mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
|
/*
|
||
|
|
* SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: Apache-2.0
|
||
|
|
*/
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
#include "sdkconfig.h"
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
|
||
|
|
#define ESP_ADC_CAL_CURVE_FITTING_SUPPORTED 1
|
||
|
|
|
||
|
|
#define COEFF_GROUP_NUM 4
|
||
|
|
#define TERM_MAX 5
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if ESP_ADC_CAL_CURVE_FITTING_SUPPORTED
|
||
|
|
/**
|
||
|
|
* Calculation parameters used for curve fitting calibration algorithm error
|
||
|
|
*
|
||
|
|
* @note For atten0 ~ 2, error = (K0 * X^0) + (K1 * X^1) + (K2 * X^2); For atten3, error = (K0 * X^0) + (K1 * X^1) + (K2 * X^2) + (K3 * X^3) + (K4 * X^4);
|
||
|
|
* Where X is the `v_cali_input`.
|
||
|
|
*/
|
||
|
|
typedef struct {
|
||
|
|
uint64_t v_cali_input; //Input to calculate the error
|
||
|
|
uint8_t term_num; //Term number of the algorithm formula
|
||
|
|
const uint64_t (*coeff)[COEFF_GROUP_NUM][TERM_MAX][2]; //Coeff of each term. See `adc_error_coef_atten` for details (and the magic number 2)
|
||
|
|
const int32_t (*sign)[COEFF_GROUP_NUM][TERM_MAX]; //Sign of each term
|
||
|
|
} esp_adc_error_calc_param_t;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Calculate the curve fitting error
|
||
|
|
*
|
||
|
|
* @param param see `esp_adc_error_calc_param_t`
|
||
|
|
* @param atten ADC attenuation
|
||
|
|
*/
|
||
|
|
int32_t esp_adc_cal_get_reading_error(const esp_adc_error_calc_param_t *param, uint8_t atten);
|
||
|
|
|
||
|
|
#endif //#if ESP_ADC_CAL_CURVE_FITTING_SUPPORTED
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|