STATIC void PRCMInterruptHandler (void) {
// reading the interrupt status automatically clears the interrupt
if (PRCM_INT_SLOW_CLK_CTR == MAP_PRCMIntStatus()) {
// reconfigure it again (if repeat is true)
pyb_rtc_repeat_alarm (pybsleep_data.rtc_obj);
pybsleep_data.rtc_obj->irq_flags = PYB_RTC_ALARM0;
// need to check if irq's are enabled from the user point of view
if (pybsleep_data.rtc_obj->irq_enabled && (pybsleep_data.rtc_obj->pwrmode & PYB_PWR_MODE_ACTIVE)) {
mp_irq_handler(pybsleep_data.rtc_obj->irq_obj);
}
pybsleep_data.rtc_obj->irq_flags = 0;
} else {
// interrupt has been triggered while waking up from LPDS
switch (MAP_PRCMLPDSWakeupCauseGet()) {
case PRCM_LPDS_HOST_IRQ:
pybsleep_data.wlan_obj->irq_flags = MODWLAN_WIFI_EVENT_ANY;
mp_irq_handler(pybsleep_data.wlan_obj->irq_obj);
pybsleep_wake_reason = PYB_SLP_WAKED_BY_WLAN;
pybsleep_data.wlan_obj->irq_flags = 0;
break;
case PRCM_LPDS_GPIO:
mp_irq_handler(pybsleep_data.gpio_lpds_wake_cb);
pybsleep_wake_reason = PYB_SLP_WAKED_BY_GPIO;
break;
case PRCM_LPDS_TIMER:
// reconfigure it again if repeat is true
pyb_rtc_repeat_alarm (pybsleep_data.rtc_obj);
pybsleep_data.rtc_obj->irq_flags = PYB_RTC_ALARM0;
// next one clears the wake cause flag
MAP_PRCMLPDSWakeupSourceDisable(PRCM_LPDS_TIMER);
mp_irq_handler(pybsleep_data.rtc_obj->irq_obj);
pybsleep_data.rtc_obj->irq_flags = 0;
pybsleep_wake_reason = PYB_SLP_WAKED_BY_RTC;
break;
default:
break;
}
}
}
// 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;
}
}
}
STATIC mp_obj_t mp_irq_call (mp_obj_t self_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 0, 0, false);
mp_irq_handler (self_in);
return mp_const_none;
}
