老是发送不对

1万 · 2013-12-27 20:30

各位大虾，这是我一个MSP430G2433 的SPI（B0）口编的一个初始话程序，大家看看有什么问题没有，老是发送不对。
#define SYNC UCB0CTL0__SPI_bit.UCSYNC
#define MODE0 UCB0CTL0__SPI_bit.UCMODE0
#define MODE1 UCB0CTL0__SPI_bit.UCMODE1
#define MST    UCB0CTL0__SPI_bit.UCMST
#define BIT    UCB0CTL0__SPI_bit.UC7BIT
#define MSB    UCB0CTL0__SPI_bit.UCMSB
#define KPL    UCB0CTL0__SPI_bit.UCCKPL
#define KPH    UCB0CTL0__SPI_bit.UCCKPH
#define SWRST UCB0CTL1__SPI_bit.UCSWRST
#define SSEL0 UCB0CTL1__SPI_bit.UCSSEL0
#define SSEL1 UCB0CTL1__SPI_bit.UCSSEL1
#define BUSY UCB0STAT__SPI_bit.UCBUSY
#define OE    UCB0STAT__SPI_bit.UCOE
#define FE    UCB0STAT__SPI_bit.UCFE
#define LISTEN  UCB0STAT__SPI_bit.UCLISTEN

#define SPIREN IE2_bit.UCB0RXIE
#define SPITEN IE2_bit.UCB0TXIE
#define SPIR    IFG2_bit.UCB0RXIFG
#define SPIT    IFG2_bit.UCB0TXIFG
#define TXBUF    UCB0TXBUF__SPI
#define RXBUF    UCB0RXBUF__SPI

void spi()
{
SWRST=1;                      //关spi
SYNC=1;                      //选择spi
MST=1;                      //spi主机模式
BIT=0;                      //8位数据模式
MSB=0;                      //低位在前

KPL=0;
KPH=0;                      //选择时钟与数据关系

  MODE0=0;
MODE1=0;                   //3线spi

SSEL0=1;
SSEL1=0;                   //选择ACLK时钟

UCB0BR0__SPI=200;
UCB0BR1__SPI=200;             //时钟8分频

SWRST=0;                      //开spi
  }