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adc_calib: support calibration v2 on esp32c6

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laokaiyao
2023-06-26 10:40:36 +08:00
parent 6fc45d4978
commit f949819976
17 changed files with 180 additions and 123 deletions
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components/esp_adc/curve_fitting_coefficients.h
+20 -19
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@@ -1,33 +1,34 @@
/*
* SPDX-FileCopyrightText: 2019-2021 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2019-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include <stdint.h>
#include "esp_adc/adc_cali_scheme.h"
#ifdef __cplusplus
extern "C" {
#endif
#define COEFF_GROUP_NUM 4
#define TERM_MAX 5
/**
* @note Error Calculation
* Coefficients for calculating the reading voltage error.
* Four sets of coefficients for atten0 ~ atten3 respectively.
*
* For each item, first element is the Coefficient, second element is the Multiple. (Coefficient / Multiple) is the real coefficient.
*
* @note {0,0} stands for unused item
* @note In case of the overflow, these coeffcients are recorded as Absolute Value
* @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);
* @note Above formula is rewritten from the original documentation, please note that the coefficients are re-ordered.
* @note ADC1 and ADC2 use same coeffients
*/
extern const uint64_t adc1_error_coef_atten[COEFF_GROUP_NUM][TERM_MAX][2];
extern const uint64_t adc2_error_coef_atten[COEFF_GROUP_NUM][TERM_MAX][2];
typedef struct {
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
} cali_chars_second_step_t;
/**
* Term sign
* @brief Assign the second step coefficients for curve calibration
*
* @param config the curve fitting configuration
* @param ctx the context pointer of the second step configuration structure
*/
extern const int32_t adc1_error_sign[COEFF_GROUP_NUM][TERM_MAX];
extern const int32_t adc2_error_sign[COEFF_GROUP_NUM][TERM_MAX];
void curve_fitting_get_second_step_coeff(const adc_cali_curve_fitting_config_t *config, cali_chars_second_step_t *ctx);
#ifdef __cplusplus
}
#endif