Texas Instruments MSP430

227
HW_SPI.c
#include "HW_SPI.h"
void HW_SPI_init(void)
{
UCA0CTL1 |= UCSWRST;
UCA0CTL0 = UCCKPH | UCMSB | UCMST | UCMODE_1 | UCSYNC;
UCA0CTL1 = UCSSEL_2 | UCSWRST;
UCA0BR0 = 8;
UCA0CTL1 &= ~UCSWRST;
}
void SPI_write(unsigned char tx_data)
{
while(!(IFG2 & UCA0TXIFG));
UCA0TXBUF = tx_data;
while(UCA0STAT & UCBUSY);
}
unsigned char SPI_read(void)
{
unsigned char rx_data = 0;
while(!(IFG2 & UCA0RXIFG));
rx_data = UCA0RXBUF;
while(UCA0STAT & UCBUSY);
return rx_data;
}
unsigned char SPI_transfer(unsigned char tx_data)
{
unsigned char rx_data = 0;
while(!(IFG2 & UCA0TXIFG));
UCA0TXBUF = tx_data;
while(UCA0STAT & UCBUSY);
while(!(IFG2 & UCA0RXIFG));
rx_data = UCA0RXBUF;
while(UCA0STAT & UCBUSY);
return rx_data;
}
MPL115A1.h
#include <msp430.h>
#include "delay.h"
#include "HW_SPI.h"