ST意法半导体中文论坛ST I2C 的例子怎么不能用啊

guanjianguo 发表于 2008-12-17 21:48:33

ST I2C 的例子怎么不能用啊

I2C_GenerateSTART(I2C1, ENABLE);
/* Test on I2C1 EV5 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));

大多数时候死在循环那里啦,

得蜜发表于 2008-12-18 09:59:11

RE:ST I2C 的例子怎么不能用啊

附件里面是什么？:)

私奔发表于 2008-12-18 11:39:23

RE:ST I2C 的例子怎么不能用啊

void I2C_RTC_ByteWrite(u8 pBuffer, u16 WriteAddr)
{
u8 aH,bL;

/* Send START condition */
I2C_GenerateSTART(I2C1, ENABLE);

/* Test on EV5 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));

/* Send RTC address for write */
I2C_Send7bitAddress(I2C1, RTC_ADDRESS, I2C_Direction_Transmitter);

/* Test on EV6 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
bL = WriteAddr & 0x00ff; //高8位地址
aH = WriteAddr >> 8; //低8位地址
/* Send the RTC's 高8位地址 */
I2C_SendData(I2C1, aH);

/* Test on EV8 and clear it */
while(! I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
/* Send the RTC's 低8位地址 */
I2C_SendData(I2C1, bL);

/* Test on EV8 and clear it */
while(! I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

/* Send the current byte */
I2C_SendData(I2C1, pBuffer);

/* Test on EV8 and clear it */
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

/* Send STOP condition */
I2C_GenerateSTOP(I2C1, ENABLE);
}
牛人说这样是好的。说你是否从机没有返回。:)
我代为转述下。

萧星-96138 发表于 2008-12-18 11:44:11

可以做如下修改,把I2C_EE_WaitEepromStandbyState放在前面...

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define I2C_PageSize       16
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/

/* Private function prototypes -----------------------------------------------*/
static void I2C_EE_WaitEepromStandbyState(CPU_INT08U ucAddr);
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name: I2C_EE_WaitEepromStandbyState
* Description : Wait for EEPROM Standby state
* Input       : None
* Output       : None
* Return       : None
*******************************************************************************/
void I2C_EE_WaitEepromStandbyState(CPU_INT08U ucAddr)
{
vu16 SR1_Tmp = 0;
do
{
/* Send START condition */
I2C_GenerateSTART(I2C1, ENABLE);
/* Read I2C1 SR1 register */
SR1_Tmp = I2C_ReadRegister(I2C1, I2C_Register_SR1);
/* Send EEPROM address for write */
I2C_Send7bitAddress(I2C1, ucAddr, I2C_Direction_Transmitter);
}while(!(I2C_ReadRegister(I2C1, I2C_Register_SR1) & I2C_FLAG_ADDR));

/* Clear AF flag */
I2C_ClearFlag(I2C1, I2C_FLAG_AF);
}
/*******************************************************************************
* Function Name: I2C_EE_BufferWrite
* Description : Writes buffer of data to the I2C EEPROM.
* Input       : - pBuffer : pointer to the buffercontaining the data to be
*                written to the EEPROM.
*                - WriteAddr : EEPROM's internal address to write to.
*                - NumByteToWrite : number of bytes to write to the EEPROM.
* Output       : None
* Return       : None
*******************************************************************************/
void I2C_EE_BufferWrite(CPU_INT08U ucDeviceAddr,CPU_INT16U WriteAddr, CPU_INT08U* pBuffer, u16 NumByteToWrite)
{
CPU_INT08U 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(ucDeviceAddr,WriteAddr,pBuffer,NumOfSingle);
}
/* If NumByteToWrite > I2C_PageSize */
else
{
   while(NumOfPage--)
   {
   I2C_EE_PageWrite(ucDeviceAddr,WriteAddr, pBuffer, I2C_PageSize);
   I2C_EE_WaitEepromStandbyState(ucDeviceAddr);
   WriteAddr +=I2C_PageSize;
   pBuffer += I2C_PageSize;
   }
   if(NumOfSingle!=0)
   {
   I2C_EE_PageWrite(ucDeviceAddr,WriteAddr,pBuffer,NumOfSingle);
   }
}
}
/* If WriteAddr is not I2C_PageSize aligned*/
else
{
/* If NumByteToWrite < I2C_PageSize */
if(NumOfPage== 0)
{
   I2C_EE_PageWrite(ucDeviceAddr,WriteAddr, pBuffer, NumOfSingle);
}
/* If NumByteToWrite > I2C_PageSize */
else
{
   NumByteToWrite -= count;
   NumOfPage =NumByteToWrite / I2C_PageSize;
   NumOfSingle = NumByteToWrite % I2C_PageSize;

