/*	Soft UART on TA1-CCR0	*/
/*	A. Norman	*/

#define	Uchar	unsigned char
#define TxD		BIT7		//P2.7, XOUT on Launchpad
#define Baudrate 0x80		//0x680 for 9600; 0x80 for 115200

Uchar buff_Tx[64];
Uchar *ptr_Tx;
Uchar BiTcntr;
/*		Somwhere in main()		*/
ptr_Tx = (Uchar *)buff.Tx_Data;
/********************************/

void initIO(void);
void initTA1(void);
void uartTx(Uchar byte);

void initIO(void){
    P2SEL &= ~TxD;
    P2SEL2 &= ~TxD;
    P2DIR |= TxD;
	P2OUT |= TxD;
}

void initTA1(void){
	TA1CTL = TACLR;
	TA1CTL = TASSEL_2 + ID_0;
	TA1CCR0 = Baudrate;
	TA1CCTL0 |= CCIE;
}

void uartTx(Uchar byte){
	*(ptr_Tx) = byte;
	BiTcntr = 9;
	TA1CTL |= MC_1;
}

#pragma vector=TIMER1_A0_VECTOR
__interrupt void Timer1_A0(void){
	switch (BiTcntr){
	case 9:
		P2OUT &= ~TxD;				//uart operation
		txByte = *(ptr_Tx);
		BiTcntr--;
		break;
	default:
		if (txByte & 0x01){
			P2OUT |= TxD;			//uart operation
		}else{
			P2OUT &= ~TxD;			//uart operation
		}
		txByte = txByte>>1;
		BiTcntr--;
		break;
	case 0:
		ptr_Tx++;
		P2OUT |= TxD;				//uart operation
		TA1CTL &= ~MC_1;
//		_BIC_SR_IRQ(CPUOFF);		// Exit LPM0 Use if needed
		break;
	}
}