308 lines
11 KiB
C
308 lines
11 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2020 Dan Halbert for Adafruit Industries
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* Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/runtime.h"
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#include "shared-bindings/alarm/pin/PinAlarm.h"
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#include "shared-bindings/microcontroller/__init__.h"
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#include "shared-bindings/microcontroller/Pin.h"
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#include "supervisor/esp_port.h"
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#include "components/driver/include/driver/rtc_io.h"
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#include "components/esp32s2/include/esp_sleep.h"
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#include "components/freertos/include/freertos/FreeRTOS.h"
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#include "components/soc/src/esp32s2/include/hal/gpio_ll.h"
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#include "components/xtensa/include/esp_debug_helpers.h"
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void common_hal_alarm_pin_pinalarm_construct(alarm_pin_pinalarm_obj_t *self, mcu_pin_obj_t *pin, bool value, bool edge, bool pull) {
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if (edge) {
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mp_raise_ValueError(translate("Cannot wake on pin edge. Only level."));
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}
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if (pull && !GPIO_IS_VALID_OUTPUT_GPIO(pin->number)) {
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mp_raise_ValueError(translate("Cannot pull on input-only pin."));
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}
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self->pin = pin;
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self->value = value;
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self->pull = pull;
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}
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mcu_pin_obj_t *common_hal_alarm_pin_pinalarm_get_pin(alarm_pin_pinalarm_obj_t *self) {
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return self->pin;
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}
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bool common_hal_alarm_pin_pinalarm_get_value(alarm_pin_pinalarm_obj_t *self) {
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return self->value;
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}
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bool common_hal_alarm_pin_pinalarm_get_edge(alarm_pin_pinalarm_obj_t *self) {
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return false;
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}
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bool common_hal_alarm_pin_pinalarm_get_pull(alarm_pin_pinalarm_obj_t *self) {
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return self->pull;
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}
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gpio_isr_handle_t gpio_interrupt_handle;
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// Low and high are relative to pin number. 32+ is high. <32 is low.
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static volatile uint32_t pin_31_0_status = 0;
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static volatile uint32_t pin_63_32_status = 0;
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void gpio_interrupt(void *arg) {
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(void)arg;
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gpio_ll_get_intr_status(&GPIO, xPortGetCoreID(), (uint32_t *)&pin_31_0_status);
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gpio_ll_clear_intr_status(&GPIO, pin_31_0_status);
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gpio_ll_get_intr_status_high(&GPIO, xPortGetCoreID(), (uint32_t *)&pin_63_32_status);
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gpio_ll_clear_intr_status_high(&GPIO, pin_63_32_status);
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// disable the interrupts that fired, maybe all of them
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for (size_t i = 0; i < 32; i++) {
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uint32_t mask = 1 << i;
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if ((pin_31_0_status & mask) != 0) {
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gpio_ll_intr_disable(&GPIO, i);
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}
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if ((pin_63_32_status & mask) != 0) {
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gpio_ll_intr_disable(&GPIO, 32 + i);
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}
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}
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BaseType_t high_task_wakeup;
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vTaskNotifyGiveFromISR(circuitpython_task, &high_task_wakeup);
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if (high_task_wakeup) {
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portYIELD_FROM_ISR();
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}
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}
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bool alarm_pin_pinalarm_woke_us_up(void) {
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return pin_31_0_status != 0 || pin_63_32_status != 0;
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}
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mp_obj_t alarm_pin_pinalarm_get_wakeup_alarm(size_t n_alarms, const mp_obj_t *alarms) {
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// First, check to see if we match any given alarms.
