kopia lustrzana https://github.com/espressif/esp-idf
84 wiersze
2.3 KiB
C
84 wiersze
2.3 KiB
C
/*
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* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Unlicense OR CC0-1.0
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*/
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/* ULP riscv DS18B20 1wire temperature sensor example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include <stdio.h>
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#include "esp_sleep.h"
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#include "soc/sens_reg.h"
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#include "driver/gpio.h"
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#include "ulp_riscv.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#define WAKEUP_PIN 0
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extern const uint8_t ulp_main_bin_start[] asm("_binary_ulp_main_bin_start");
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extern const uint8_t ulp_main_bin_end[] asm("_binary_ulp_main_bin_end");
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static void init_ulp_program(void);
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static void wakeup_gpio_init(void)
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{
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/* Configure the button GPIO as input, enable wakeup */
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gpio_config_t config = {
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.pin_bit_mask = BIT64(WAKEUP_PIN),
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.mode = GPIO_MODE_INPUT
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};
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ESP_ERROR_CHECK(gpio_config(&config));
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gpio_wakeup_enable(WAKEUP_PIN, GPIO_INTR_LOW_LEVEL);
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gpio_hold_en(WAKEUP_PIN);
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}
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void app_main(void)
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{
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esp_sleep_wakeup_cause_t cause = esp_sleep_get_wakeup_cause();
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/* not a wakeup from ULP, load the firmware */
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if (cause != ESP_SLEEP_WAKEUP_ULP) {
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printf("Not a ULP-RISC-V wakeup, initializing it! \n");
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wakeup_gpio_init();
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init_ulp_program();
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}
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if (cause == ESP_SLEEP_WAKEUP_ULP) {
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printf("ULP-RISC-V woke up the main CPU! \n");
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}
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/* Go back to sleep, only the ULP Risc-V will run */
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printf("Entering in deep sleep\n\n");
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/* Small delay to ensure the messages are printed */
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vTaskDelay(100);
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/* RTC peripheral power domain needs to be kept on to detect
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the GPIO state change */
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esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_ON);
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ESP_ERROR_CHECK( esp_sleep_enable_ulp_wakeup());
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esp_deep_sleep_start();
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}
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static void init_ulp_program(void)
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{
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esp_err_t err = ulp_riscv_load_binary(ulp_main_bin_start, (ulp_main_bin_end - ulp_main_bin_start));
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ESP_ERROR_CHECK(err);
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/* Start the program */
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ulp_riscv_cfg_t cfg = {
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.wakeup_source = ULP_RISCV_WAKEUP_SOURCE_GPIO,
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};
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err = ulp_riscv_config_and_run(&cfg);
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ESP_ERROR_CHECK(err);
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}
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