main.c

MSP430有许多寄存器来设定程序的频率和周期

//从0开始计数数码管显示0~60，每隔10S二极管亮一下
#include "msp430.h"
#define XT0FF 0X40;
unsigned int i=0,j=0;
unsigned char seg_7[10]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90};
unsigned int bit[8]={0x001,0x0002,0x0004,0x0008,0x0010,0x0020,0x0040,0x0080};
                  //发光二极管点亮顺序数组
int main( void )
{
  // Stop watchdog timer to prevent time out reset
  WDTCTL = WDTPW + WDTHOLD;
  TACTL=TASSEL0+TACLR;
  
  CCTL0=CCIE;
  CCR0=32768;
  TACTL|=MC0;
  P3DIR=0XFF;
  P4DIR=0XFF;
  P5DIR=0XFF;
  P3OUT=0X7E;
  _EINT();
  while(1);
  //return 0;
}
#pragma vector=TIMERA0_VECTOR
__interrupt void TIMERA0_interrupt(void)
{
  i+=1;
  if(i==10)
  {
    i=0;
    j+=1;
    P3OUT ^=bit[j];
      if(j==6)
      {
        j=0;
      
      }
  
  }
P4OUT=seg_7[i];
P5OUT=seg_7[j];

}