub
commit 449b43e5a6
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1 changed files with 3 additions and 0 deletions
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ports/raspberrypi/common-hal/rp2pio/StateMachine.c
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@ -369,6 +369,9 @@ bool rp2pio_statemachine_construct(rp2pio_statemachine_obj_t *self,
} }
static uint32_t mask_and_rotate(const mcu_pin_obj_t *first_pin, uint32_t bit_count, uint32_t value) { static uint32_t mask_and_rotate(const mcu_pin_obj_t *first_pin, uint32_t bit_count, uint32_t value) {
if (!first_pin) {
return 0;
}
value = value & ((1 << bit_count) - 1); value = value & ((1 << bit_count) - 1);
uint32_t shift = first_pin->number; uint32_t shift = first_pin->number;
return value << shift | value >> (32 - shift); return value << shift | value >> (32 - shift);