176 lines
5.1 KiB
C
176 lines
5.1 KiB
C
/**
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******************************************************************************
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* @file bsp_i2c.c
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* @author fire
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* @version V1.0
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* @date 2019-xx-xx
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* @brief I2C 配置文件
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******************************************************************************
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* @attention
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*
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* 实验平台:野火 STM32 H750 开发板
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* 论坛 :http://www.firebbs.cn
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* 淘宝 :http://firestm32.taobao.com
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*
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******************************************************************************
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*/
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#include "./i2c/bsp_i2c.h"
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I2C_HandleTypeDef I2C_Handle;
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/**
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* @brief I2C MSP Initialization
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* This function configures the hardware resources used in this example:
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* - Peripheral's clock enable
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* - Peripheral's GPIO Configuration
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* - DMA configuration for transmission request by peripheral
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* - NVIC configuration for DMA interrupt request enable
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* @param hi2c: I2C handle pointer
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* @retval None
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*/
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void HAL_I2C_MspInit(I2C_HandleTypeDef *hi2c)
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{
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GPIO_InitTypeDef GPIO_InitStruct;
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/*##-1- Enable peripherals and GPIO Clocks #################################*/
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/* Enable GPIO TX/RX clock */
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I2Cx_SCL_GPIO_CLK_ENABLE();
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I2Cx_SDA_GPIO_CLK_ENABLE();
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/* Enable I2C1 clock */
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I2Cx_CLK_ENABLE();
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/*##-2- Configure peripheral GPIO ##########################################*/
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/* I2C TX GPIO pin configuration */
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GPIO_InitStruct.Pin = I2Cx_SCL_PIN;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
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GPIO_InitStruct.Alternate = I2Cx_SCL_AF;
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HAL_GPIO_Init(I2Cx_SCL_GPIO_PORT, &GPIO_InitStruct);
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/* I2C RX GPIO pin configuration */
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GPIO_InitStruct.Pin = I2Cx_SDA_PIN;
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GPIO_InitStruct.Alternate = I2Cx_SDA_AF;
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HAL_GPIO_Init(I2Cx_SDA_GPIO_PORT, &GPIO_InitStruct);
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/* Force the I2C peripheral clock reset */
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I2Cx_FORCE_RESET() ;
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/* Release the I2C peripheral clock reset */
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I2Cx_RELEASE_RESET();
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}
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/**
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* @brief I2C 工作模式配置
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* @param 无
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* @retval 无
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*/
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void I2C_Mode_Config(void)
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{
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I2Cx_CLK_ENABLE();
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HAL_I2C_MspInit(&I2C_Handle);
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I2C_Handle.Instance = I2Cx;
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I2C_Handle.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
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I2C_Handle.Init.Timing = 0x40604E73;//100KHz
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I2C_Handle.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
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I2C_Handle.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
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I2C_Handle.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
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I2C_Handle.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
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I2C_Handle.Init.OwnAddress1 = 0 ;
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I2C_Handle.Init.OwnAddress2 = 0;
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/* Init the I2C */
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HAL_I2C_Init(&I2C_Handle);
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HAL_I2CEx_AnalogFilter_Config(&I2C_Handle, I2C_ANALOGFILTER_ENABLE);
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}
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/**
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* @brief Manages error callback by re-initializing I2C.
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* @param Addr: I2C Address
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* @retval None
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*/
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static void I2Cx_Error(uint8_t Addr)
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{
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/* 恢复I2C寄存器为默认值 */
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HAL_I2C_DeInit(&I2C_Handle);
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/* 重新初始化I2C外设 */
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I2C_Mode_Config();
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}
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/**
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* @brief 写寄存器，这是提供给上层的接口
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* @param slave_addr: 从机地址
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* @param reg_addr:寄存器地址
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* @param len：写入的长度
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* @param data_ptr:指向要写入的数据
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* @retval 正常为0，不正常为非0
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*/
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int Sensors_I2C_WriteRegister(unsigned char slave_addr,
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unsigned char reg_addr,
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unsigned short len,
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unsigned char *data_ptr)
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{
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HAL_StatusTypeDef status = HAL_OK;
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status = HAL_I2C_Mem_Write(&I2C_Handle, slave_addr, reg_addr, I2C_MEMADD_SIZE_8BIT,data_ptr, len,I2Cx_FLAG_TIMEOUT);
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/* 检查通讯状态 */
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if(status != HAL_OK)
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{
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/* 总线出错处理 */
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I2Cx_Error(slave_addr);
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}
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while (HAL_I2C_GetState(&I2C_Handle) != HAL_I2C_STATE_READY)
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{
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}
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/* 检查SENSOR是否就绪进行下一次读写操作 */
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while (HAL_I2C_IsDeviceReady(&I2C_Handle, slave_addr, I2Cx_FLAG_TIMEOUT, I2Cx_FLAG_TIMEOUT) == HAL_TIMEOUT);
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/* 等待传输结束 */
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while (HAL_I2C_GetState(&I2C_Handle) != HAL_I2C_STATE_READY)
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{
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}
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return status;
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}
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/**
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* @brief 读寄存器，这是提供给上层的接口
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* @param slave_addr: 从机地址
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* @param reg_addr:寄存器地址
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* @param len：要读取的长度
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* @param data_ptr:指向要存储数据的指针
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* @retval 正常为0，不正常为非0
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*/
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int Sensors_I2C_ReadRegister(unsigned char slave_addr,
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unsigned char reg_addr,
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unsigned short len,
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unsigned char *data_ptr)
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{
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HAL_StatusTypeDef status = HAL_OK;
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status =HAL_I2C_Mem_Read(&I2C_Handle,slave_addr,reg_addr,I2C_MEMADD_SIZE_8BIT,data_ptr,len,I2Cx_FLAG_TIMEOUT);
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/* 检查通讯状态 */
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if(status != HAL_OK)
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{
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/* 总线出错处理 */
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I2Cx_Error(slave_addr);
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}
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while (HAL_I2C_GetState(&I2C_Handle) != HAL_I2C_STATE_READY)
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{
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}
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/* 检查SENSOR是否就绪进行下一次读写操作 */
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while (HAL_I2C_IsDeviceReady(&I2C_Handle, slave_addr, I2Cx_FLAG_TIMEOUT, I2Cx_FLAG_TIMEOUT) == HAL_TIMEOUT);
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/* 等待传输结束 */
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while (HAL_I2C_GetState(&I2C_Handle) != HAL_I2C_STATE_READY)
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{
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}
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return status;
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}
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/*********************************************END OF FILE**********************/
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