三星2440 IIC驱动的问题
因为要控温，所以要不停的通过IIC接口向从机写数据，就出问题了，有时写不进去，查了一下是因为IICCON[4]中断位没有清0，不知为什么，哪位高手遇到过这个问题，怎么解决的？
void WrIIC(__u8 slvAddr, __u8 cmd, __u16 data)
{
IICCtrl.iicMode = WRDATA;
IICCtrl.iicPt = 0;
IICCtrl.iicData[0] = (__u8)cmd;
IICCtrl.iicData[2] = (__u8)(data & 0xFF);
IICCtrl.iicData[1] = (__u8)((data & 0xFF00) >> 8);
IICCtrl.iicDataCount = 3;
//RETAILMSG(1, (TEXT("WrIIC::data0 = 0x%x, data1 = 0x%x, data2 = 0x%x\r\n"),
//IICCtrl.iicData[0], IICCtrl.iicData[1], IICCtrl.iicData[2]));
v_pIICregs->rIICDS = slvAddr; //
//Master Tx mode, Start(Write), IIC-bus data output enable
//Bus arbitration sucessful, Address as slave status flag Cleared,
//Address zero status flag cleared, Last received bit is 0
v_pIICregs->rIICSTAT = 0xf0;
//Clearing the pending bit isn't needed because the pending bit has been cleared.
//RETAILMSG(1, (TEXT("WrIIC::test1...\r\n")));
while(IICCtrl.iicDataCount != -1)
Run_IicPoll();
//RETAILMSG(1, (TEXT("WrIIC::test2...\r\n")));
//Delay(5);//延时必须加，大概延时6ms左右
IICCtrl.iicMode = POLLACK;
while(1)
{
v_pIICregs->rIICDS = slvAddr;
IICCtrl.iicStatus = 0x100; //To check if _iicStatus is changed
v_pIICregs->rIICSTAT = 0xf0;//Master Tx, Start, Output Enable, Sucessful, Cleared,Cleared, 0
v_pIICregs->rIICCON = 0xaf; //Resumes IIC operation.
while(IICCtrl.iicStatus == 0x100)
{
Run_IicPoll();
Delay(2);
}
Delay(5);
//if(!(_iicStatus & 0x1))
break; //When ACK is received
}
v_pIICregs->rIICSTAT = 0xd0; //Master Tx condition, Stop(Write), Output Enable
v_pIICregs->rIICCON = 0xaf; //Resumes IIC operation.
Delay(1); //Wait until stop condtion is in effect.
//Write is completed.
//RETAILMSG(1, (TEXT("WrIIC::ok...\r\n")));
}
[解决办法]
能不能写进去跟中断没有关系吧，应该跟时序有关
