init.c

MSP430系列单片机资料-7册-46.3M-pdf.zip

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

void Init_ADC(void)
{
    P6SEL = 0X07;                //设置P6.0为模拟输入通道
    
    ADC12CTL0 &= ~(ENC);         //设置ENC为0，从而修改ADC12寄存器的值
    ADC12CTL1 |= CSTARTADD_0;	 //转换的起始地址为：ADCMEM0
    
    ADC12MCTL0 = INCH_0;         //设置参考电压分别为AVSS和AVCC，
                                 //输入通道为A0
    ADC12MCTL1 = INCH_1;         //设置参考电压分别为AVSS和AVCC，
                                 //输入通道为A1
    ADC12MCTL2 = INCH_2;         //设置参考电压分别为AVSS和AVCC，
                                 //输入通道为A2
    ADC12MCTL3 = INCH_3;         //设置参考电压分别为AVSS和AVCC，
                                 //输入通道为A3
    ADC12MCTL4 = INCH_4;         //设置参考电压分别为AVSS和AVCC，
                                 //输入通道为A4
    ADC12MCTL5 = INCH_5;         //设置参考电压分别为AVSS和AVCC，
                                 //输入通道为A5
    ADC12MCTL6 = INCH_6          //设置参考电压分别为AVSS和AVCC，
                                 //输入通道为A6
    ADC12MCTL7 = INCH_7 + EOS;   //设置参考电压分别为AVSS和AVCC，
                                 //输入通道为A6
    	    
    ADC12CTL0 |= ADC12ON;
    ADC12CTL0 |= MSC;
    
    
    ADC12CTL1 |= CONSEQ_1;	  //转换模式为：多通道、单次转换
    
    ADC12CTL1 |= ADC12SSEL_1;	  //SMCLK
    ADC12CTL1 |= ADC12DIV_0;	  //时钟分频为1
    ADC12CTL1 |= (SHP);		  //采样脉冲由采用定时器产生
                
    ADC12CTL0 |= ENC;		  //使能ADC转换
    return;
}
void Init_TimerA(void)
{
    TACTL = TASSEL1 + TACLR;      // 选择SMCLK，清除TAR
    TACTL += ID1;			
    TACTL += ID0;                 // 1/8 SMCLK
    CCTL0 = CCIE;	          // CCR0 中断允许
    CCR0 = 4000;		  // 时间间隔为 250Hz
    TACTL |= MC0;		  // 增记数模式
    
    return;
}
void Init_Port(void)
{
    //将P4口和P5口设置为输入方式
    P4DIR = 0;
    P5DIR = 0;
    
    //将P4口和P5口设置为一般I/O口
    P4SEL = 0;
    P5SEL = 0;
    
    // 将P4.0设置为输出方向
    P4DIR |= BIT0;
     
    return;
}
void Init_TimerB(void)
{
    TBCTL = TBSSEL0 + TBCLR;      // 选择ACLK，清除TAR
    TBCCTL0 = CCIE;               // TBCCR0 中断允许
    TBCCR0 = 32768;	          // 时间间隔为 1 s
    
    TBCTL |= MC0;                 // 增记数模式
}
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--);
    }
    return;
}
void Delay_us(unsigned long nValue)//微秒为单位，8MHz为主时钟
{
    int nCount;
    int i;
    int j;
    nCount = 3;
    for(i = nValue;i > 0;i--)
    {
    	for(j = nCount;j > 0;j--);
    }
    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;
}
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
    
}