嵌入式STM32学习：I2C-读写EEPROM2

bsp_i2c_ee.h

#ifndef __I2C_EE_H

#define __I2C_EE_H

#include "stm32f4xx.h"

/* AT24C01/02每页有8个字节 */

#define I2C_PageSize           8

/* AT24C04/08A/16A每页有16个字节 */

//#define I2C_PageSize           16         

/* STM32 I2C 快速模式 */

#define I2C_Speed              400000

/* 这个地址只要与STM32外挂的I2C器件地址不一样即可 */

#define I2C_OWN_ADDRESS7      0X0A   

/*I2C接口*/

#define EEPROM_I2C                          I2C1

#define EEPROM_I2C_CLK                      RCC_APB1Periph_I2C1

#define EEPROM_I2C_CLK_INIT                             RCC_APB1PeriphClockCmd

#define EEPROM_I2C_SCL_PIN                  GPIO_Pin_6                 

#define EEPROM_I2C_SCL_GPIO_PORT            GPIOB                       

#define EEPROM_I2C_SCL_GPIO_CLK             RCC_AHB1Periph_GPIOB

#define EEPROM_I2C_SCL_SOURCE               GPIO_PinSource6

#define EEPROM_I2C_SCL_AF                   GPIO_AF_I2C1

#define EEPROM_I2C_SDA_PIN                  GPIO_Pin_7                  

#define EEPROM_I2C_SDA_GPIO_PORT            GPIOB                       

#define EEPROM_I2C_SDA_GPIO_CLK             RCC_AHB1Periph_GPIOB

#define EEPROM_I2C_SDA_SOURCE               GPIO_PinSource7

#define EEPROM_I2C_SDA_AF                   GPIO_AF_I2C1

/*等待超出时间*/

#define I2CT_FLAG_TIMEOUT         ((uint32_t)0x1000)

#define I2CT_LONG_TIMEOUT         ((uint32_t)(10 * I2CT_FLAG_TIMEOUT))

/*信息输出*/

#define EEPROM_DEBUG_ON         0

#define EEPROM_INFO(fmt,arg...)           printf("<<-EEPROM-INFO->> "fmt"n",##arg)

#define EEPROM_ERROR(fmt,arg...)          printf("<<-EEPROM-ERROR->> "fmt"n",##arg)

#define EEPROM_DEBUG(fmt,arg...)          do{

                                          if(EEPROM_DEBUG_ON)

                                          printf("<<-EEPROM-DEBUG->> [%d]"fmt"n",__LINE__, ##arg);

                                          }while(0)

/* 

 * AT24C02 2kb = 2048bit = 2048/8 B = 256 B

 * 32 pages of 8 bytes each

 *

 * Device Address

 * 1 0 1 0 A2 A1 A0 R/W

 * 1 0 1 0 0  0  0  0 = 0XA0

 * 1 0 1 0 0  0  0  1 = 0XA1 

 */

/* EEPROM Addresses defines */

#define EEPROM_Block0_ADDRESS 0xA0   /* E2 = 0 */

//#define EEPROM_Block1_ADDRESS 0xA2 /* E2 = 0 */

//#define EEPROM_Block2_ADDRESS 0xA4 /* E2 = 0 */

//#define EEPROM_Block3_ADDRESS 0xA6 /* E2 = 0 */

void I2C_EE_Init(void);

void I2C_EE_BufferWrite(u8* pBuffer, u8 WriteAddr, u16 NumByteToWrite);

uint32_t I2C_EE_ByteWrite(u8* pBuffer, u8 WriteAddr);

uint32_t I2C_EE_PageWrite(u8* pBuffer, u8 WriteAddr, u8 NumByteToWrite);

uint32_t I2C_EE_BufferRead(u8* pBuffer, u8 ReadAddr, u16 NumByteToRead);

void I2C_EE_WaitEepromStandbyState(void);

#endif /* __I2C_EE_H */

bap_i2c_ee.c

#include "./i2c/bsp_i2c_ee.h"

#include "./usart/bsp_debug_usart.h"

uint16_t EEPROM_ADDRESS;

static __IO uint32_t  I2CTimeout = I2CT_LONG_TIMEOUT;   

static uint32_t I2C_TIMEOUT_UserCallback(uint8_t errorCode);

/**

  * I2C I配置

  */

static void I2C_GPIO_Config(void)

{

  GPIO_InitTypeDef  GPIO_InitStructure; 

  /*!< EEPROM_I2C Periph clock enable */

  EEPROM_I2C_CLK_INIT(EEPROM_I2C_CLK, ENABLE);

  /*!< EEPROM_I2C_SCL_GPIO_CLK and EEPROM_I2C_SDA_GPIO_CLK Periph clock enable */

  RCC_AHB1PeriphClockCmd(EEPROM_I2C_SCL_GPIO_CLK | EEPROM_I2C_SDA_GPIO_CLK, ENABLE);

