kopia lustrzana https://github.com/espressif/esp-idf
60 wiersze
1.6 KiB
C
60 wiersze
1.6 KiB
C
/*
|
|
* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include "sdkconfig.h"
|
|
#include "ulp_adc.h"
|
|
#include "esp_err.h"
|
|
#include "esp_check.h"
|
|
#include "esp_log.h"
|
|
#include "esp_adc/adc_oneshot.h"
|
|
#include "hal/adc_hal_common.h"
|
|
#include "esp_private/esp_sleep_internal.h"
|
|
#include "esp_private/adc_share_hw_ctrl.h"
|
|
|
|
static const char *TAG = "ulp_adc";
|
|
|
|
esp_err_t ulp_adc_init(const ulp_adc_cfg_t *cfg)
|
|
{
|
|
esp_err_t ret = ESP_OK;
|
|
|
|
ESP_GOTO_ON_FALSE(cfg, ESP_ERR_INVALID_ARG, err, TAG, "cfg == NULL");
|
|
ESP_GOTO_ON_FALSE(cfg->adc_n == ADC_UNIT_1, ESP_ERR_INVALID_ARG, err, TAG, "Only ADC_UNIT_1 is supported for now");
|
|
|
|
//-------------ADC1 Init---------------//
|
|
adc_oneshot_unit_handle_t adc1_handle;
|
|
|
|
adc_oneshot_unit_init_cfg_t init_config1 = {
|
|
.unit_id = cfg->adc_n,
|
|
.ulp_mode = cfg->ulp_mode,
|
|
};
|
|
|
|
if (init_config1.ulp_mode == ADC_ULP_MODE_DISABLE) {
|
|
/* Default to RISCV for backward compatibility */
|
|
ESP_LOGI(TAG, "No ulp mode specified in cfg struct, default to riscv");
|
|
init_config1.ulp_mode = ADC_ULP_MODE_RISCV;
|
|
}
|
|
|
|
|
|
ESP_ERROR_CHECK(adc_oneshot_new_unit(&init_config1, &adc1_handle));
|
|
|
|
//-------------ADC1 Config---------------//
|
|
adc_oneshot_chan_cfg_t config = {
|
|
.bitwidth = cfg->width,
|
|
.atten = cfg->atten,
|
|
};
|
|
ESP_ERROR_CHECK(adc_oneshot_config_channel(adc1_handle, cfg->channel, &config));
|
|
|
|
//Calibrate the ADC
|
|
#if SOC_ADC_CALIBRATION_V1_SUPPORTED
|
|
adc_set_hw_calibration_code(cfg->adc_n, cfg->atten);
|
|
#endif
|
|
|
|
esp_sleep_enable_adc_tsens_monitor(true);
|
|
|
|
err:
|
|
return ret;
|
|
}
|