uart.c

M430~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~··要的人看

#include <MSP430X14X.h>
#include "UART.h"

void Init_CLK(void)
{
    unsigned int i;
    BCSCTL1 = 0X00;			//将寄存器的内容清零
					//XT2震荡器开启
					//LFTX1工作在低频模式
					//ACLK的分频因子为1
					
    do 
    {
	IFG1 &= ~OFIFG;                       // 清除OSCFault标志
	for (i = 0x20; i > 0; i--);                
    }
    while ((IFG1 & OFIFG) == OFIFG);      // 如果OSCFault =1   
					
    BCSCTL1 &= ~(XT2OFF + XTS);//open XT2, LFTX2 select low frequency 
    BCSCTL1 |= RSEL0 + RSEL1 + RSEL2; //DCO Rsel=7(Freq=3200k/25摄氏度）  
    BCSCTL1 |= 0x07;
    BCSCTL2 += SELM1;		//MCLK的时钟源为TX2CLK，分频因子为1
    BCSCTL2 += SELS;		//SMCLK的时钟源为TX2CLK，分频因子为1
    
}
void Init_UART0(void)
{
    U0CTL = 0X00;	//将寄存器的内容清零
    U0CTL += CHAR;	//数据位为8bit
    
    U0TCTL = 0X00;	//将寄存器的内容清零
    U0TCTL += SSEL1;	//波特率发生器选择SMCLK
    
    UBR0_0 = 0X45;	//波特率为115200
    UBR1_0 = 0X00;
	
    UMCTL_0 = 0X49;	//调整寄存器
    
    ME1 |= UTXE0 + URXE0; //使能UART0的TXD和RXD
    IE1 |= URXIE0;	//使能UART0的RX中断
    IE1 |= UTXIE0;	//使能UART0的TX中断
    
    P3SEL |= BIT4;	//设置P3.4为UART0的TXD
    P3SEL |= BIT5;	//设置P3.5为UART0的RXD
    
    P3DIR |= BIT4;	//P3.4为输出管脚
    
    return;
}
void Init_UART1(void)
{
    U1CTL = 0X00;	//将寄存器的内容清零
    U1CTL += CHAR;	//数据位为8bit
    
    U1TCTL = 0X00;	//将寄存器的内容清零
    U1TCTL += SSEL1;	//波特率发生器选择SMCLK
    
    UBR0_1 = 0X45;	//波特率为115200
    UBR1_1 = 0X00;
    UMCTL_1 = 0X00;	
    
    ME2 |= UTXE1 + URXE1; //使能UART1的TXD和RXD
    IE2 |= URXIE1;	//使能UART1的RX中断
    IE2 |= UTXIE1;	//使能UART1的TX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;
}