114 lines
3.0 KiB
C
114 lines
3.0 KiB
C
// Copyright 2015-2016 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.
|
|
|
|
#ifndef _DRIVER_DAC_H_
|
|
#define _DRIVER_DAC_H_
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#include <stdint.h>
|
|
#include "esp_err.h"
|
|
#include "soc/dac_channel.h"
|
|
|
|
typedef enum {
|
|
DAC_CHANNEL_1 = 1, /*!< DAC channel 1 is GPIO25 */
|
|
DAC_CHANNEL_2, /*!< DAC channel 2 is GPIO26 */
|
|
DAC_CHANNEL_MAX,
|
|
} dac_channel_t;
|
|
|
|
/**
|
|
* @brief Get the gpio number of a specific DAC channel.
|
|
*
|
|
* @param channel Channel to get the gpio number
|
|
*
|
|
* @param gpio_num output buffer to hold the gpio number
|
|
*
|
|
* @return
|
|
* - ESP_OK if success
|
|
* - ESP_ERR_INVALID_ARG if channal not valid
|
|
*/
|
|
esp_err_t dac_pad_get_io_num(dac_channel_t channel, gpio_num_t *gpio_num);
|
|
|
|
/** @cond */
|
|
/**
|
|
* @brief Set DAC output voltage.
|
|
*
|
|
* @note Function has been deprecated, please use dac_output_voltage instead.
|
|
* This name will be removed in a future release.
|
|
* The difference is that before calling dac_output_voltage, we need to initialize the dac pad by dac_output_enable
|
|
*
|
|
*
|
|
* @param channel DAC channel
|
|
* @param dac_value DAC output value
|
|
*
|
|
* @return
|
|
* - ESP_OK success
|
|
* - ESP_ERR_INVALID_ARG Parameter error
|
|
*/
|
|
esp_err_t dac_out_voltage(dac_channel_t channel, uint8_t dac_value) __attribute__ ((deprecated));
|
|
/** @endcond */
|
|
|
|
/**
|
|
* @brief Set DAC output voltage.
|
|
*
|
|
* DAC output is 8-bit. Maximum (255) corresponds to VDD.
|
|
*
|
|
* @note Need to configure DAC pad before calling this function.
|
|
* DAC channel 1 is attached to GPIO25, DAC channel 2 is attached to GPIO26
|
|
*
|
|
* @param channel DAC channel
|
|
* @param dac_value DAC output value
|
|
*
|
|
* @return
|
|
* - ESP_OK success
|
|
* - ESP_ERR_INVALID_ARG Parameter error
|
|
*/
|
|
esp_err_t dac_output_voltage(dac_channel_t channel, uint8_t dac_value);
|
|
|
|
/**
|
|
* @brief DAC pad output enable
|
|
*
|
|
* @param channel DAC channel
|
|
* @note DAC channel 1 is attached to GPIO25, DAC channel 2 is attached to GPIO26
|
|
* I2S left channel will be mapped to DAC channel 2
|
|
* I2S right channel will be mapped to DAC channel 1
|
|
*/
|
|
esp_err_t dac_output_enable(dac_channel_t channel);
|
|
|
|
/**
|
|
* @brief DAC pad output disable
|
|
*
|
|
* @param channel DAC channel
|
|
* @note DAC channel 1 is attached to GPIO25, DAC channel 2 is attached to GPIO26
|
|
*/
|
|
esp_err_t dac_output_disable(dac_channel_t channel);
|
|
|
|
/**
|
|
* @brief Enable DAC output data from I2S
|
|
*/
|
|
esp_err_t dac_i2s_enable();
|
|
|
|
/**
|
|
* @brief Disable DAC output data from I2S
|
|
*/
|
|
esp_err_t dac_i2s_disable();
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /*_DRIVER_DAC_H_*/
|
|
|