Blink

main/CMakeLists.txt

@@ -1,2 +1,2 @@
-idf_component_register(SRCS "main.c"
+idf_component_register(SRCS "main.c" "task_blink.c"
                     INCLUDE_DIRS ".")

main/main.c

@@ -1,6 +1,8 @@
+#include "freertos/idf_additions.h"
+#include "tasks.h"
 #include <stdio.h>
 
-void app_main(void)
-{
-
+void app_main(void) {
+    TaskHandle_t task_handle_blink;
+    xTaskCreate(task_blink, "task_blink", 1024, NULL, 0, &task_handle_blink);
 }

main/task_blink.c

@@ -0,0 +1,20 @@
+#include "freertos/idf_additions.h"
+#include "portmacro.h"
+#include <driver/gpio.h>
+#include <esp_rom_gpio.h>
+#include <freertos/FreeRTOS.h>
+#include <freertos/task.h>
+
+#include "tasks.h"
+
+void task_blink(void *pvParams) {
+    esp_rom_gpio_pad_select_gpio(LED_PIN);
+    gpio_set_direction(LED_PIN, GPIO_MODE_OUTPUT);
+
+    while (1) {
+        gpio_set_level(LED_PIN, 0);
+        vTaskDelay(BLINK_DELAY / portTICK_PERIOD_MS);
+        gpio_set_level(LED_PIN, 1);
+        vTaskDelay(BLINK_DELAY / portTICK_PERIOD_MS);
+    }
+}

main/tasks.h

@@ -0,0 +1,14 @@
+#ifndef TASKS_H
+#define TASKS_H
+
+/*
+ * This file exports all the individual tasks, avoiding tons of semi-empty headers.
+ */
+
+#define LED_PIN     2
+#define RATE_PER_S  10
+#define BLINK_DELAY (1000 / 2 / RATE_PER_S)
+
+void task_blink(void *pvParams);
+
+#endif