feat(blink): Support different led_strip backend peripheral

examples/get-started/blink/README.md

@@ -5,9 +5,7 @@
 
 (See the README.md file in the upper level 'examples' directory for more information about examples.)
 
-This example demonstrates how to blink a LED using GPIO or using the [led_strip](https://components.espressif.com/component/espressif/led_strip) component for the addressable LED, i.e. [WS2812](https://cdn-shop.adafruit.com/datasheets/WS2812B.pdf).
-
-The `led_strip` is installed via [component manager](main/idf_component.yml).
+This example demonstrates how to blink a LED by using the GPIO driver or using the [led_strip](https://components.espressif.com/component/espressif/led_strip) library if the LED is addressable e.g. [WS2812](https://cdn-shop.adafruit.com/datasheets/WS2812B.pdf). The `led_strip` library is installed via [component manager](main/idf_component.yml).
 
 ## How to Use Example
 
@@ -15,19 +13,9 @@ Before project configuration and build, be sure to set the correct chip target u
 
 ### Hardware Required
 
-* A development board with Espressif SoC (e.g., ESP32-DevKitC, ESP-WROVER-KIT, etc.)
+* A development board with normal LED or addressable LED on-board (e.g., ESP32-S3-DevKitC, ESP32-C6-DevKitC etc.)
 * A USB cable for Power supply and programming
 
-Some development boards use an addressable LED instead of a regular one. These development boards include:
-
-| Board                | LED type             | Pin                  |
-| -------------------- | -------------------- | -------------------- |
-| ESP32-C3-DevKitC-1   | Addressable          | GPIO8                |
-| ESP32-C3-DevKitM-1   | Addressable          | GPIO8                |
-| ESP32-S2-DevKitM-1   | Addressable          | GPIO18               |
-| ESP32-S2-Saola-1     | Addressable          | GPIO18               |
-| ESP32-S3-DevKitC-1   | Addressable          | GPIO48               |
-
 See [Development Boards](https://www.espressif.com/en/products/devkits) for more information about it.
 
 ### Configure the Project
@@ -37,7 +25,11 @@ Open the project configuration menu (`idf.py menuconfig`).
 In the `Example Configuration` menu:
 
 * Select the LED type in the `Blink LED type` option.
-  * Use `GPIO` for regular LED blink.
+  * Use `GPIO` for regular LED
+  * Use `LED strip` for addressable LED
+* If the LED type is `LED strip`, select the backend peripheral
+  * `RMT` is only available for ESP targets with RMT peripheral supported
+  * `SPI` is available for all ESP targets
 * Set the GPIO number used for the signal in the `Blink GPIO number` option.
 * Set the blinking period in the `Blink period in ms` option.
 

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

@@ -4,15 +4,32 @@ menu "Example Configuration"
 
     choice BLINK_LED
         prompt "Blink LED type"
-        default BLINK_LED_GPIO if IDF_TARGET_ESP32 || !SOC_RMT_SUPPORTED
-        default BLINK_LED_RMT
+        default BLINK_LED_GPIO if IDF_TARGET_ESP32 || IDF_TARGET_ESP32C2
+        default BLINK_LED_STRIP
         help
-            Defines the default peripheral for blink example
+            Select the LED type. A normal level controlled LED or an addressable LED strip.
+            The default selection is based on the Espressif DevKit boards.
+            You can change the default selection according to your board.
 
         config BLINK_LED_GPIO
             bool "GPIO"
-        config BLINK_LED_RMT
-            bool "RMT - Addressable LED"
+        config BLINK_LED_STRIP
+            bool "LED strip"
+    endchoice
+
+    choice BLINK_LED_STRIP_BACKEND
+        depends on BLINK_LED_STRIP
+        prompt "LED strip backend peripheral"
+        default BLINK_LED_STRIP_BACKEND_RMT if SOC_RMT_SUPPORTED
+        default BLINK_LED_STRIP_BACKEND_SPI
+        help
+            Select the backend peripheral to drive the LED strip.
+
+        config BLINK_LED_STRIP_BACKEND_RMT
+            depends on SOC_RMT_SUPPORTED
+            bool "RMT"
+        config BLINK_LED_STRIP_BACKEND_SPI
+            bool "SPI"
     endchoice
 
     config BLINK_GPIO
@@ -23,7 +40,7 @@ menu "Example Configuration"
         default 48 if IDF_TARGET_ESP32S3
         default 8
         help
-            GPIO number (IOxx) to blink on and off or the RMT signal for the addressable LED.
+            GPIO number (IOxx) to blink on and off the LED.
             Some GPIOs are used for other purposes (flash connections, etc.) and cannot be used to blink.
 
     config BLINK_PERIOD

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

@@ -23,7 +23,7 @@ static const char *TAG = "example";
 
 static uint8_t s_led_state = 0;
 
-#ifdef CONFIG_BLINK_LED_RMT
+#ifdef CONFIG_BLINK_LED_STRIP
 
 static led_strip_handle_t led_strip;
 
@@ -49,10 +49,21 @@ static void configure_led(void)
         .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);
 }
@@ -73,6 +84,8 @@ static void configure_led(void)
     gpio_set_direction(BLINK_GPIO, GPIO_MODE_OUTPUT);
 }
 
+#else
+#error "unsupported LED type"
 #endif
 
 void app_main(void)

examples/get-started/blink/main/idf_component.yml

@@ -1,2 +1,2 @@
 dependencies:
-  espressif/led_strip: "^2.0.0"
+  espressif/led_strip: "^2.4.1"

examples/get-started/blink/sdkconfig.ci.led_strip_spi

@@ -0,0 +1,2 @@
+CONFIG_BLINK_LED_STRIP=y
+CONFIG_BLINK_LED_STRIP_BACKEND_SPI=y