kopia lustrzana https://github.com/espressif/esp-idf
43 wiersze
1.1 KiB
C
43 wiersze
1.1 KiB
C
/*
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* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "ulp_riscv_adc.h"
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#include "esp_err.h"
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#include "esp_check.h"
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#include "esp_log.h"
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#include "driver/adc.h"
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#include "hal/adc_hal_common.h"
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#include "esp_private/esp_sleep_internal.h"
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/* Will be refactored when ADC NG is merged, TODO IDF-5513 */
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extern esp_err_t adc1_rtc_mode_acquire(void);
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extern uint32_t get_calibration_offset(adc_unit_t adc_n, adc_channel_t chan);
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static const char *TAG = "ulp_riscv_adc";
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esp_err_t ulp_riscv_adc_init(const ulp_riscv_adc_cfg_t *cfg)
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{
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esp_err_t ret = ESP_OK;
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ESP_GOTO_ON_FALSE(cfg, ESP_ERR_INVALID_ARG, err, TAG, "cfg == NULL");
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ESP_GOTO_ON_FALSE(cfg->adc_n == ADC_UNIT_1, ESP_ERR_INVALID_ARG, err, TAG, "Only ADC_UNIT_1 is supported for now");
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adc1_config_channel_atten(cfg->channel, cfg->atten);
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adc1_config_width(cfg->width);
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//Calibrate the ADC
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uint32_t cal_val = get_calibration_offset(cfg->adc_n, cfg->channel);
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adc_hal_set_calibration_param(cfg->adc_n, cal_val);
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adc1_rtc_mode_acquire();
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esp_sleep_enable_adc_tsens_monitor(true);
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err:
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return ret;
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}
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