STM32F429IIT6单片机I2C的使用（代码）--EEPROM使用安森美的AT24C256（借鉴野火教程）

环境为KEIL5

.h文件

#ifndef _I2C_EE_24C256_H
#define _I2C_EE_24C256_H

#include "stm32f4xx_i2c.h"
#include "stm32f4xx_rcc.h"
#include "stm32f4xx_gpio.h"
#include <stdio.h>
	
#define I2C_OWNADDR  																0X0A
#define I2C_CLOCK_SPEED 														   400000
#define I2C_PageSize           											            64
//定义用哪个I2C
#define EEPROM_I2C1 					  										I2C1
#define EEPROM_I2C1_CLK				  										RCC_APB1Periph_I2C1
//定义GPIO相关
//SDA  PB7  165
#define		EEPROM_I2C1_SDA_GPIO_PORT	  							GPIOB
#define   EEPROM_I2C1_SDA_PIN												GPIO_Pin_7
#define 	EEPROM_I2C1_SDA_GPIO_CLK									RCC_AHB1Periph_GPIOB
#define		EEPROM_I2C1_SDA_GPIO_SOURCE								GPIO_PinSource7
#define		EEPROM_I2C1_SDA_AF												GPIO_AF_I2C1

//SCL  PB8  167
#define		EEPROM_I2C1_SCL_GPIO_PORT	  							GPIOB
#define   EEPROM_I2C1_SCL_PIN												GPIO_Pin_8
#define 	EEPROM_I2C1_SCL_GPIO_CLK									RCC_AHB1Periph_GPIOB
#define		EEPROM_I2C1_SCL_GPIO_SOURCE								GPIO_PinSource8
#define		EEPROM_I2C1_SCL_AF												GPIO_AF_I2C1

#define EEPROM_ADDRESS 															0XA0
/*等待超时时间*/
#define I2CT_FLAG_TIMEOUT         ((uint32_t)0x1000)
#define I2CT_LONG_TIMEOUT         ((uint32_t)(10 * I2CT_FLAG_TIMEOUT))

/*信息输出,可设置输出模式以及debug开关*/
#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)

void EEPROM_GPIO_Init(void);
uint32_t I2C_EE_PageWrite(u8* pBuffer, u8 WriteAddr, u8 NumByteToWrite);
void I2C_EE_WaitEepromStandbyState(void)   ;
uint32_t I2C_EE_BufferRead(u8* pBuffer, u8 ReadAddr, u16 NumByteToRead);
uint32_t I2C_EE_ByteWrite(u8* pBuffer, u8 WriteAddr);
void I2C_EE_BufferWrite(u8* pBuffer, u8 WriteAddr, u16 NumByteToWrite);
uint8_t I2C_Test(void);
#endif

.c文件

#include "i2c_ee_24c256.h"

uint8_t I2c_Buf_Write[128];
uint8_t I2c_Buf_Read[128];
uint8_t I2c_Buf_Read1[128];
uint8_t EEP_Firstpage =0x00;
uint8_t EEP_SecondPage =0x40;

static __IO uint32_t  I2CTimeout = I2CT_LONG_TIMEOUT;   


static uint32_t I2C_TIMEOUT_UserCallback(uint8_t errorCode);

//gpio初始化
void EEPROM_GPIO_Init(void)
{
	GPIO_InitTypeDef GPIO_InitStruct;
	
	//使能I2C1的GPIO  PB7  PB8时钟
	//GPIO时钟
	RCC_AHB1PeriphClockCmd(EEPROM_I2C1_SDA_GPIO_CLK|EEPROM_I2C1_SCL_GPIO_CLK,ENABLE);
	
	//连接PB7到SDA-----复用功能
	GPIO_PinAFConfig(EEPROM_I2C1_SDA_GPIO_PORT,EEPROM_I2C1_SDA_GPIO_SOURCE,EEPROM_I2C1_SDA_AF);
	//连接PB8到SCL
	GPIO_PinAFConfig(EEPROM_I2C1_SCL_GPIO_PORT,EEPROM_I2C1_SCL_GPIO_SOURCE,EEPROM_I2C1_SCL_AF);
	
	//GPIO初始化
	GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;//上拉
	GPIO_InitStruct.GPIO_OType = GPIO_OType_OD;//推挽输出
	GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
	
	//配置SDA为复用功能
	GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;//复用
	GPIO_InitStruct.GPIO_Pin = EEPROM_I2C1_SDA_PIN;
	GPIO_Init(EEPROM_I2C1_SDA_GPIO_PORT,&GPIO_InitStruct);//初始化配置
	
	//配置SCL为复用功能
	GPIO_InitStruct.GPIO_Pin = EEPROM_I2C1_SCL_PIN;
	GPIO_Init(EEPROM_I2C1_SCL_GPIO_PORT,&GPIO_InitStruct);
	
	
	I2C_InitTypeDef I2C_InitStruct;
	//I2C时钟
	RCC_APB1PeriphClockCmd(EEPROM_I2C1_CLK,ENABLE);
	
	I2C_InitStruct.I2C_Mode=I2C_Mode_I2C;
	I2C_InitStruct.I2C_DutyCycle = I2C_DutyCycle_2;
	I2C_InitStruct.I2C_ClockSpeed = I2C_CLOCK_SPEED;
	I2C_InitStruct.I2C_OwnAddress1