#include "uart.h"

void serial_init()
{
	P1SEL = BIT1 + BIT2;			// Set P1.1 to RXD and P1.2 to TXD
	P1SEL2 = BIT1 + BIT2;			//

	UCA0CTL1 |= UCSSEL_2;			// Have USCI use SMCLK AKA main CLK
	UCA0BR0 = BR0_BD_4800;			// 4800 baud
	UCA0BR1 = BR1_BD_4800;
	UCA0MCTL = UCBRS_1;				// Modulation UCBRSx = 1
	UCA0CTL1 &= ~UCSWRST;			// Start USCI
	IE2 |= UCA0RXIE;				// Enable USCI0 RX interrupt
}

void serial_putch(char c) {
	while ( !(IFG2 & UCA0TXIFG) ) ;		// Wait if there is a transmission ongoing
	UCA0TXBUF = c;						// Put the char into the UART TX buffer
}

void serial_puts(const char *ptr) {
	while(*ptr) {						// Go until we are at the NULL
		serial_putch(*(ptr++));			// put out the single char
	}
}

unsigned char uart_getc()
{
	while (!(IFG2&UCA0RXIFG)); // USCI_A0 RX buffer ready?
	return UCA0RXBUF;
}