2020-06-14 Add ws2812 driver for esp32s2

19_s2_ws2812/CMakeLists.txt

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+# The following lines of boilerplate have to be in your project's CMakeLists
+# in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.5)
+
+set(EXTRA_COMPONENTS_DIRS "./components")
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(esp32s2-ws2812)

19_s2_ws2812/Makefile

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+#
+# This is a project Makefile. It is assumed the directory this Makefile resides in is a
+# project subdirectory.
+#
+
+PROJECT_NAME := esp32-ws2812
+
+include $(IDF_PATH)/make/project.mk
+

19_s2_ws2812/README.md

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+WS2812 驱动和示范！

19_s2_ws2812/components/led_strip/CMakeLists.txt

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+set(component_srcs "src/led_strip_rmt_ws2812.c")
+
+idf_component_register(SRCS "${component_srcs}"
+                       INCLUDE_DIRS "include"
+                       PRIV_INCLUDE_DIRS ""
+                       PRIV_REQUIRES "driver"
+                       REQUIRES "")
+

19_s2_ws2812/components/led_strip/component.mk

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+COMPONENT_ADD_INCLUDEDIRS := include
+
+COMPONENT_SRCDIRS := src

19_s2_ws2812/components/led_strip/include/led_strip.h

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+// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include "esp_err.h"
+
+#define WS2812B_RMT_LED_NUMBER 24
+#define WS2812B_RMT_LED_GPIO 45
+    /**
+* @brief LED Strip Type
+*
+*/
+    typedef struct led_strip_s led_strip_t;
+
+    /**
+* @brief LED Strip Device Type
+*
+*/
+    typedef void *led_strip_dev_t;
+
+    /**
+* @brief Declare of LED Strip Type
+*
+*/
+    struct led_strip_s
+    {
+        /**
+    * @brief Set RGB for a specific pixel
+    *
+    * @param strip: LED strip
+    * @param index: index of pixel to set
+    * @param red: red part of color
+    * @param green: green part of color
+    * @param blue: blue part of color
+    *
+    * @return
+    *      - ESP_OK: Set RGB for a specific pixel successfully
+    *      - ESP_ERR_INVALID_ARG: Set RGB for a specific pixel failed because of invalid parameters
+    *      - ESP_FAIL: Set RGB for a specific pixel failed because other error occurred
+    */
+        esp_err_t (*set_pixel)(led_strip_t *strip, uint32_t index, uint32_t red, uint32_t green, uint32_t blue);
+
+        /**
+    * @brief Refresh memory colors to LEDs
+    *
+    * @param strip: LED strip
+    * @param timeout_ms: timeout value for refreshing task
+    *
+    * @return
+    *      - ESP_OK: Refresh successfully
+    *      - ESP_ERR_TIMEOUT: Refresh failed because of timeout
+    *      - ESP_FAIL: Refresh failed because some other error occurred
+    *
+    * @note:
+    *      After updating the LED colors in the memory, a following invocation of this API is needed to flush colors to strip.
+    */
+        esp_err_t (*refresh)(led_strip_t *strip, uint32_t timeout_ms);
+
+        /**
+    * @brief Clear LED strip (turn off all LEDs)
+    *
+    * @param strip: LED strip
+    * @param timeout_ms: timeout value for clearing task
+    *
+    * @return
+    *      - ESP_OK: Clear LEDs successfully
+    *      - ESP_ERR_TIMEOUT: Clear LEDs failed because of timeout
+    *      - ESP_FAIL: Clear LEDs failed because some other error occurred
+    */
+        esp_err_t (*clear)(led_strip_t *strip, uint32_t timeout_ms);
+
+        /**
+    * @brief set LED strip all
+    *
+    * @param strip: LED strip
+    * @param timeout_ms: timeout value for clearing task
+    *
+    * @return
+    *      - ESP_OK: Clear LEDs successfully
+    *      - ESP_ERR_TIMEOUT: Clear LEDs failed because of timeout
+    *      - ESP_FAIL: Clear LEDs failed because some other error occurred
+    */
+        esp_err_t (*set_rgb)(led_strip_t *strip, uint32_t timeout_ms, uint32_t red, uint32_t green, uint32_t blue);
+
+        /**
+    * @brief Free LED strip resources
+    *
+    * @param strip: LED strip
+    *
+    * @return
+    *      - ESP_OK: Free resources successfully
+    *      - ESP_FAIL: Free resources failed because error occurred
+    */
+        esp_err_t (*del)(led_strip_t *strip);
+    };
+
+    /**
+* @brief LED Strip Configuration Type
+*
+*/
+    typedef struct
+    {
+        uint32_t max_leds;   /*!< Maximum LEDs in a single strip */
+        led_strip_dev_t dev; /*!< LED strip device (e.g. RMT channel, PWM channel, etc) */
+    } led_strip_config_t;
+
+/**
+ * @brief Default configuration for LED strip
+ *
+ */
+#define LED_STRIP_DEFAULT_CONFIG(number, dev_hdl) \
+    {                                             \
+        .max_leds = number,                       \
+        .dev = dev_hdl,                           \
+    }
+
+    /**
+* @brief Install a new ws2812 driver (based on RMT peripheral)
+*
+* @param config: LED strip configuration
+* @return
+*      LED strip instance or NULL
+*/
+    led_strip_t *led_strip_new_rmt_ws2812(const led_strip_config_t *config);
+
+    /**
+ * @description: hsv模型转rgb
+ * @param {type} 
+ * @return: 
+ */
+    void led_strip_hsv2rgb(uint32_t h, uint32_t s, uint32_t v, uint32_t *r, uint32_t *g, uint32_t *b);
+
+#ifdef __cplusplus
+}
+#endif