关于硬件I2C的问题

只看该作者 · 2012-4-29 11:40

使用硬件I2C的时候，程序死在这里，怎么办啊
I2C_Send7bitAddress(I2C1, EEPROM_ADDRESS, I2C_Direction_Transmitter);

  /* Test on EV6 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

只看该作者 · 2012-4-29 14:22

你的I2C地址对吗？

只看该作者 · 2012-4-29 15:05

对啊，这回配置对了，0xa0,是没有问题的

只看该作者 · 2012-4-29 15:51

陷入死循环说明SR2寄存器的TRA（数据已发送）、BUSY（总线正在通信）、MSL（主模式）或SR1寄存器的TXE（DR为空）、ADDR（地址已发送）中的某些位没有置位，你检查一下I2C初始化配置是否正确。我看你的上个帖子，I2C初始化的时候没有I2C_AcknowledgeConfig(I2C1,ENABLE);//允许一字节一应答模式。

只看该作者 · 2012-4-29 17:56

应该是I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED函数问题

只看该作者 · 2012-4-29 18:01

我试过了，还是不好使啊，刚才用软件模拟了，结果还是出不来
void IIC_Delay(u16 times)
{
u16 loop,loop1;
for(loop=0;loop<times;loop++)
for(loop1=times;loop1>0;loop1--);
}
void  IIC_SetSclPin(void)
{
GPIO_WriteBit(GPIOB,GPIO_Pin_6,Bit_SET);
}
void IIC_ClrSclPin(void)
{
GPIO_WriteBit(GPIOB,GPIO_Pin_6,Bit_RESET);
}
void IIC_SetSdaPin(void)
{
GPIO_WriteBit(GPIOB,GPIO_Pin_7,Bit_SET);
}
void IIC_ClrSdaPin(void)
{
GPIO_WriteBit(GPIOB,GPIO_Pin_7,Bit_RESET);
}
bool IIC_GetSdaStus(void)
{
bool tmp;

if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_7)&0x01) tmp=TRUE;
else tmp=FALSE;
return tmp;

}
bool IIC_CheckACK(void)
{
return IIC_GetSdaStus();
}
void IIC_SetScl(bool HLow)
{
HLow?IIC_SetSclPin():IIC_ClrSclPin();
}
void IIC_SetSda(bool HLow)
{
HLow?IIC_SetSdaPin():IIC_ClrSdaPin();
}
void IIC_Start(void)
{

// SCL(Low);
IIC_SetScl(LOW);
//  Delay(DelayTime);
IIC_Delay(IIC_DELAYTIME);
//  SDA(Hight);
IIC_SetSda(HIGHT);

//  Delay(DelayTime);
IIC_Delay(IIC_DELAYTIME);
// SCL(Hight);
IIC_SetScl(HIGHT);
//  Delay(DelayTime);
IIC_Delay(IIC_DELAYTIME);
// SDA(Low);
IIC_SetSda(LOW);
//  Delay(DelayTime);
IIC_Delay(IIC_DELAYTIME);
//  SCL(Low);
IIC_SetScl(LOW);

}
void IIC_Stop(void)
{

IIC_SetSda(LOW);

