261 lines
6.6 KiB
C
261 lines
6.6 KiB
C
/**
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******************************************************************************
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* @file bsp_i2c_ee.c
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* @author STMicroelectronics
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* @version V1.0
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* @date 2015-xx-xx
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* @brief i2c EEPROM(AT24C02)应用函数bsp
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******************************************************************************
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* @attention
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*
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* 实验平台:秉火 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_ee.h"
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#include "./usart/bsp_debug_usart.h"
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I2C_HandleTypeDef I2C_Handle;
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/**
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* @brief I2C1 I/O配置
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* @param 无
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* @retval 无
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*/
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static void I2C_GPIO_Config(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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// RCC_PeriphCLKInitTypeDef RCC_PeriphClkInit;
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/*使能I2C时钟*/
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EEPROM_I2C_CLK_ENABLE();
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/*使能I2C的IO口时钟*/
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EEPROM_I2C_SCL_GPIO_CLK_ENABLE();
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EEPROM_I2C_SDA_GPIO_CLK_ENABLE();
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/*配置I2C的SCL口*/
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GPIO_InitStructure.Pin = EEPROM_I2C_SCL_PIN;
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GPIO_InitStructure.Mode = GPIO_MODE_AF_OD;
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GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
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GPIO_InitStructure.Pull = GPIO_NOPULL;
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GPIO_InitStructure.Alternate = EEPROM_I2C_SCL_AF;
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HAL_GPIO_Init(EEPROM_I2C_SCL_GPIO_PORT, &GPIO_InitStructure);
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/*配置I2C的SDA口*/
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GPIO_InitStructure.Pin = EEPROM_I2C_SDA_PIN;
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HAL_GPIO_Init(EEPROM_I2C_SDA_GPIO_PORT, &GPIO_InitStructure);
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/* Force the I2C peripheral clock reset */
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EEPROM_I2C_FORCE_RESET();
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/* Release the I2C peripheral clock reset */
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EEPROM_I2C_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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static void I2C_Mode_Config(void)
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{
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/* I2C 配置 */
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I2C_Handle.Instance = EEPROM_I2C;
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I2C_Handle.Init.Timing = 0x40604E73;//100KHz
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I2C_Handle.Init.OwnAddress1 = 0;
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I2C_Handle.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
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I2C_Handle.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
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I2C_Handle.Init.OwnAddress2 = 0;
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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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/* 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 I2C 外设(EEPROM)初始化
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* @param 无
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* @retval 无
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*/
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void I2C_EE_Init(void)
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{
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I2C_GPIO_Config();
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I2C_Mode_Config();
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}
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/**
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* @brief 将缓冲区中的数据写到I2C EEPROM中
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* @param
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* @arg pBuffer:缓冲区指针
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* @arg WriteAddr:写地址
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* @arg NumByteToWrite:写的字节数
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* @retval 无
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*/
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void I2C_EE_BufferWrite(uint8_t* pBuffer, uint8_t WriteAddr, uint16_t NumByteToWrite)
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{
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uint8_t NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0;
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Addr = WriteAddr % EEPROM_PAGESIZE;
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count = EEPROM_PAGESIZE - Addr;
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NumOfPage = NumByteToWrite / EEPROM_PAGESIZE;
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NumOfSingle = NumByteToWrite % EEPROM_PAGESIZE;
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/* If WriteAddr is I2C_PageSize aligned */
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if(Addr == 0)
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{
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/* If NumByteToWrite < I2C_PageSize */
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if(NumOfPage == 0)
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{
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I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
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}
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/* If NumByteToWrite > I2C_PageSize */
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else
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{
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while(NumOfPage--)
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{
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I2C_EE_PageWrite(pBuffer, WriteAddr, EEPROM_PAGESIZE);
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WriteAddr += EEPROM_PAGESIZE;
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pBuffer += EEPROM_PAGESIZE;
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}