   if(count != 0)
   {
   I2C_EE_PageWrite(ucDeviceAddr, WriteAddr,pBuffer, count);
   WriteAddr += count;
   pBuffer += count;
   }

   while(NumOfPage--)
   {
   I2C_EE_PageWrite(ucDeviceAddr, WriteAddr, pBuffer,I2C_PageSize);
   WriteAddr +=I2C_PageSize;
   pBuffer += I2C_PageSize;
   }
   if(NumOfSingle != 0)
   {
   I2C_EE_PageWrite(ucDeviceAddr,WriteAddr,pBuffer,NumOfSingle);
   }
}
}
}
/*******************************************************************************
* Function Name: I2C_EE_ByteWrite
* Description : Writes one byte to the I2C EEPROM.
* Input       : - pBuffer : pointer to the buffercontaining the data to be
*                written to the EEPROM.
*                - WriteAddr : EEPROM's internal address to write to.
* Output       : None
* Return       : None
*******************************************************************************/
void I2C_EE_ByteWrite(CPU_INT08U ucDeviceAddr,CPU_INT16U WriteAddr,CPU_INT08U* pBuffer)
{
I2C_EE_WaitEepromStandbyState(ucDeviceAddr);

/* Send STRAT condition */
I2C_GenerateSTART(I2C1, ENABLE);
/* Test on EV5 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
/* Send EEPROM address for write */
I2C_Send7bitAddress(I2C1, ucDeviceAddr, I2C_Direction_Transmitter);

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

/* Send the EEPROM's internal address to write to */
I2C_SendData(I2C1, (WriteAddr&0xff00)>>8);
/* Test on EV8 and clear it */
while(! I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
/* Send the EEPROM's internal address to write to */
I2C_SendData(I2C1, WriteAddr&0xff );
/* Test on EV8 and clear it */
while(! I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
/* Send the byte to be written */
I2C_SendData(I2C1, *pBuffer);

/* Test on EV8 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

/* Send STOP condition */
I2C_GenerateSTOP(I2C1, ENABLE);
}
/*******************************************************************************
* Function Name: I2C_EE_PageWrite
* Description : Writes more than one byte to the EEPROM with a single WRITE
*                cycle. The number of byte can't exceed the EEPROM page size.
* Input       : - pBuffer : pointer to the buffer containing the data to be
*                written to the EEPROM.
*                - WriteAddr : EEPROM's internal address to write to.
*                - NumByteToWrite : number of bytes to write to the EEPROM.
* Output       : None
* Return       : None
*******************************************************************************/
void I2C_EE_PageWrite(CPU_INT08U ucDeviceAddr,CPU_INT16U WriteAddr, CPU_INT08U* pBuffer, CPU_INT08U NumByteToWrite)
{
I2C_EE_WaitEepromStandbyState(ucDeviceAddr);

/* Send START condition */
I2C_GenerateSTART(I2C1, ENABLE);

/* Test on EV5 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));

