mirror of
https://github.com/Arthur-cai/Soft_I2C_Driver.git
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73c488f822
1. 支持时钟延展 2. 支持400KHz速率(不同平台移植可能需要手动调整) 3. 支持GD32F30x平台和STM32F10x平台 4. 通过驱动注册的方式使用 5. lib文件夹为GD和STM的标准库 6. dsview文件夹为逻辑分析仪抓取波形 7. 驱动文件为 bsp_soft_i2c.c, bsp_soft_i2c.h, bsp_soft_i2c_private.h Signed-off-by: ArthurCai <arthurcai_c@163.com>
117 lines
4.0 KiB
C
117 lines
4.0 KiB
C
/**
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* @brief 软件模拟I2C驱动私有头文件
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* @file bsp_soft_i2c_private.h
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* @version 1.0
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* @author arthur.cai (arthurcai_c@163.com)
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* @date 2024-01-27 01:48:48
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* @copyright Copyright (c) ArthurCai 2023 - 2024. All rights reserved.
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*
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* @details
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* @par 修改日志:
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* <table>
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* <tr><th>Date <th>Author <th>Description
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* <tr><td>2024-01-27 01:48:48 <td>arthur.cai <td>创建文件
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*/
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#ifndef BSP_SOFT_I2C_PRIVATE_H
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#define BSP_SOFT_I2C_PRIVATE_H
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#include <stdint.h>
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/**
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* @brief 软件模拟 I2C 通用宏定义
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* @addtogroup SOFT_I2C_COMM_DEF
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* @{
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*/
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#define SOFT_I2C_SET_PIN(port, pin) \
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(*(volatile uint32_t *)(uint32_t)((port) + 0x10U)) = (uint32_t)(pin)
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#define SOFT_I2C_RESET_PIN(port, pin) \
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(*(volatile uint32_t *)(uint32_t)((port) + 0x14U)) = (uint32_t)(pin)
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#define SOFT_I2C_READ_PIN(port, pin) \
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(*(volatile uint32_t *)(uint32_t)((port) + 0x08U)) & (uint32_t)(pin)
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#define SOFT_I2C_ENABLE_GPIO_CLK(gpioClk) \
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(*(volatile uint32_t *)(uint32_t)(0x40021000U + 0x18U)) |= (uint32_t)(gpioClk)
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#if defined(GD32F30X_HD) || defined(GD32F30X_CL) || defined(GD32F30X_XD)
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#define SOFT_I2C_DELAY_CYCLE (10U) ///< 延时周期数
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#elif defined(STM32F10X_HD) || defined(STM32F10X_MD) || defined(STM32F10X_CL)
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#define SOFT_I2C_DELAY_CYCLE (1U) ///< 延时周期数
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#else
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#define SOFT_I2C_DELAY_CYCLE (1U) ///< 延时周期数
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#endif
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#define SOFT_I2C_LEVEL_HIGH (1U) ///< 高电平
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#define SOFT_I2C_LEVEL_LOW (0U) ///< 低电平
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#define SOFT_I2C_ACK SOFT_I2C_LEVEL_LOW ///< I2C应答信号(低电平)
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#define SOFT_I2C_NACK SOFT_I2C_LEVEL_HIGH ///< I2C非应答信号(高电平)
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#define SOFT_I2C_WRITE (0U) ///< 写操作
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#define SOFT_I2C_READ (1U) ///< 读操作
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#define SOFT_I2C_REG_ADDR_LEN_1 (1U) ///< 1字节寄存器地址长度
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#define SOFT_I2C_REG_ADDR_LEN_2 (2U) ///< 2字节寄存器地址长度
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/*
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* @}
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*/
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/**
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* @brief 软件模拟 I2C 位操作
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* @addtogroup SOFT_I2C_BIT_OPERATION
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* @{
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*/
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#define SOFT_I2C_GET_MSB_BIT(data) (((data) >> 7) & 0x01) ///< 获取最高位
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#define SOFT_I2C_GET_LOW_BYTE(data) (uint8_t)((data) & 0xFF) ///< 获取低字节
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/*
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* @}
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*/
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/**
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* @brief 软件模拟 I2C 等待 SCL 释放
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*
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* @param [in] p_i2c I2C结构体指针
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* @param [in] waitCnt 等待次数, 必须在前文声明
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*
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* @details 用于开启时钟延展功能, 等待从机释放时钟线
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*/
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#define SOFT_I2C_WAIT_SCL_RELEASE(p_i2c, waitCnt) \
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while (waitCnt > 0 && \
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soft_i2c_read_gpio(&p_i2c->scl) == SOFT_I2C_LEVEL_LOW) { \
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waitCnt--; \
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}
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/**
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* @brief 软件模拟 I2C 定义消息
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*
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* @param [in] msgName 消息名称
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* @param [in] slaveAddr 从机地址
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* @param [in] regAddr 寄存器地址
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* @param [in] regAddrLen 寄存器地址长度(字节)
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* @param [in] pdata 数据指针
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* @param [in] dataLen 数据长度(字节)
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*
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* @details
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* @par 示例:
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* @code
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*
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* @endcode
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*/
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#define SOFT_I2C_DEF_MSG(msgName, slaveAddr, regAddr, regAddrLen, pdata, dataLen, rwFlag) \
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SOFT_I2C_MSG_T msgName = {slaveAddr, regAddr, regAddrLen, rwFlag, dataLen, pdata}
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief 软件模拟 I2C 消息结构体
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*/
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typedef struct _SOFT_I2C_MSG_T {
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uint32_t slaveAddr; ///< 从机地址(8位地址)
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uint32_t regAddr; ///< 寄存器地址
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uint32_t regAddrLen; ///< 寄存器地址长度(字节)
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uint32_t rwFlag; ///< 读写标志(SOFT_I2C_WRITE 或 SOFT_I2C_READ)
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uint32_t dataLen; ///< 数据长度(字节)
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uint8_t *pdata; ///< 数据指针
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} SOFT_I2C_MSG_T, *P_SOFT_I2C_MSG_T;
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#ifdef __cplusplus
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}
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#endif
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#endif // BSP_SOFT_I2C_PRIVATE_H
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