  /*!< GPIO configuration */

  /* Connect PXx to I2C_SCL*/

  GPIO_PinAFConfig(EEPROM_I2C_SCL_GPIO_PORT, EEPROM_I2C_SCL_SOURCE, EEPROM_I2C_SCL_AF);

  /* Connect PXx to I2C_SDA*/

  GPIO_PinAFConfig(EEPROM_I2C_SDA_GPIO_PORT, EEPROM_I2C_SDA_SOURCE, EEPROM_I2C_SDA_AF);  

  /*!< Configure EEPROM_I2C pins: SCL */   

  GPIO_InitStructure.GPIO_Pin = EEPROM_I2C_SCL_PIN;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;

  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_NOPULL;

  GPIO_Init(EEPROM_I2C_SCL_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure EEPROM_I2C pins: SDA */

  GPIO_InitStructure.GPIO_Pin = EEPROM_I2C_SDA_PIN;

  GPIO_Init(EEPROM_I2C_SDA_GPIO_PORT, &GPIO_InitStructure);

}

/**

  * I2C 工作模式配置

  */

static void I2C_Mode_Configu(void)

{

  I2C_InitTypeDef  I2C_InitStructure; 

  /* I2C 配置 */

  I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;    

  I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;                            /* 高电平数据稳定，低电平数据变化，I2C时钟线的占空比 */

  I2C_InitStructure.I2C_OwnAddress1 =I2C_OWN_ADDRESS7; 

  I2C_InitStructure.I2C_Ack = I2C_Ack_Enable ;  

  I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit; /* I2C的寻址模式 */

  I2C_InitStructure.I2C_ClockSpeed = I2C_Speed;                             /* 通信速率 */

  I2C_Init(EEPROM_I2C, &I2C_InitStructure);                                       /* I2C初始化 */

  I2C_Cmd(EEPROM_I2C, ENABLE);                                                      /* 使能I2C */

  I2C_AcknowledgeConfig(EEPROM_I2C, ENABLE);  

}

/**

  * I2C外设（EEPROM）初始化

  */

void I2C_EE_Init(void)

{

  I2C_GPIO_Config(); 

  I2C_Mode_Configu();

/* 根据头文件中的定义选择EEPROM要写入的地址 */

#ifdef EEPROM_Block0_ADDRESS

  /* 选择 EEPROM Block0 来写入 */

  EEPROM_ADDRESS = EEPROM_Block0_ADDRESS;

#endif

#ifdef EEPROM_Block1_ADDRESS  

  EEPROM_ADDRESS = EEPROM_Block1_ADDRESS;

#endif

#ifdef EEPROM_Block2_ADDRESS  

  EEPROM_ADDRESS = EEPROM_Block2_ADDRESS;

#endif

#ifdef EEPROM_Block3_ADDRESS  

  EEPROM_ADDRESS = EEPROM_Block3_ADDRESS;

#endif

}

/**

  * @brief   将缓冲区的数据写入到EEPROM中

  * @param   

  *     @arg pBuffer:缓冲区指针

  *     @arg WriteAddr:写地址

  *     @arg NumByteToWrite:写的字节数

  */

void I2C_EE_BufferWrite(u8* pBuffer, u8 WriteAddr, u16 NumByteToWrite)

{

  u8 NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0;

  Addr = WriteAddr % I2C_PageSize;

  count = I2C_PageSize - Addr;

  NumOfPage =  NumByteToWrite / I2C_PageSize;

  NumOfSingle = NumByteToWrite % I2C_PageSize;

  /* If WriteAddr is I2C_PageSize aligned  */

  if(Addr == 0) 

  {

    /* If NumByteToWrite < I2C_PageSize */

    if(NumOfPage == 0) 

    {

      I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);

      I2C_EE_WaitEepromStandbyState();

    }

    /* If NumByteToWrite > I2C_PageSize */

    else  

    {

      while(NumOfPage--)

      {

        I2C_EE_PageWrite(pBuffer, WriteAddr, I2C_PageSize); 

        I2C_EE_WaitEepromStandbyState();

        WriteAddr +=  I2C_PageSize;

        pBuffer += I2C_PageSize;

      }

      if(NumOfSingle!=0)

      {

        I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);

        I2C_EE_WaitEepromStandbyState();

      }

    }

  }

  /* If WriteAddr is not I2C_PageSize aligned  */

  else 

  {

    /* If NumByteToWrite < I2C_PageSize */

    if(NumOfPage== 0) 

    {

      I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);

      I2C_EE_WaitEepromStandbyState();

    }

    /* If NumByteToWrite > I2C_PageSize */

    else

    {

      NumByteToWrite -= count;

      NumOfPage =  NumByteToWrite / I2C_PageSize;

      NumOfSingle = NumByteToWrite % I2C_PageSize;  

      if(count != 0)

      {  

        I2C_EE_PageWrite(pBuffer, WriteAddr, count);

        I2C_EE_WaitEepromStandbyState();

        WriteAddr += count;

        pBuffer += count;

      } 

      while(NumOfPage--)