/* Send EEPROM address for write */
I2C_Send7bitAddress(I2C1, ucDeviceAddr, I2C_Direction_Transmitter);
/* Test on EV6 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
/* Send the EEPROM's internal address to write to */
I2C_SendData(I2C1, (WriteAddr&0xff00)>>8);
/* Test on EV8 and clear it */
while(! I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
/* Send the EEPROM's internal address to write to */
I2C_SendData(I2C1, WriteAddr&0xff );
/* Test on EV8 and clear it */
while(! I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
/* While there is data to be written */
while(NumByteToWrite--)
{
/* Send the current byte */
I2C_SendData(I2C1, *pBuffer);
/* Point to the next byte to be written */
pBuffer++;

/* Test on EV8 and clear it */
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
}
/* Send STOP condition */
I2C_GenerateSTOP(I2C1, ENABLE);
}
/*******************************************************************************
* Function Name: I2C_EE_BufferRead
* Description : Reads a block of data from the EEPROM.
* Input       : - pBuffer : pointer to the buffer that receives the data read
*                from the EEPROM.
*                - ReadAddr : EEPROM's internal address to read from.
*                - NumByteToRead : number of bytes to read from the EEPROM.
* Output       : None
* Return       : None
*******************************************************************************/
void I2C_EE_BufferRead(CPU_INT08U ucDeviceAddr,CPU_INT16U ReadAddr,CPU_INT08U* pBuffer,u16 NumByteToRead)
{

I2C_EE_WaitEepromStandbyState(ucDeviceAddr);
/* Send START condition */
I2C_GenerateSTART(I2C1, ENABLE);

/* Test on EV5 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));

/* In the case of a single data transfer disable ACK before reading the data */
if(NumByteToRead==1)
{
I2C_AcknowledgeConfig(I2C1, DISABLE);
}

/* Send EEPROM address for write */
I2C_Send7bitAddress(I2C1, ucDeviceAddr, I2C_Direction_Transmitter);
/* Test on EV6 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

/* Clear EV6 by setting again the PE bit */
I2C_Cmd(I2C1, ENABLE);
/* Send the EEPROM's internal address to write to */
I2C_SendData(I2C1, (ReadAddr&0xff00)>>8);
/* Test on EV8 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
/* Send the EEPROM's internal address to write to */
I2C_SendData(I2C1, (ReadAddr&0xff));
/* Test on EV8 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

/* Send STRAT condition a second time */
I2C_GenerateSTART(I2C1, ENABLE);

/* Test on EV5 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));

/* Send EEPROM address for read */
I2C_Send7bitAddress(I2C1, ucDeviceAddr, I2C_Direction_Receiver);

/* Test on EV6 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));

/* While there is data to be read */
while(NumByteToRead)
{
/* Test on EV7 and clear it */
if(I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED))
{
   if(NumByteToRead == 2)
   {
   /* Disable Acknowledgement */
   I2C_AcknowledgeConfig(I2C1, DISABLE);
   }
   if(NumByteToRead == 1)
   {
   /* Send STOP Condition */
   I2C_GenerateSTOP(I2C1, ENABLE);
   }

   /* Read a byte from the EEPROM */
   *pBuffer = I2C_ReceiveData(I2C1);
   /* Point to the next location where the byte read will be saved */
   pBuffer++;

   /* Decrement the read bytes counter */
   NumByteToRead--;
}
}
/* Enable Acknowledgement to be ready for another reception */
I2C_AcknowledgeConfig(I2C1, ENABLE);
}

火雷达 发表于 2011-11-19 14:14:09

回复:ST I2C 的例子怎么不能用啊

硬件的I2C好像是有点问题的，最好用软件模拟I2C

页: [1]

ST意法半导体中文论坛's Archiver

ST I2C 的例子怎么不能用啊

RE:ST I2C 的例子怎么不能用啊

RE:ST I2C 的例子怎么不能用啊

可以做如下修改,把I2C_EE_WaitEepromStandbyState放在前面...

回复:ST I2C 的例子怎么不能用啊