// common interrupt handler
STATIC void EXTI_Handler(uint port) {
uint32_t bits = MAP_GPIOIntStatus(port, true);
MAP_GPIOIntClear(port, bits);
// might be that we have more than one pin interrupt pending
// therefore we must loop through all of the 8 possible bits
for (int i = 0; i < 8; i++) {
uint32_t bit = (1 << i);
if (bit & bits) {
pin_obj_t *self = (pin_obj_t *)pin_find_pin_by_port_bit(&pin_board_pins_locals_dict, port, bit);
if (self->irq_trigger == (PYB_PIN_FALLING_EDGE | PYB_PIN_RISING_EDGE)) {
// read the pin value (hoping that the pin level has remained stable)
self->irq_flags = MAP_GPIOPinRead(self->port, self->bit) ? PYB_PIN_RISING_EDGE : PYB_PIN_FALLING_EDGE;
} else {
// same as the triggers
self->irq_flags = self->irq_trigger;
}
mp_irq_handler(mp_irq_find(self));
// always clear the flags after leaving the user handler
self->irq_flags = 0;
}
}
}
void mp_irq_remove (const mp_obj_t parent) {
mp_irq_obj_t *callback_obj;
if ((callback_obj = mp_irq_find(parent))) {
mp_obj_list_remove(&MP_STATE_PORT(mp_irq_obj_list), callback_obj);
}
}
