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https://github.com/espressif/esp-idf.git
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d04a94320a
adc: fix calibration error when waking up from light sleep (v4.3) See merge request espressif/esp-idf!16929
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/*
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* SPDX-FileCopyrightText: 2020-2022 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 "regi2c_ctrl.h"
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#include "esp_attr.h"
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#include <stdint.h>
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#include <freertos/FreeRTOS.h>
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#include <freertos/semphr.h>
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static portMUX_TYPE mux = portMUX_INITIALIZER_UNLOCKED;
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uint8_t IRAM_ATTR regi2c_ctrl_read_reg(uint8_t block, uint8_t host_id, uint8_t reg_add)
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{
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portENTER_CRITICAL_SAFE(&mux);
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uint8_t value = i2c_read_reg_raw(block, host_id, reg_add);
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portEXIT_CRITICAL_SAFE(&mux);
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return value;
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}
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uint8_t IRAM_ATTR regi2c_ctrl_read_reg_mask(uint8_t block, uint8_t host_id, uint8_t reg_add, uint8_t msb, uint8_t lsb)
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{
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portENTER_CRITICAL_SAFE(&mux);
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uint8_t value = i2c_read_reg_mask_raw(block, host_id, reg_add, msb, lsb);
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portEXIT_CRITICAL_SAFE(&mux);
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return value;
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}
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void IRAM_ATTR regi2c_ctrl_write_reg(uint8_t block, uint8_t host_id, uint8_t reg_add, uint8_t data)
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{
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portENTER_CRITICAL_SAFE(&mux);
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i2c_write_reg_raw(block, host_id, reg_add, data);
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portEXIT_CRITICAL_SAFE(&mux);
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}
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void IRAM_ATTR regi2c_ctrl_write_reg_mask(uint8_t block, uint8_t host_id, uint8_t reg_add, uint8_t msb, uint8_t lsb, uint8_t data)
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{
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portENTER_CRITICAL_SAFE(&mux);
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i2c_write_reg_mask_raw(block, host_id, reg_add, msb, lsb, data);
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portEXIT_CRITICAL_SAFE(&mux);
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}
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void IRAM_ATTR regi2c_enter_critical(void)
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{
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portENTER_CRITICAL_SAFE(&mux);
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}
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void IRAM_ATTR regi2c_exit_critical(void)
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{
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portEXIT_CRITICAL_SAFE(&mux);
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}
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/**
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* Restore regi2c analog calibration related configuration registers.
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* This is a workaround, and is fixed on later chips
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*/
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#if REGI2C_ANA_CALI_PD_WORKAROUND
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static DRAM_ATTR uint8_t reg_val[REGI2C_ANA_CALI_BYTE_NUM];
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void IRAM_ATTR regi2c_analog_cali_reg_read(void)
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{
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for (int i = 0; i < REGI2C_ANA_CALI_BYTE_NUM; i++) {
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reg_val[i] = regi2c_ctrl_read_reg(I2C_SAR_ADC, I2C_SAR_ADC_HOSTID, i);
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}
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}
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void IRAM_ATTR regi2c_analog_cali_reg_write(void)
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{
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for (int i = 0; i < REGI2C_ANA_CALI_BYTE_NUM; i++) {
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regi2c_ctrl_write_reg(I2C_SAR_ADC, I2C_SAR_ADC_HOSTID, i, reg_val[i]);
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}
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}
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#endif //#if ADC_CALI_PD_WORKAROUND
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