uart.h

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void Delay_ms(unsigned long nValue)//毫秒为单位，8MHz为主时钟
{
    unsigned long nCount;
    int i;
    unsigned long j;
    nCount = 2667;
    for(i = nValue;i > 0;i--)
    {
    	for(j = nCount;j > 0;j--);
    }
   
}


void Init_CLK(void)
  {
     unsigned int i;
     
     BCSCTL1 &= ~XT2OFF;                         //开启高频晶振
     do                                          //检测高频晶振是否有效
      {
           IFG1 &= ~OFIFG;                       //清除OSCFault标志
	   for (i = 0x20; i > 0; i--);                
      }
     while ((IFG1 & OFIFG) == OFIFG);            //如果OSCFault =1 
     BCSCTL2 |= SELM1;                           //主时钟选择高频晶振 
     BCSCTL2 |= SELS;                            //辅助时钟选择高频晶振   
     return;
  
  }
//GSM串口初始化 
void Init_UART1(void)
  {
     U1CTL |= SPB+CHAR;
     U1TCTL |= SSEL1;
     UBR0_1 = 0X41;	                         // 波特率为9600
     UBR1_1 = 0X03;
     UMCTL_1 = 0X00;	
     ME2 |= UTXE1 + URXE1;                       // 使能UART1的TXD和RXD模块
     U1CTL &= ~SWRST;
     IE2 |= URXIE1;	                         // 使能UART1的RX中断
     P3SEL |= BIT6;	                         // 设置P3.6为UART1的TXD
     P3SEL |= BIT7;	                         // 设置P3.7为UART1的RXD
     P3DIR |= BIT6;	                         // P3.6为输出管脚
     return;
  }
//GPS串口初始化 
void Init_UART0(void)
  {
     U0CTL |= SPB+CHAR;
     U0TCTL |= SSEL1;
     //=====================================//
     UBR0_0 = 0X83;	// 波特率为4800
     UBR1_0 = 0X06;
     UMCTL_0 = 0X6F;	
    //======================================//
    // UBR0_0 = 0Xa1;	// 波特率为19200
    // UBR1_0 = 0X01;
    // UMCTL_0 = 0X00;	
    //======================================//
    // UBR0_1 = 0X41;	// 波特率为9600
    // UBR1_1 = 0X03;
    // UMCTL_1 = 0X00;	
    //=======================================//
     ME1 |= UTXE0 + URXE0;                       // 使能UART1的TXD和RXD模块
     U0CTL &= ~SWRST;
     IE1 |= URXIE0;                       //读写中断使能
     P3SEL |= BIT4;	// 设置P3.4为UART1的TXD
     P3SEL |= BIT5;	// 设置P3.5为UART1的RXD
     P3DIR |= BIT4;	// P3.6为输出管脚
     return;
  }