2023-04-27 04:53:48 -04:00
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/*
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* SPDX-FileCopyrightText: 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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#include <stdint.h>
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/**
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* @note Error Calculation
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* Coefficients for calculating the reading voltage error.
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* Four sets of coefficients for atten0 ~ atten3 respectively.
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*
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* For each item, first element is the Coefficient, second element is the Multiple. (Coefficient / Multiple) is the real coefficient.
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*
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* @note {0,0} stands for unused item
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2023-05-05 07:56:44 -04:00
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* @note In case of the overflow, these coefficients are recorded as Absolute Value
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2023-04-27 04:53:48 -04:00
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* @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);
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* @note Above formula is rewritten from the original documentation, please note that the coefficients are re-ordered.
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*/
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const uint64_t adc1_error_coef_atten[4][5][2] = {
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{{487166399931449, 1e16}, {6436483033201, 1e16}, {30410131806, 1e16}, {0, 0}, {0, 0}}, //atten0
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{{8665498165817785, 1e16}, {15239070452946, 1e16}, {13818878844, 1e16}, {0, 0}, {0, 0}}, //atten1
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{{12277821756674387, 1e16}, {22275554717885, 1e16}, {5924302667, 1e16}, {0, 0}, {0, 0}}, //atten2
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{{3801417550380255, 1e16}, {6020352420772, 1e16}, {12442478488, 1e16}, {0, 0}, {0, 0}} //atten3
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};
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/**
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* Term sign
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*/
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const int32_t adc1_error_sign[4][5] = {
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{-1, 1, 1, 0, 0}, //atten0
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{-1, 1, 1, 0, 0}, //atten1
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{-1, 1, 1, 0, 0}, //atten2
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{-1, -1, 1, 0, 0} //atten3
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};
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