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https://github.com/espressif/esp-idf.git
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b1db2721dc
feature(rtc_module):add rtc module 1. add rtc io control API (pull,output and input) 2. add touch pad API (touch pad read and interrupt) 3. add adc1 API (the max width is 12 Bits and support attenuation) 4. add hall sensor API (support hall sensor read ) 5. add dac API (the width is 8 Bits) bugfix(gpio):gpio32 and gpio33 can not output and input the gpio32 and gpio33 is initialize by librtc.a,and gpio_config not initialize the gpio as digital gpio.they can not output and input,when users use gpio32 or gpio33.And there are some problems about others driver ,when they use gpio32 or gpio33 as matrix.
58 lines
1.4 KiB
C
58 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 width is 8bit ,and the voltage max is vdd
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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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/**
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*----------EXAMPLE TO USE DAC------------ *
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* @code{c}
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* dac_out_voltage(DAC_CHANNEL_1,200);//the dac out voltage ≈ 200*vdd/255
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* @endcode
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**/
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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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