circuitpython/ports/esp32s2/common-hal/alarm/touch/TouchAlarm.c

182 lines
5.9 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2020 microDev
*
* 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 "shared-bindings/alarm/touch/TouchAlarm.h"
#include "shared-bindings/microcontroller/__init__.h"
#include "esp_sleep.h"
#include "peripherals/touch.h"
#include "supervisor/esp_port.h"
static uint16_t touch_channel_mask;
static volatile bool woke_up = false;
void common_hal_alarm_touch_touchalarm_construct(alarm_touch_touchalarm_obj_t *self, const mcu_pin_obj_t *pin) {
if (pin->touch_channel == TOUCH_PAD_MAX) {
mp_raise_ValueError(translate("Invalid pin"));
}
claim_pin(pin);
self->pin = pin;
}
mp_obj_t alarm_touch_touchalarm_find_triggered_alarm(const 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_touch_touchalarm_type)) {
return alarms[i];
}
}
return mp_const_none;
}
mp_obj_t alarm_touch_touchalarm_create_wakeup_alarm(void) {
// Create TouchAlarm object.
alarm_touch_touchalarm_obj_t *alarm = m_new_obj(alarm_touch_touchalarm_obj_t);
alarm->base.type = &alarm_touch_touchalarm_type;
alarm->pin = NULL;
touch_pad_t wake_channel = touch_pad_get_current_meas_channel();
if (wake_channel == TOUCH_PAD_MAX) {
return alarm;
}
// Map the pin number back to a pin object.
for (size_t i = 0; i < mcu_pin_globals.map.used; i++) {
const mcu_pin_obj_t *pin_obj = MP_OBJ_TO_PTR(mcu_pin_globals.map.table[i].value);
if (pin_obj->touch_channel == wake_channel) {
alarm->pin = mcu_pin_globals.map.table[i].value;
break;
}
}
return alarm;
}
// This is used to wake the main CircuitPython task.
void touch_interrupt(void *arg) {
(void)arg;
woke_up = true;
BaseType_t task_wakeup;
vTaskNotifyGiveFromISR(circuitpython_task, &task_wakeup);
if (task_wakeup) {
portYIELD_FROM_ISR();
}
}
void alarm_touch_touchalarm_set_alarm(const bool deep_sleep, const size_t n_alarms, const mp_obj_t *alarms) {
bool touch_alarm_set = false;
alarm_touch_touchalarm_obj_t *touch_alarm = MP_OBJ_NULL;
for (size_t i = 0; i < n_alarms; i++) {
if (mp_obj_is_type(alarms[i], &alarm_touch_touchalarm_type)) {
if (deep_sleep && touch_alarm_set) {
mp_raise_ValueError(translate("Only one TouchAlarm can be set in deep sleep."));
}
touch_alarm = MP_OBJ_TO_PTR(alarms[i]);
touch_channel_mask |= 1 << touch_alarm->pin->number;
touch_alarm_set = true;
}
}
if (!touch_alarm_set) {
return;
}
// configure interrupt for pretend to deep sleep
// this will be disabled if we actually deep sleep
// reset touch peripheral
peripherals_touch_reset();
peripherals_touch_never_reset(true);
for (uint8_t i = 1; i <= 14; i++) {
if ((touch_channel_mask & 1 << i) != 0) {
touch_pad_t touch_channel = (touch_pad_t)i;
// intialize touchpad
peripherals_touch_init(touch_channel);
// wait for touch data to reset
mp_hal_delay_ms(10);
// configure trigger threshold
uint32_t touch_value;
touch_pad_read_benchmark(touch_channel, &touch_value);
touch_pad_set_thresh(touch_channel, touch_value * 0.1); // 10%
}
}
// configure touch interrupt
touch_pad_timeout_set(true, SOC_TOUCH_PAD_THRESHOLD_MAX);
touch_pad_isr_register(touch_interrupt, NULL, TOUCH_PAD_INTR_MASK_ALL);
touch_pad_intr_enable(TOUCH_PAD_INTR_MASK_ACTIVE | TOUCH_PAD_INTR_MASK_INACTIVE);
}
void alarm_touch_touchalarm_prepare_for_deep_sleep(void) {
if (!touch_channel_mask) {
return;
}
touch_pad_t touch_channel = TOUCH_PAD_MAX;
for (uint8_t i = 1; i <= 14; i++) {
if ((touch_channel_mask & 1 << i) != 0) {
touch_channel = (touch_pad_t)i;
break;
}
}
// reset touch peripheral
peripherals_touch_never_reset(false);
peripherals_touch_reset();
// intialize touchpad
peripherals_touch_init(touch_channel);
// configure touchpad for sleep
touch_pad_sleep_channel_enable(touch_channel, true);
touch_pad_sleep_channel_enable_proximity(touch_channel, false);
// wait for touch data to reset
mp_hal_delay_ms(10);
// configure trigger threshold
uint32_t touch_value;
touch_pad_sleep_channel_read_smooth(touch_channel, &touch_value);
touch_pad_sleep_set_threshold(touch_channel, touch_value * 0.1); // 10%
// enable touchpad wakeup
esp_sleep_enable_touchpad_wakeup();
esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_ON);
}
bool alarm_touch_touchalarm_woke_this_cycle(void) {
return woke_up;
}
void alarm_touch_touchalarm_reset(void) {
woke_up = false;
touch_channel_mask = 0;
peripherals_touch_never_reset(false);
}