mirror of
https://github.com/espressif/esp-idf.git
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86 lines
3.3 KiB
C
86 lines
3.3 KiB
C
/* Task_Watchdog 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 <stdlib.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_task_wdt.h"
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#define TWDT_TIMEOUT_S 3
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#define TASK_RESET_PERIOD_S 2
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/*
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* Macro to check the outputs of TWDT functions and trigger an abort if an
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* incorrect code is returned.
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*/
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#define CHECK_ERROR_CODE(returned, expected) ({ \
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if(returned != expected){ \
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printf("TWDT ERROR\n"); \
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abort(); \
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} \
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})
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static TaskHandle_t task_handles[portNUM_PROCESSORS];
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//Callback for user tasks created in app_main()
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void reset_task(void *arg)
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{
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//Subscribe this task to TWDT, then check if it is subscribed
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CHECK_ERROR_CODE(esp_task_wdt_add(NULL), ESP_OK);
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CHECK_ERROR_CODE(esp_task_wdt_status(NULL), ESP_OK);
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while(1){
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//reset the watchdog every 2 seconds
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CHECK_ERROR_CODE(esp_task_wdt_reset(), ESP_OK); //Comment this line to trigger a TWDT timeout
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vTaskDelay(pdMS_TO_TICKS(TASK_RESET_PERIOD_S * 1000));
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}
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}
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void app_main(void)
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{
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printf("Initialize TWDT\n");
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//Initialize or reinitialize TWDT
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CHECK_ERROR_CODE(esp_task_wdt_init(TWDT_TIMEOUT_S, false), ESP_OK);
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//Subscribe Idle Tasks to TWDT if they were not subscribed at startup
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#ifndef CONFIG_ESP_TASK_WDT_CHECK_IDLE_TASK_CPU0
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esp_task_wdt_add(xTaskGetIdleTaskHandleForCPU(0));
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#endif
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#if CONFIG_ESP_TASK_WDT_CHECK_IDLE_TASK_CPU1 && !CONFIG_FREERTOS_UNICORE
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esp_task_wdt_add(xTaskGetIdleTaskHandleForCPU(1));
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#endif
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//Create user tasks and add them to watchdog
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for(int i = 0; i < portNUM_PROCESSORS; i++){
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xTaskCreatePinnedToCore(reset_task, "reset task", 1024, NULL, 10, &task_handles[i], i);
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}
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printf("Delay for 10 seconds\n");
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vTaskDelay(pdMS_TO_TICKS(10000)); //Delay for 10 seconds
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printf("Unsubscribing and deleting tasks\n");
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//Delete and unsubscribe Users Tasks from Task Watchdog, then unsubscribe idle task
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for(int i = 0; i < portNUM_PROCESSORS; i++){
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vTaskDelete(task_handles[i]); //Delete user task first (prevents the resetting of an unsubscribed task)
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CHECK_ERROR_CODE(esp_task_wdt_delete(task_handles[i]), ESP_OK); //Unsubscribe task from TWDT
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CHECK_ERROR_CODE(esp_task_wdt_status(task_handles[i]), ESP_ERR_NOT_FOUND); //Confirm task is unsubscribed
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//unsubscribe idle task
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CHECK_ERROR_CODE(esp_task_wdt_delete(xTaskGetIdleTaskHandleForCPU(i)), ESP_OK); //Unsubscribe Idle Task from TWDT
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CHECK_ERROR_CODE(esp_task_wdt_status(xTaskGetIdleTaskHandleForCPU(i)), ESP_ERR_NOT_FOUND); //Confirm Idle task has unsubscribed
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}
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//Deinit TWDT after all tasks have unsubscribed
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CHECK_ERROR_CODE(esp_task_wdt_deinit(), ESP_OK);
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CHECK_ERROR_CODE(esp_task_wdt_status(NULL), ESP_ERR_INVALID_STATE); //Confirm TWDT has been deinitialized
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printf("Complete\n");
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}
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