8000 zephyr: Allow pins to support both hard and soft interrupts. by danicampora · Pull Request #16916 · micropython/micropython · GitHub
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zephyr: Allow pins to support both hard and soft interrupts. #16916

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zephyr: Allow pins to support both hard and soft interrupts. #16916

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36 changes: 20 additions & 16 deletions ports/zephyr/machine_pin.c
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Original file line number Diff line number Diff line change
Expand Up @@ -63,22 +63,26 @@ void machine_pin_deinit(void) {
static void gpio_callback_handler(const struct device *port, struct gpio_callback *cb, gpio_port_pins_t pins) {
machine_pin_irq_obj_t *irq = CONTAINER_OF(cb, machine_pin_irq_obj_t, callback);

#if MICROPY_STACK_CHECK
// This callback executes in an ISR context so the stack-limit check must be changed to
// use the ISR stack for the duration of this function (so that hard IRQ callbacks work).
char *orig_stack_top = MP_STATE_THREAD(stack_top);
size_t orig_stack_limit = MP_STATE_THREAD(stack_limit);
MP_STATE_THREAD(stack_top) = (void *)&irq;
MP_STATE_THREAD(stack_limit) = CONFIG_ISR_STACK_SIZE - 512;
#endif

mp_irq_handler(&irq->base);

#if MICROPY_STACK_CHECK
// Restore original stack-limit checking values.
MP_STATE_THREAD(stack_top) = orig_stack_top;
MP_STATE_THREAD(stack_limit) = orig_stack_limit;
#endif
if (irq->base.ishard) {
#if MICROPY_STACK_CHECK
// This callback executes in an ISR context so the stack-limit check must be changed to
// use the ISR stack for the duration of this function (so that hard IRQ callbacks work).
char *orig_stack_top = MP_STATE_THREAD(stack_top);
size_t orig_stack_limit = MP_STATE_THREAD(stack_limit);
MP_STATE_THREAD(stack_top) = (void *)&irq;
MP_STATE_THREAD(stack_limit) = CONFIG_ISR_STACK_SIZE - 512;
#endif

mp_irq_handler(&irq->base);

#if MICROPY_STACK_CHECK
// Restore original stack-limit checking values.
MP_STATE_THREAD(stack_top) = orig_stack_top;
MP_STATE_THREAD(stack_limit) = orig_stack_limit;
#endif
} else {
mp_sched_schedule(irq->base.handler, irq->base.parent);
}
}

static void machine_pin_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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