STM32库函数操作I2C读写失败

[yyang0514]

芯片：SMT32F103VE
现象：main函数执行到AT24C02_WriteOnebyte(0x8,0xfe); 就死机（无打印输出）。
用开发的例子是能正常工作，用STM32库函数进行操作就无效。
麻烦高手帮我看一下。

#define AT24C02_ADDR	0xA0
#define I2C_Speed 200000

//main函数
int main(void)
{
   RCC_Configuration();	//系统时钟初始化
   GPIO_Configuration();//端口初始化
   USART_Configuration();
   NVIC_Configuration();
   I2C2_Configuration();
   printf("init finish\r\n");
   delay_ms(10);
   AT24C02_WriteOnebyte(0x8,0xfe);
   
   while(1)
   {
     printf("test code=%x\n", AT24C02_ReadOneByte(0x8));
     delay_ms(1000);
   } 
}
//I2C 端口初始化
void GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure; 
    GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_10 | GPIO_Pin_11;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD; 
    GPIO_Init(GPIOB, &GPIO_InitStructure); 
}
//I2C 初始化
void I2C2_Configuration(void)
{ 
  I2C_InitTypeDef  I2C_InitStructure;      
  
  I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
  I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
  I2C_InitStructure.I2C_OwnAddress1 = 0x00;
  I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
  I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
  I2C_InitStructure.I2C_ClockSpeed = I2C_Speed; 
  
 // I2C_ITConfig(I2C2,I2C_IT_EVT|I2C_IT_BUF,ENABLE);	 
  I2C_Init(I2C2, &I2C_InitStructure);
  I2C_Cmd(I2C2, ENABLE); 
  I2C_AcknowledgeConfig(I2C2, ENABLE);
}

[yyang0514]

void AT24C02_WriteOnebyte(u8 addr,u8 dt)
{
   while(I2C_GetFlagStatus(I2C2,I2C_FLAG_BUSY));   
   I2C_GenerateSTART(I2C2, ENABLE);   //delay(0x1ff); //// Send STRAT condition //// 
   while( !I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT) );  /* Test on EV5 and clear it 起始位已经发送 */
   
  I2C_Send7bitAddress(I2C2, AT24C02_ADDR, I2C_Direction_Transmitter); // delay(0x1ff); ////Send 0xA6 for connect ////
  while( !I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) );  /* Test on EV6 and clear it 地址已发送 */ 
  
  I2C_SendData(I2C2, addr);  //delay(0x1ff); //// Send the reg_buffer to write to ////
  while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));  /* Test on EV8 and clear it 发送缓冲区空 */
  
  I2C_SendData(I2C2, dt);// delay(0x1ff);  //// Send the set_buffer to be written ////
  while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));  /* Test on EV8 and clear it 发送缓冲区空 （即发完了）*/
  
  I2C_GenerateSTOP(I2C2, ENABLE); //// Send STOP condition ////
  delay_ms(10);
}

u8 AT24C02_ReadOneByte(u8 addr)
{
	u8 RxData;
	I2C_Cmd(I2C2, ENABLE);
	while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY));
	I2C_GenerateSTART(I2C2, ENABLE);
	
	while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));
	I2C_Send7bitAddress(I2C2, AT24C02_ADDR, I2C_Direction_Transmitter);

	while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
	
	I2C_SendData(I2C2, addr);  
	
	while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); 
	I2C_GenerateSTART(I2C2, ENABLE);
	
	while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));
	I2C_Send7bitAddress(I2C2, AT24C02_ADDR, I2C_Direction_Receiver);
	
	while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
	
	while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED));
	RxData = I2C_ReceiveData(I2C2);
	I2C_AcknowledgeConfig(I2C2, DISABLE);
	I2C_GenerateSTOP(I2C2, ENABLE);
	
	return RxData;
}

[mangoalx]

这么看比较难。你不能跟踪进去吗？看看死在哪儿了。也可以用示波器检查波形看数据有没有发送，对方有没有ack信号

[dceacho]

一直都是用软件模拟, 硬件读写代码量没减少多少,关键里面太多while,搞不好就死机了

[pathletboy]

stm32的i2c硬件上是有bug的，可以参考以下这2个解决 http://blog.csdn.net/mcu_hong/article/details/8149311 http://bbs.ednchina.com/BLOG_ARTICLE_2154168.HTM

[yyang0514]

非常感谢各位的帮助吗，我先看一下。在汇报情况。