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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2021 Lucian Copeland for Adafruit Industries
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/runtime.h"
#include "shared-bindings/alarm/pin/PinAlarm.h"
#include "shared-bindings/microcontroller/__init__.h"
#include "common-hal/microcontroller/__init__.h"
#include "shared-bindings/microcontroller/Pin.h"
#include "pico/stdlib.h"
#include "hardware/gpio.h"
#include "hardware/structs/iobank0.h"
STATIC bool woke_up;
STATIC uint64_t alarm_triggered_pins; // 36 actual pins
STATIC uint64_t alarm_reserved_pins; // 36 actual pins
STATIC bool _pinalarm_set = false;
#define GPIO_IRQ_ALL_EVENTS 0x15u
STATIC void gpio_callback(uint gpio, uint32_t events) {
alarm_triggered_pins |= (1 << gpio);
woke_up = true;
// does this need to be called, to prevent IRQ from constantly going off?
gpio_acknowledge_irq(gpio, events);
// Disable IRQ automatically
gpio_set_irq_enabled(gpio, events, false);
gpio_set_dormant_irq_enabled(gpio, events, false);
}
void common_hal_alarm_pin_pinalarm_construct(alarm_pin_pinalarm_obj_t *self, const mcu_pin_obj_t *pin, bool value, bool edge, bool pull) {
self->pin = pin;
self->value = value;
self->edge = edge;
self->pull = pull;
}
const mcu_pin_obj_t *common_hal_alarm_pin_pinalarm_get_pin(alarm_pin_pinalarm_obj_t *self) {
return self->pin;
}
bool common_hal_alarm_pin_pinalarm_get_value(alarm_pin_pinalarm_obj_t *self) {
return self->value;
}
bool common_hal_alarm_pin_pinalarm_get_edge(alarm_pin_pinalarm_obj_t *self) {
return self->edge;
}
bool common_hal_alarm_pin_pinalarm_get_pull(alarm_pin_pinalarm_obj_t *self) {
return self->pull;
}
bool alarm_pin_pinalarm_woke_this_cycle(void) {
return woke_up;
}
mp_obj_t alarm_pin_pinalarm_find_triggered_alarm(size_t n_alarms, const mp_obj_t *alarms) {
for (size_t i = 0; i < n_alarms; i++) {
if (!mp_obj_is_type(alarms[i], &alarm_pin_pinalarm_type)) {
continue;
}
alarm_pin_pinalarm_obj_t *alarm = MP_OBJ_TO_PTR(alarms[i]);
if (alarm_triggered_pins & (1 << alarm->pin->number)) {
return alarms[i];
}
}
return mp_const_none;
}
mp_obj_t alarm_pin_pinalarm_create_wakeup_alarm(void) {
alarm_pin_pinalarm_obj_t *alarm = m_new_obj(alarm_pin_pinalarm_obj_t);
alarm->base.type = &alarm_pin_pinalarm_type;
// TODO: how to obtain the correct pin from memory?
return alarm;
}
void alarm_pin_pinalarm_reset(void) {
alarm_triggered_pins = 0;
woke_up = false;
// Clear all GPIO interrupts
for (uint8_t i = 0; i < 4; i++) {
iobank0_hw->intr[i] = 0;
}
// Reset pins and pin IRQs
for (size_t i = 0; i < TOTAL_GPIO_COUNT; i++) {
if (alarm_reserved_pins & (1 << i)) {
gpio_set_irq_enabled(i, GPIO_IRQ_ALL_EVENTS, false);
reset_pin_number(i);
}
}
alarm_reserved_pins = 0;
}
void alarm_pin_pinalarm_set_alarms(bool deep_sleep, size_t n_alarms, const mp_obj_t *alarms) {
for (size_t i = 0; i < n_alarms; i++) {
if (mp_obj_is_type(alarms[i], &alarm_pin_pinalarm_type)) {
alarm_pin_pinalarm_obj_t *alarm = MP_OBJ_TO_PTR(alarms[i]);
gpio_init(alarm->pin->number);
if (alarm->pull) {
// If value is high, the pullup should be off, and vice versa
gpio_set_pulls(alarm->pin->number, !alarm->value, alarm->value);
} else {
// Clear in case the pulls are already on
gpio_set_pulls(alarm->pin->number, false, false);
}
gpio_set_dir(alarm->pin->number, GPIO_IN);
// Don't reset at end of VM (instead, pinalarm_reset will reset before next VM)
common_hal_never_reset_pin(alarm->pin);
alarm_reserved_pins |= (1 << alarm->pin->number);
uint32_t event;
if (alarm->value == true && alarm->edge == true) {
event = GPIO_IRQ_EDGE_RISE;
} else if (alarm->value == false && alarm->edge == true) {
event = GPIO_IRQ_EDGE_FALL;
} else if (alarm->value == true && alarm->edge == false) {
event = GPIO_IRQ_LEVEL_HIGH;
} else { // both false
event = GPIO_IRQ_LEVEL_LOW;
}
gpio_set_irq_enabled_with_callback((uint)alarm->pin->number, event, true, &gpio_callback);
if (deep_sleep) {
gpio_set_dormant_irq_enabled((uint)alarm->pin->number, event, true);
}
_pinalarm_set = true;
}
}
}
bool alarm_pin_pinalarm_is_set(void) {
return _pinalarm_set;
}
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