msp430G2553时钟选择与分频程序-EDA365

嵌入式 > 技术百科 > 详情

msp430G2553时钟选择与分频程序

发布时间：

msp430G2553单片机的时钟选择和分频程序如下：

#include "msp430G2553.h"

#define unchar unsigned char
#define uint unsigned int
uint Fre;

int main( void )
{
// Stop watchdog timer to prevent time out reset
WDTCTL = WDTPW + WDTHOLD;
BCSCTL2 |=SELM_1+DIVM_0;
P1DIR &=~BIT3;
P1REN |=BIT3;
P1OUT |=BIT3;
P1DIR |=BIT0;
P1IE |=BIT3;
P1IES &=~BIT3;
_EINT();
while(1)
{
    P1OUT ^=BIT0;
    __delay_cycles(1000000);
}
}
#pragma vector=PORT1_VECTOR
__interrupt void PORTP13(void)
{
uint temp,pushkey=0;
pushkey=BIT3 & (~P1DIR);
__delay_cycles(100000);
temp=P1IN;
if((~temp) & BIT3==pushkey)
{
     Fre++;
     if(Fre>3) Fre=0;
     switch(Fre)
       {
case 0: DCOCTL=CALDCO_1MHZ;BCSCTL1 = CALBC1_1MHZ;break;
case 1: DCOCTL=CALDCO_8MHZ;BCSCTL1 = CALBC1_8MHZ;break;
case 2: DCOCTL=CALDCO_12MHZ;BCSCTL1 = CALBC1_12MHZ;break;
case 3: DCOCTL=CALDCO_16MHZ;BCSCTL1 = CALBC1_16MHZ;break;
      default:break;
       }
}
P1IFG &=~BIT3;
}

『本文转载自网络,版权归原作者所有,如有侵权请联系删除』

上一篇:测试程序(状态机检测按键）下一篇:msp430f149的呼吸灯的制作

热门文章更多

PZT651T1G的技术参数

msp430G2553时钟选择与分频程序

相关推荐