STM8S103k3 I2C问题

只看该作者 · 2010-6-9 16:33

STM8S103k3 I2C在STVD+cosmic下编译成功，
Debug时使用simulator程序正常，用ST—LINK链接到MCU时，
停在while(!I2C_CheckEvent(I2C_EVENT_MASTER_START_SENT))处；
刚接触ST芯片，很多东西都不了解。不知是何故，望高人指点！
uCHAR I2CWriteByte(uCHAR cDevAddr, uCHAR cReg,uCHAR cData)
{
  //I2cInit();
  I2C_GenerateSTART(ENABLE);
  /*EV5*/
  while(!I2C_CheckEvent(I2C_EVENT_MASTER_START_SENT));
  I2C_Send7bitAddress(cDevAddr,I2C_DIRECTION_TX );
   /* Test on EV6 and clear it */
while(!I2C_CheckEvent(I2C_EVENT_MASTER_ADDRESS_ACKED));
I2C_ClearFlag(I2C_FLAG_ADDRESSSENTMATCHED);

  I2C_SendData(cReg);
  while(!I2C_CheckEvent(I2C_EVENT_MASTER_BYTE_TRANSMITTED));

  I2C_SendData(cData);
while(!I2C_CheckEvent(I2C_EVENT_MASTER_BYTE_TRANSMITTED));
  I2C_GenerateSTOP(ENABLE);
}

只看该作者 · 2010-6-9 16:35

STM8S103k3 I2C在STVD+cosmic下编译成功，
Debug时使用simulator程序正常，用ST—LINK链接到MCU时，
停在while(!I2C_CheckEvent(I2C_EVENT_MASTER_START_SENT))处；
刚接触ST芯片，很多东西都不了解。不知是何故，望高人指点！
uCHAR I2CWriteByte(uCHAR cDevAddr, uCHAR cReg,uCHAR cData)
{
  //I2cInit();
  I2C_GenerateSTART(ENABLE);
  /*EV5*/
  while(!I2C_CheckEvent(I2C_EVENT_MASTER_START_SENT));
  I2C_Send7bitAddress(cDevAddr,I2C_DIRECTION_TX );
   /* Test on EV6 and clear it */
while(!I2C_CheckEvent(I2C_EVENT_MASTER_ADDRESS_ACKED));
I2C_ClearFlag(I2C_FLAG_ADDRESSSENTMATCHED);

  I2C_SendData(cReg);
  while(!I2C_CheckEvent(I2C_EVENT_MASTER_BYTE_TRANSMITTED));

  I2C_SendData(cData);
while(!I2C_CheckEvent(I2C_EVENT_MASTER_BYTE_TRANSMITTED));
  I2C_GenerateSTOP(ENABLE);
}

只看该作者 · 2010-6-9 17:55

STM8S103k3 I2C在STVD+cosmic下编译成功，
Debug时使用simulator程序正常，用ST—LINK链接到MCU时，
停在while(!I2C_CheckEvent(I2C_EVENT_MASTER_START_SENT))处；
刚接触ST芯片，很多东西都不了解。不知是何故，望高人指点！

uCHAR I2CWriteByte(uCHAR cDevAddr, uCHAR cReg,uCHAR cData)
{
  //I2cInit();
  I2C_GenerateSTART(ENABLE);
  /*EV5*/
  while(!I2C_CheckEvent(I2C_EVENT_MASTER_START_SENT));
  I2C_Send7bitAddress(cDevAddr,I2C_DIRECTION_TX );
   /* Test on EV6 and clear it */
while(!I2C_CheckEvent(I2C_EVENT_MASTER_ADDRESS_ACKED));
I2C_ClearFlag(I2C_FLAG_ADDRESSSENTMATCHED);

  I2C_SendData(cReg);
  while(!I2C_CheckEvent(I2C_EVENT_MASTER_BYTE_TRANSMITTED));

  I2C_SendData(cData);
while(!I2C_CheckEvent(I2C_EVENT_MASTER_BYTE_TRANSMITTED));
  I2C_GenerateSTOP(ENABLE);
}

1万 · 2010-6-9 21:46

电路图？

只看该作者 · 2010-6-10 09:14

因为硬件还没齐，所以只飞了几根线出来，调试I2C 。
两种环境下，flag1和flag2的值不同，在程序I2CWriteByte前；
除了初始化外；没有对I2C->SR1和I2C->SR2的其余操作，应该不会有硬件置位。
不知何故。望不吝赐教！

ErrorStatus I2C_CheckEvent(I2C_Event_TypeDef I2C_Event)
{

  u8 flag1 = 0;
  u8 flag2 = 0;
  ErrorStatus status = ERROR;

  /* Check the parameters */
  assert_param(IS_I2C_EVENT_OK(I2C_Event));

  flag1 = I2C->SR1;
  flag2 = I2C->SR2;

  /* Check which SRx register must be read */
  if (((u16)I2C_Event & (u16)0x0F00) == 0x0700)
  {
/* Check whether the last event is equal to I2C_EVENT */
if (flag1 & (u8)I2C_Event)
{
   /* SUCCESS: last event is equal to I2C_EVENT */
   status = SUCCESS;
}
else
{
   /* ERROR: last event is different from I2C_EVENT */
   status = ERROR;
}
  }
  else /* Returns whether the status register to check is SR2 */
  {
if (flag2 & (u8)I2C_Event)
{
   /* SUCCESS: last event is equal to I2C_EVENT */
   status = SUCCESS;
}
else
{
   /* ERROR: last event is different from I2C_EVENT */
   status = ERROR;
}
  }

  /* Return status */
  return status;

}