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uint64_t pin_status = ((uint64_t)pin_63_32_status) << 32 | pin_31_0_status;
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for (size_t i = 0; i < n_alarms; i++) {
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if (!MP_OBJ_IS_TYPE(alarms[i], &alarm_pin_pinalarm_type)) {
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continue;
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}
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alarm_pin_pinalarm_obj_t *alarm = MP_OBJ_TO_PTR(alarms[i]);
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if ((pin_status & (1ull << alarm->pin->number)) != 0) {
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return alarms[i];
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}
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}
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esp_sleep_wakeup_cause_t cause = esp_sleep_get_wakeup_cause();
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size_t pin_number = 64;
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if (cause == ESP_SLEEP_WAKEUP_EXT0) {
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pin_number = REG_GET_FIELD(RTC_IO_EXT_WAKEUP0_REG, RTC_IO_EXT_WAKEUP0_SEL);
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} else {
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if (cause == ESP_SLEEP_WAKEUP_EXT1) {
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pin_status = esp_sleep_get_ext1_wakeup_status();
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}
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// If the cause is GPIO, we've already snagged pin_status in the interrupt.
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// We'll only get here if we pretended to deep sleep. Light sleep will
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// pass in existing objects.
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for (size_t i = 0; i < 64; i++) {
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if ((pin_status & (1ull << i)) != 0) {
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pin_number = i;
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break;
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}
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}
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}
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alarm_pin_pinalarm_obj_t *alarm = m_new_obj(alarm_pin_pinalarm_obj_t);
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alarm->base.type = &alarm_pin_pinalarm_type;
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alarm->pin = NULL;
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// Map the pin number back to a pin object.
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for (size_t i = 0; i < mcu_pin_globals.map.used; i++) {
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const mcu_pin_obj_t *pin_obj = MP_OBJ_TO_PTR(mcu_pin_globals.map.table[i].value);
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if ((size_t)pin_obj->number == pin_number) {
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alarm->pin = mcu_pin_globals.map.table[i].value;
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break;
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}
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}
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return alarm;
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}
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// These must be static because we need to configure pulls later, right before
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// deep sleep.
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static uint64_t high_alarms = 0;
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static uint64_t low_alarms = 0;
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static uint64_t pull_pins = 0;
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void alarm_pin_pinalarm_reset(void) {
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if (gpio_interrupt_handle != NULL) {
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esp_intr_free(gpio_interrupt_handle);
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gpio_interrupt_handle = NULL;
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}
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for (size_t i = 0; i < 64; i++) {
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uint64_t mask = 1ull << i;
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bool high = (high_alarms & mask) != 0;
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bool low = (low_alarms & mask) != 0;
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if (!(high || low)) {
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continue;
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}
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reset_pin_number(i);
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}
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high_alarms = 0;
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low_alarms = 0;
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pull_pins = 0;
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pin_63_32_status = 0;
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pin_31_0_status = 0;
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}
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void alarm_pin_pinalarm_set_alarms(bool deep_sleep, size_t n_alarms, const mp_obj_t *alarms) {
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// Bitmask of wake up settings.
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size_t high_count = 0;
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size_t low_count = 0;
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for (size_t i = 0; i < n_alarms; i++) {
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// TODO: Check for ULP or touch alarms because they can't coexist with GPIO alarms.
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if (!MP_OBJ_IS_TYPE(alarms[i], &alarm_pin_pinalarm_type)) {
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continue;
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}
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alarm_pin_pinalarm_obj_t *alarm = MP_OBJ_TO_PTR(alarms[i]);
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gpio_num_t pin_number = alarm->pin->number;
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if (alarm->value) {
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high_alarms |= 1ull << pin_number;
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high_count++;
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} else {
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low_alarms |= 1ull << pin_number;
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low_count++;
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}
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if (alarm->pull) {
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pull_pins |= 1ull << pin_number;
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}
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}
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if (high_count == 0 && low_count == 0) {
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return;
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}
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if (deep_sleep && low_count > 2 && high_count == 0) {
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mp_raise_ValueError(translate("Can only alarm on two low pins from deep sleep."));
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}
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if (deep_sleep && low_count > 1 && high_count > 0) {
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mp_raise_ValueError(translate("Can only alarm on one low pin while others alarm high from deep sleep."));
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}
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// Only use ext0 and ext1 during deep sleep.
