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35 lines
1.0 KiB
C
35 lines
1.0 KiB
C
/*
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* SPDX-FileCopyrightText: 2019-2023 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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#pragma once
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#include <stdint.h>
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#include "esp_adc/adc_cali_scheme.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define COEFF_GROUP_NUM 4
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#define TERM_MAX 5
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typedef struct {
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uint8_t term_num; ///< Term number of the algorithm formula
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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)
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const int32_t (*sign)[COEFF_GROUP_NUM][TERM_MAX]; ///< Sign of each term
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} cali_chars_second_step_t;
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/**
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* @brief Assign the second step coefficients for curve calibration
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*
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* @param config the curve fitting configuration
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* @param ctx the context pointer of the second step configuration structure
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*/
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void curve_fitting_get_second_step_coeff(const adc_cali_curve_fitting_config_t *config, cali_chars_second_step_t *ctx);
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#ifdef __cplusplus
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}
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#endif
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