Get started example update for addressable LED compatibility.

Added the RMT/addr LED blink to the example and more detailed README.md
 Moved component/led_strip to common_components
 Added missing README file to common_components/led_strip
 README file update
 Makefile and Kconfig fixed for led_strip component
 Fixing end-of-line on main/blink.c
 Component updated to handle multiple instances
 Added note on the RMT channel number (ESP32 and ESP32-S2)
 Removed components folder from rmt/led_strip example and README updated
 Changed the led_strip_denit function and added ESP32-C3 RMT info on channel configuration
 Updates on README, Kconfig default settings and configure_led() function added

examples/get-started/blink/main/Kconfig.projbuild

@@ -1,14 +1,46 @@
 menu "Example Configuration"
 
+    choice BLINK_LED
+        prompt "Blink LED type"
+        default BLINK_LED_RMT if IDF_TARGET_ESP32C3
+        default BLINK_LED_RMT if IDF_TARGET_ESP32S2
+        default BLINK_LED_GPIO
+        help
+            Defines the default peripheral for blink example
+
+        config BLINK_LED_GPIO
+            bool "GPIO"
+        config BLINK_LED_RMT
+            bool "RMT - Addressable LED"
+    endchoice
+
+    config BLINK_LED_RMT_CHANNEL
+        depends on BLINK_LED_RMT
+        int "RMT Channel"
+        range 0 7
+        default 0
+        help
+            Set the RMT peripheral channel.
+            ESP32 RMT channel from 0 to 7
+            ESP32-S2 RMT channel from 0 to 3
+            ESP32-C3 RMT channel from 0 to 1
+
     config BLINK_GPIO
         int "Blink GPIO number"
         range 0 34
+        default 8 if IDF_TARGET_ESP32C3
+        default 18 if IDF_TARGET_ESP32S2
         default 5
         help
-            GPIO number (IOxx) to blink on and off.
-
+            GPIO number (IOxx) to blink on and off or the RMT signal for the addressable LED.
             Some GPIOs are used for other purposes (flash connections, etc.) and cannot be used to blink.
-
             GPIOs 35-39 are input-only so cannot be used as outputs.
 
+    config BLINK_PERIOD
+        int "Blink period in ms"
+        range 10 3600000
+        default 1000
+        help
+            Define the blinking period in milliseconds.
+
 endmenu

examples/get-started/blink/main/blink.c

@@ -10,32 +10,74 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "driver/gpio.h"
+#include "esp_log.h"
+#include "led_strip.h"
 #include "sdkconfig.h"
 
-/* Can use project configuration menu (idf.py menuconfig) to choose the GPIO to blink,
+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
 
-void app_main(void)
+static uint8_t s_led_state = 0;
+
+#ifdef CONFIG_BLINK_LED_RMT
+static led_strip_t *pStrip_a;
+
+static void blink_led(void)
 {
-    /* Configure the IOMUX register for pad BLINK_GPIO (some pads are
-       muxed to GPIO on reset already, but some default to other
-       functions and need to be switched to GPIO. Consult the
-       Technical Reference for a list of pads and their default
-       functions.)
-    */
+    /* 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 */
+        pStrip_a->set_pixel(pStrip_a, 0, 16, 16, 16);
+        /* Refresh the strip to send data */
+        pStrip_a->refresh(pStrip_a, 100);
+    } else {
+        /* Set all LED off to clear all pixels */
+        pStrip_a->clear(pStrip_a, 50);
+    }
+}
+
+static void configure_led(void)
+{
+    ESP_LOGI(TAG, "Example configured to blink addressable LED!");
+    /* LED strip initialization with the GPIO and pixels number*/
+    pStrip_a = led_strip_init(CONFIG_BLINK_LED_RMT_CHANNEL, BLINK_GPIO, 1);
+    /* Set all LED off to clear all pixels */
+    pStrip_a->clear(pStrip_a, 50);
+}
+
+#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);
-    while(1) {
-        /* Blink off (output low) */
-        printf("Turning off the LED\n");
-        gpio_set_level(BLINK_GPIO, 0);
-        vTaskDelay(1000 / portTICK_PERIOD_MS);
-        /* Blink on (output high) */
-        printf("Turning on the LED\n");
-        gpio_set_level(BLINK_GPIO, 1);
-        vTaskDelay(1000 / portTICK_PERIOD_MS);
+}
+
+#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);
     }
 }