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if (deep_sleep) {
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if (high_count > 0) {
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if (esp_sleep_enable_ext1_wakeup(high_alarms, ESP_EXT1_WAKEUP_ANY_HIGH) != ESP_OK) {
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mp_raise_ValueError(translate("Can only alarm on RTC IO from deep sleep."));
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}
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}
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size_t low_pins[2];
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size_t j = 0;
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for (size_t i = 0; i < 64; i++) {
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uint64_t mask = 1ull << i;
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if ((low_alarms & mask) != 0) {
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low_pins[j++] = i;
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}
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if (j == 2) {
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break;
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}
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}
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if (low_count > 1) {
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if (esp_sleep_enable_ext1_wakeup(1ull << low_pins[1], ESP_EXT1_WAKEUP_ALL_LOW) != ESP_OK) {
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mp_raise_ValueError(translate("Can only alarm on RTC IO from deep sleep."));
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}
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}
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if (low_count > 0) {
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if (esp_sleep_enable_ext0_wakeup(low_pins[0], 0) != ESP_OK) {
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mp_raise_ValueError(translate("Can only alarm on RTC IO from deep sleep."));
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}
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}
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} else {
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// Enable GPIO wake up if we're sleeping.
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esp_sleep_enable_gpio_wakeup();
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}
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// Set GPIO interrupts so they wake us from light sleep or from idle via the
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// interrupt handler above.
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pin_31_0_status = 0;
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pin_63_32_status = 0;
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if (gpio_isr_register(gpio_interrupt, NULL, 0, &gpio_interrupt_handle) != ESP_OK) {
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mp_raise_ValueError(translate("Can only alarm on RTC IO from deep sleep."));
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}
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for (size_t i = 0; i < 64; i++) {
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uint64_t mask = 1ull << i;
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bool high = (high_alarms & mask) != 0;
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bool low = (low_alarms & mask) != 0;
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bool pull = (pull_pins & mask) != 0;
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if (!(high || low)) {
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continue;
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}
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if (rtc_gpio_is_valid_gpio(i)) {
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rtc_gpio_deinit(i);
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}
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gpio_int_type_t interrupt_mode = GPIO_INTR_DISABLE;
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gpio_pull_mode_t pull_mode = GPIO_FLOATING;
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if (high) {
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interrupt_mode = GPIO_INTR_HIGH_LEVEL;
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pull_mode = GPIO_PULLDOWN_ONLY;
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}
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if (low) {
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interrupt_mode = GPIO_INTR_LOW_LEVEL;
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pull_mode = GPIO_PULLUP_ONLY;
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}
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gpio_set_direction(i, GPIO_MODE_DEF_INPUT);
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PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[i], PIN_FUNC_GPIO);
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if (pull) {
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gpio_set_pull_mode(i, pull_mode);
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size_t j = 0;
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while (gpio_get_level(i) == false) {
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j++;
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}
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}
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never_reset_pin_number(i);
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// Sets interrupt type and wakeup bits.
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gpio_wakeup_enable(i, interrupt_mode);
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gpio_intr_enable(i);
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}
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}
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void alarm_pin_pinalarm_prepare_for_deep_sleep(void) {
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if (pull_pins == 0) {
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return;
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}
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for (size_t i = 0; i < 64; i++) {
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uint64_t mask = 1ull << i;
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bool pull = (pull_pins & mask) != 0;
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if (!pull) {
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continue;
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}
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bool high = (high_alarms & mask) != 0;
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bool low = (low_alarms & mask) != 0;
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// The pull direction is opposite from alarm value.
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if (high) {
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rtc_gpio_pullup_dis(i);
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rtc_gpio_pulldown_en(i);
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}
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if (low) {
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rtc_gpio_pullup_en(i);
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rtc_gpio_pulldown_dis(i);
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}
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}
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}
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