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Alex B.
2025-10-07 00:18:25 -04:00
parent 970e081f64
commit 909dddeb77
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121
ESP32-IDF_Temperture-Node-v2/managed_components/espressif__i2c_bus/private_include/i2c_bus_soft.h
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/*
* SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include "i2c_bus.h"
struct i2c_master_soft_bus_t {
gpio_num_t scl_io; /*!< SCL GPIO PIN */
gpio_num_t sda_io; /*!< SDA GPIO PIN */
uint32_t time_delay_us; /*!< Interval between SCL GPIO toggles in microseconds, determining the SCL frequency */
};
typedef struct i2c_master_soft_bus_t *i2c_master_soft_bus_handle_t;
/**
* @brief Allocate an I2C master soft bus
*
* @param conf I2C master soft bus configuration
* @param ret_soft_bus_handle I2C soft bus handle
* @return
* - ESP_OK: I2C master soft bus initialized successfully
* - ESP_ERR_INVALID_ARG: I2C soft bus initialization failed because of invalid argument
* - ESP_ERR_NO_MEM: Create I2C soft bus failed because of out of memory
*/
esp_err_t i2c_new_master_soft_bus(const i2c_config_t *conf, i2c_master_soft_bus_handle_t *ret_soft_bus_handle);
/**
* @brief Delete the I2C master soft bus
*
* @param bus_handle I2C soft bus handle
* @return
* - ESP_OK: Delete I2C soft bus success
* - Otherwise: Some module delete failed
*/
esp_err_t i2c_del_master_soft_bus(i2c_master_soft_bus_handle_t bus_handle);
/**
* @brief Change I2C soft bus frequency
*
* @param bus_handle I2C soft bus handle
* @param frequency I2C bus frequency
* @return
* - ESP_OK: Change I2C soft bus frequency success
* - ESP_ERR_INVALID_ARG: I2C soft bus change frequency failed because of invalid argument
*/
esp_err_t i2c_master_soft_bus_change_frequency(i2c_master_soft_bus_handle_t bus_handle, uint32_t frequency);
/**
* @brief Probe I2C address, if address is correct and ACK is received, this function will return ESP_OK
*
* @param bus_handle I2C soft bus handle
* @param address I2C device address that you want to probe
* @return
* - ESP_OK: I2C device probe successfully
* - ESP_ERR_INVALID_ARG: I2C probe failed because of invalid argument
* - ESP_ERR_NOT_FOUND: I2C probe failed, doesn't find the device with specific address you gave
*/
esp_err_t i2c_master_soft_bus_probe(i2c_master_soft_bus_handle_t bus_handle, uint8_t address);
/**
* @brief Write multiple byte to i2c device with 8-bit internal register/memory address
*
* @param bus_handle I2C soft bus handle
* @param dev_addr I2C device address
* @param mem_address The internal reg/mem address to write to, set to NULL_I2C_MEM_ADDR if no internal address
* @param data_len Number of bytes to write
* @param data Pointer to the bytes to write
* @return
* - ESP_OK: I2C master write success
* - ESP_ERR_INVALID_ARG: I2C master write failed because of invalid argument
* - Otherwise: I2C master write failed
*/
esp_err_t i2c_master_soft_bus_write_reg8(i2c_master_soft_bus_handle_t bus_handle, uint8_t dev_addr, uint8_t mem_address, size_t data_len, const uint8_t *data);
/**
* @brief Write multiple byte to i2c device with 16-bit internal register/memory address
*
* @param bus_handle I2C soft bus handle
* @param dev_addr I2C device address
* @param mem_address The internal reg/mem address to write to, set to NULL_I2C_MEM_16BIT_ADDR if no internal address
* @param data_len Number of bytes to write
* @param data Pointer to the bytes to write
* @return
* - ESP_OK: I2C master write success
* - ESP_ERR_INVALID_ARG: I2C master write failed because of invalid argument
* - Otherwise: I2C master write failed
*/
esp_err_t i2c_master_soft_bus_write_reg16(i2c_master_soft_bus_handle_t bus_handle, uint8_t dev_addr, uint16_t mem_address, size_t data_len, const uint8_t *data);
/**
* @brief Read multiple byte to i2c device with 8-bit internal register/memory address
*
* @param bus_handle I2C soft bus handle
* @param dev_addr I2C device address
* @param mem_address The internal reg/mem address to write to, set to NULL_I2C_MEM_ADDR if no internal address
* @param data_len Number of bytes to read
* @param data Pointer to the bytes to read
* @return
* - ESP_OK: I2C master read success
* - ESP_ERR_INVALID_ARG: I2C master read failed because of invalid argument
* - Otherwise: I2C master read failed
*/
esp_err_t i2c_master_soft_bus_read_reg8(i2c_master_soft_bus_handle_t bus_handle, uint8_t dev_addr, uint8_t mem_address, size_t data_len, uint8_t *data);
/**
* @brief Read multiple byte to i2c device with 16-bit internal register/memory address
*
* @param bus_handle I2C soft bus handle
* @param dev_addr I2C device address
* @param mem_address The internal reg/mem address to write to, set to NULL_I2C_MEM_16BIT_ADDR if no internal address
* @param data_len Number of bytes to read
* @param data Pointer to the bytes to read
* @return
* - ESP_OK: I2C master read success
* - ESP_ERR_INVALID_ARG: I2C master read failed because of invalid argument
* - Otherwise: I2C master read failed
*/
esp_err_t i2c_master_soft_bus_read_reg16(i2c_master_soft_bus_handle_t bus_handle, uint8_t dev_addr, uint16_t mem_address, size_t data_len, uint8_t *data);