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54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef _DRIVER_DAC_H_
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#define _DRIVER_DAC_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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#include "esp_err.h"
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typedef enum {
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DAC_CHANNEL_1 = 1, /*!< DAC channel 1 is GPIO25 */
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DAC_CHANNEL_2, /*!< DAC channel 2 is GPIO26 */
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DAC_CHANNEL_MAX,
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} dac_channel_t;
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/**
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* @brief Set DAC output voltage.
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*
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* DAC output is 8-bit. Maximum (255) corresponds to VDD.
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*
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* @note When this function is called, function for the DAC
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* channel's GPIO pin is reconfigured for RTC DAC function.
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*
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* @param channel DAC channel
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* @param dac_value DAC output value
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*
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* @return
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* - ESP_OK success
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* - ESP_ERR_INVALID_ARG Parameter error
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*/
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esp_err_t dac_out_voltage(dac_channel_t channel, uint8_t dac_value);
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#ifdef __cplusplus
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}
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#endif
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#endif /*_DRIVER_DAC_H_*/
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