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if(NumOfSingle!=0)
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{
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I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
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}
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}
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}
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/* If WriteAddr is not I2C_PageSize aligned */
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else
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{
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/* If NumByteToWrite < I2C_PageSize */
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if(NumOfPage== 0)
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{
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I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
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}
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/* If NumByteToWrite > I2C_PageSize */
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else
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{
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NumByteToWrite -= count;
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NumOfPage = NumByteToWrite / EEPROM_PAGESIZE;
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NumOfSingle = NumByteToWrite % EEPROM_PAGESIZE;
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if(count != 0)
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{
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I2C_EE_PageWrite(pBuffer, WriteAddr, count);
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WriteAddr += count;
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pBuffer += count;
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}
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while(NumOfPage--)
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{
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I2C_EE_PageWrite(pBuffer, WriteAddr, EEPROM_PAGESIZE);
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WriteAddr += EEPROM_PAGESIZE;
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pBuffer += EEPROM_PAGESIZE;
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}
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if(NumOfSingle != 0)
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{
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I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
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}
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}
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}
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}
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/**
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* @brief 写一个字节到I2C EEPROM中
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* @param
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* @arg pBuffer:缓冲区指针
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* @arg WriteAddr:写地址
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* @retval 无
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*/
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uint32_t I2C_EE_ByteWrite(uint8_t* pBuffer, uint8_t WriteAddr)
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{
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HAL_StatusTypeDef status = HAL_OK;
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status = HAL_I2C_Mem_Write(&I2C_Handle, EEPROM_ADDRESS, (uint16_t)WriteAddr, I2C_MEMADD_SIZE_8BIT, pBuffer, 1, 100);
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/* Check the communication status */
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if(status != HAL_OK)
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{
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/* Execute user timeout callback */
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//I2Cx_Error(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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/* Check if the EEPROM is ready for a new operation */
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while (HAL_I2C_IsDeviceReady(&I2C_Handle, EEPROM_ADDRESS, EEPROM_MAX_TRIALS, I2Cx_TIMEOUT_MAX) == HAL_TIMEOUT);
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/* Wait for the end of the transfer */
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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 在EEPROM的一个写循环中可以写多个字节，但一次写入的字节数
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* 不能超过EEPROM页的大小，AT24C02每页有8个字节
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* @param
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* @arg pBuffer:缓冲区指针
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* @arg WriteAddr:写地址
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* @arg NumByteToWrite:写的字节数
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* @retval 无
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*/
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uint32_t I2C_EE_PageWrite(uint8_t* pBuffer, uint8_t WriteAddr, uint8_t NumByteToWrite)
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{
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HAL_StatusTypeDef status = HAL_OK;
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/* Write EEPROM_PAGESIZE */
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status=HAL_I2C_Mem_Write(&I2C_Handle, EEPROM_ADDRESS,WriteAddr, I2C_MEMADD_SIZE_8BIT, (uint8_t*)(pBuffer),NumByteToWrite, 100);
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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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/* Check if the EEPROM is ready for a new operation */
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while (HAL_I2C_IsDeviceReady(&I2C_Handle, EEPROM_ADDRESS, EEPROM_MAX_TRIALS, I2Cx_TIMEOUT_MAX) == HAL_TIMEOUT);
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/* Wait for the end of the transfer */
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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 从EEPROM里面读取一块数据
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* @param
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* @arg pBuffer:存放从EEPROM读取的数据的缓冲区指针
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* @arg WriteAddr:接收数据的EEPROM的地址
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* @arg NumByteToWrite:要从EEPROM读取的字节数
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* @retval 无
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*/
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uint32_t I2C_EE_BufferRead(uint8_t* pBuffer, uint8_t ReadAddr, uint16_t NumByteToRead)
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{
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HAL_StatusTypeDef status = HAL_OK;
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status=HAL_I2C_Mem_Read(&I2C_Handle,EEPROM_ADDRESS,ReadAddr, I2C_MEMADD_SIZE_8BIT, (uint8_t *)pBuffer, NumByteToRead,1000);
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return status;
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}
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/*********************************************END OF FILE**********************/
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