spi1.c

MSP430的SPI接口的例子程序。连接NRF24L01实现定长的数据包通信

/*****************************************************************************
*
* File: spi1.c
* 
* Copyright S. Brennen Ball, 2006-2007
* 
* The author provides no guarantees, warantees, or promises, implied or
*	otherwise.  By using this software you agree to indemnify the author
* 	of any damages incurred by using it.
* 
*****************************************************************************/

#include "spi1.h"
//#include "LPC214x.h"
#include "msp430x22x4.h"
void spi1_open()
{
  //在初始化中打开
}

int spi1_read()
{
  //do nothing
  return 1;
}

unsigned char spi1_send_read_byte(unsigned char byte)
{
	int rec_val;
	
	while (!(IFG2 & UCB0TXIFG));
	UCB0TXBUF = byte;
	
	while (!(IFG2 & UCB0RXIFG));
	rec_val = UCB0RXBUF;
	
	return (unsigned char)rec_val;
}