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问 请问,如何在iar C-compile 中来仿真串口?多谢先, 答 1: extern unsigned char UartRxc,RxOk,TxOk,BitCnt;
extern unsigned int UartTxc;
void TAInit(void)
{
CCTL0=OUT; // TXD Idle as Mark
TACTL=TASSEL1+MC1; // SMCLK, 10 Continuous mode: the timer counts up to 0FFFFh

}


void RxReady(void)
{
BitCnt = 8;
CCTL0 = SCS +OUTMOD0 + CM1 + CAP +CCIE;// CCI0A input pin+ CCIS0
RxOk=1;
}

void TxByte(void)
{
CCR0 += Bitime;
UartTxc |= 0x0100; //0000 000* xxxx xxxx add stop bit
UartTxc <<= 1; //0000 00*x xxxx xxx0 add start bit
BitCnt = 10; //1+8+1
CCTL0 = OUTMOD0 + CCIE;
return;
}

#pragma vector=TIMERA0_VECTOR
__interrupt void TA0_ISR (void)
{ CCR0 += Bitime;
if ((CCTL0 & SCS) !=0) //Rx
{ if ((CCTL0 & CAP) !=0) {CCTL0 &= ~CAP;CCR0 += Bitime_5; return;} //Start Bit,delay 1.5 Bittime
else { UartRxc >>=1; //Receive a bit
if ((CCTL0 & SCCI) !=0) UartRxc |= 0x80;
BitCnt--;
if (BitCnt ==0) {RxOk=2;CCTL0 &= ~CCIE;} //Receive over, disable Ta0 interrupt
return;
}
} else { if (BitCnt==0) {TxOk=1;CCTL0 &= ~CCIE;} //Tx over, disable Ta0 interrupt
else { CCTL0 &= ~OUTMOD2;
if ((UartTxc & 0x01) != 0) CCTL0 |= OUTMOD2;
BitCnt--;
}
}
}