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ESP32-IDF_Blink/main/blink_example_main.c

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+/* Blink Example
+
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+*/
+#include <stdio.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "driver/gpio.h"
+#include "esp_log.h"
+#include "led_strip.h"
+#include "sdkconfig.h"
+
+static const char *TAG = "example";
+
+/* Use project configuration menu (idf.py menuconfig) to choose the GPIO to blink,
+   or you can edit the following line and set a number here.
+*/
+#define BLINK_GPIO CONFIG_BLINK_GPIO
+
+static uint8_t s_led_state = 0;
+
+#ifdef CONFIG_BLINK_LED_STRIP
+
+static led_strip_handle_t led_strip;
+
+static void blink_led(void)
+{
+    /* If the addressable LED is enabled */
+    if (s_led_state) {
+        /* Set the LED pixel using RGB from 0 (0%) to 255 (100%) for each color */
+        led_strip_set_pixel(led_strip, 0, 16, 16, 16);
+        /* Refresh the strip to send data */
+        led_strip_refresh(led_strip);
+    } else {
+        /* Set all LED off to clear all pixels */
+        led_strip_clear(led_strip);
+    }
+}
+
+static void configure_led(void)
+{
+    ESP_LOGI(TAG, "Example configured to blink addressable LED!");
+    /* LED strip initialization with the GPIO and pixels number*/
+    led_strip_config_t strip_config = {
+        .strip_gpio_num = BLINK_GPIO,
+        .max_leds = 1, // at least one LED on board
+    };
+#if CONFIG_BLINK_LED_STRIP_BACKEND_RMT
+    led_strip_rmt_config_t rmt_config = {
+        .resolution_hz = 10 * 1000 * 1000, // 10MHz
+        .flags.with_dma = false,
+    };
+    ESP_ERROR_CHECK(led_strip_new_rmt_device(&strip_config, &rmt_config, &led_strip));
+#elif CONFIG_BLINK_LED_STRIP_BACKEND_SPI
+    led_strip_spi_config_t spi_config = {
+        .spi_bus = SPI2_HOST,
+        .flags.with_dma = true,
+    };
+    ESP_ERROR_CHECK(led_strip_new_spi_device(&strip_config, &spi_config, &led_strip));
+#else
+#error "unsupported LED strip backend"
+#endif
+    /* Set all LED off to clear all pixels */
+    led_strip_clear(led_strip);
+}
+
+#elif CONFIG_BLINK_LED_GPIO
+
+static void blink_led(void)
+{
+    /* Set the GPIO level according to the state (LOW or HIGH)*/
+    gpio_set_level(BLINK_GPIO, s_led_state);
+}
+
+static void configure_led(void)
+{
+    ESP_LOGI(TAG, "Example configured to blink GPIO LED!");
+    gpio_reset_pin(BLINK_GPIO);
+    /* Set the GPIO as a push/pull output */
+    gpio_set_direction(BLINK_GPIO, GPIO_MODE_OUTPUT);
+}
+
+#else
+#error "unsupported LED type"
+#endif
+
+void app_main(void)
+{
+
+    /* Configure the peripheral according to the LED type */
+    configure_led();
+
+    while (1) {
+        ESP_LOGI(TAG, "Turning the LED %s!", s_led_state == true ? "ON" : "OFF");
+        blink_led();
+        /* Toggle the LED state */
+        s_led_state = !s_led_state;
+        vTaskDelay(CONFIG_BLINK_PERIOD / portTICK_PERIOD_MS);
+    }
+}