mirror of
https://github.com/espressif/esp-idf.git
synced 2025-11-04 00:51:42 +01:00
451f69cc2e
1. Move i2s reset code from i2s_stop to i2s_start. 2. add RTC API to set sw mode for ADC 3. add description for adc_power_always_on() 4. add lock for i2s dma and RTC ADC functions. 5. add ADC read task in example reported from bbs: https://esp32.com/viewtopic.php?f=13&t=3490&p=17522#p17522 reported from github: https://github.com/espressif/esp-idf/issues/1333
74 lines
2.3 KiB
C
74 lines
2.3 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_ADC1_I2S_PRIVATE_H_
|
|
#define _DRIVER_ADC1_I2S_PRIVATE_H_
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#include "esp_err.h"
|
|
|
|
|
|
/**
|
|
* @brief Force power on for SAR ADC.
|
|
* This function should be called for the scenario in which ADC are controlled by digital function like DMA.
|
|
* When the ADC power is always on, RTC FSM can still be functional.
|
|
* This is an internal API for I2S module to call to enable I2S-ADC function.
|
|
* Note that adc_power_off() can still power down ADC.
|
|
*/
|
|
void adc_power_always_on();
|
|
|
|
/**
|
|
* @brief For I2S dma to claim the usage of ADC1.
|
|
*
|
|
* Other tasks will be forbidden to use ADC1 between ``adc1_i2s_mode_acquire`` and ``adc1_i2s_release``.
|
|
* The I2S module may have to wait for a short time for the current conversion (if exist) to finish.
|
|
*
|
|
* @return
|
|
* - ESP_OK success
|
|
* - ESP_ERR_TIMEOUT reserved for future use. Currently the function will wait until success.
|
|
*/
|
|
esp_err_t adc1_i2s_mode_acquire();
|
|
|
|
/**
|
|
* @brief For ADC1 to claim the usage of ADC1.
|
|
*
|
|
* Other tasks will be forbidden to use ADC1 between ``adc1_adc_mode_acquire`` and ``adc1_i2s_release``.
|
|
* The ADC1 may have to wait for some time for the I2S read operation to finish.
|
|
*
|
|
* @return
|
|
* - ESP_OK success
|
|
* - ESP_ERR_TIMEOUT reserved for future use. Currently the function will wait until success.
|
|
*/
|
|
esp_err_t adc1_adc_mode_acquire();
|
|
|
|
/**
|
|
* @brief to let other tasks use the ADC1 when I2S is not work.
|
|
*
|
|
* Other tasks will be forbidden to use ADC1 between ``adc1_adc/i2s_mode_acquire`` and ``adc1_i2s_release``.
|
|
* Call this function to release the occupation of ADC1
|
|
*
|
|
* @return always return ESP_OK.
|
|
*/
|
|
esp_err_t adc1_lock_release();
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /*_DRIVER_ADC1_I2S_PRIVATE_H_*/
|
|
|