esp-idf/examples/common_components/led_strip/include/led_strip.h

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4.0 KiB
C

// 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"
/**
* @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 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);
/**
* @brief Init the RMT peripheral and LED strip configuration.
*
* @param[in] channel: RMT peripheral channel number.
* @param[in] gpio: GPIO number for the RMT data output.
* @param[in] led_num: number of addressable LEDs.
* @return
* LED strip instance or NULL
*/
led_strip_t * led_strip_init(uint8_t channel, uint8_t gpio, uint16_t led_num);
/**
* @brief Denit the RMT peripheral.
*
* @param[in] strip: LED strip
* @return
* - ESP_OK
* - ESP_FAIL
*/
esp_err_t led_strip_denit(led_strip_t *strip);
#ifdef __cplusplus
}
#endif