#include msp430x14x.h> unsigned char RecBuf[255]; //接收数据缓存
unsigned char *SDat; //指向要发送的数据
unsigned char Rindex; //接收数据计数
unsigned char Tindex; //发送数据计数
unsigned char SendLen; //发送数据长度 void ConfigUart0()
{
P3SEL |= 0x30; // 选择P3.4和P3.5做UART通信端口
ME1 |= UTXE0 + URXE0; // 使能USART0的发送和接受
UCTL0 |= CHAR; // 选择8位字符
UTCTL0 |= SSEL1; // UCLK = SMCLK
UBR00 = 0xD0; // 波特率9600
UBR10 = 0x00; //
UMCTL0 = 0x40; // Modulation
UCTL0 &= ~SWRST; // 初始化UART状态机
IE1 |= URXIE0 + UTXIE0; // 使能USART0的收发中断
}void main(void)
{
unsigned int i;
WDTCTL = WDTPW + WDTHOLD; // 关闭看门狗
BCSCTL1 &= ~XT2OFF; //使TX2有效，TX2上电默认是关闭的
do
{
IFG1 &= ~OFIFG; //清除振荡器失效标志
for(i=0xff;i>0;i--); //延时，待稳定
}
while((IFG1 & OFIFG)!=0); //若振荡器失效标志有效
BCSCTL2 |= SELM1; //使MCLK=XT2
BCSCTL2 |= SELS+divS1; //SMCLK=XT2,4分频，即2MHZ
BoardConfig(0xb8); // 关闭数码管、流水灯和电平转换
ConfigUart0(); //配置UART0
_EINT(); //打开全局中断
while(1)
{
LPM1;
}
} #pragma vector = UART0RX_VECTOR
__interrupt void UART0_RXISR(void)
{
RecBuf[Rindex++] = RXBUF0;
if(RecBuf[Rindex-1]==0xfe) //接收完毕
{
SendLen = Rindex;
Rindex=0;
if(RecBuf[0]==0xfd) //帧头正确
{
LPM1_EXIT;
SDat = RecBuf;
IFG1 |= UTXIFG0; // 设置中断标志，进入发送中断程序
}
}
}#pragma vector = UART0TX_VECTOR
__interrupt void UART0_TXISR(void)
{ if(Tindex < SendLen)
{
TXBUF0 = *(SDat+Tindex);
Tindex++;
}
else
{
Tindex=0;
//LPM1;
} } | 