IIC_Delay(IIC_DELAYTIME);
IIC_SetScl(HIGHT);
IIC_Delay(IIC_DELAYTIME);
IIC_SetSda(HIGHT);
IIC_Delay(IIC_DELAYTIME);
IIC_SetScl(LOW);
}
bool IIC_Send(u8 ucVal)
{
bool Ack;
u16 AckLoop;
u8 i;
for(i=0;i<8;i++)
{
IIC_SetScl(LOW);
IIC_Delay(IIC_DELAYTIME);
IIC_SetSda((ucVal & 0x80)?TRUE:FALSE);
IIC_Delay(IIC_DELAYTIME);
IIC_SetScl(HIGHT);
IIC_Delay(IIC_DELAYTIME);
ucVal<<= 1;
}
IIC_SetScl(LOW);
IIC_Delay(IIC_DELAYTIME);
IIC_SetSda(HIGHT);
IIC_Delay(IIC_DELAYTIME);
IIC_SetScl(HIGHT);
Ack = IIC_NOACK;
for(AckLoop=0;AckLoop<ACKCHECKTIME;AckLoop++) //260us
{
if(!IIC_GetSdaStus())
{
Ack = IIC_ACK;
break;
}
IIC_Delay(IIC_DELAYTIME);
}
IIC_SetScl(LOW);
return Ack; //return success=0 / failure=1
}
u8 IIC_Read(bool bACK)
{
u8 Data;
u8 i;
Data = 0;
for(i=0;i<8;i++)
{
Data <<= 1;
IIC_SetScl(LOW);
IIC_Delay(IIC_DELAYTIME);
IIC_SetSda(HIGHT);
IIC_Delay(IIC_DELAYTIME);
IIC_SetScl(HIGHT);
IIC_Delay(IIC_DELAYTIME);
if(IIC_GetSdaStus())
Data |= 1;
else
Data &= 0xfe;
}
IIC_SetScl(LOW);
IIC_Delay(IIC_DELAYTIME);
IIC_SetSda(bACK);
IIC_Delay(IIC_DELAYTIME);
IIC_SetScl(HIGHT);
IIC_Delay(IIC_DELAYTIME);
IIC_SetScl(LOW);
return Data;

}
bool IIC_ByteWrite(u8 DeviceAdd,u8 address,u8 ucVal)
{

   IIC_Start();
if(IIC_Send(DeviceAdd|((address>>7)&0x0e)))//NACK
{
         return IIC_NOACK;
}
IIC_Send((u8)(address&0xff));
IIC_Send(ucVal);
IIC_Stop();

IIC_Delay(IIC_DELAYTIME);
IIC_Delay(IIC_DELAYTIME);
IIC_Delay(20*IIC_DELAYTIME);

return IIC_ACK;
}
u8 IIC_ByteRead(u8 DeviceAdd,u8 address)
{
u8 value;

IIC_Start();
IIC_Send(DeviceAdd|((address>>7)&0x0e));
IIC_Send((u8)(address&0xff));
IIC_Stop();
IIC_Start();
IIC_Send(DeviceAdd|0x01);
value=IIC_Read(IIC_NOACK);
IIC_Stop();
IIC_Delay(IIC_DELAYTIME);
IIC_Delay(IIC_DELAYTIME);
IIC_Delay(IIC_DELAYTIME);

return value;
}
bool IIC_BytesWrite(u8 DeviceAdd,u8 address,u8 *buf,u16 nByte)
{
int lp=0;
for(lp=0;lp<nByte;lp++)
{
IIC_ByteWrite(DeviceAdd,lp+address,*buf++);
}
                     return TRUE;
}
bool IIC_BytesRead(u8 DeviceAdd,u8 address,u8 *buf,u16 nByte)
{
int lp=0;
for(lp=0;lp<nByte;lp++)
{
*buf++=IIC_ByteRead(DeviceAdd,lp+address);
}
                     return TRUE;
}

GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_6 | GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;//复用开漏输出
  GPIO_Init(GPIOB, &GPIO_InitStructure);
这是main函数，我准备将收到的数据通过串口发出来，串口配置是没有问题的
int main(void)
{
RCC_Configuration();
// USART_Configuration();
GPIO_Configuration();
IIC_BytesWrite(0xa0,0xfe,Tx_Buffer,sizeof(Tx_Buffer)-1);
IIC_BytesRead(0xa0,0xfe,Rx_Buffer,sizeof(Rx_Buffer)-1);
// USART_Cmd(USART1, ENABLE);
// USART_SendString(Tx_Buffer,sizeof(Tx_Buffer)-1);
// USART_SendString(Rx_Buffer,sizeof(Rx_Buffer)-1);
while (1);

}