大神帮忙看下程序吧

只看该作者 · 2014-8-30 23:06

#include <msp430f5529.h>
#include "nokia_5110.h"
//#include "systemclk.h"
unsigned int  new_flag=0,old_flag=0;
unsigned char N1=0;
long time,pluse=0;

void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;                // Stop WDT
  P1DIR |= 0x01;                         // P1.0 output
  P1DIR &=~BIT3;                         //TA0输入捕捉端口(P1.2)
  P1SEL |= BIT3;
// setclock(8);
TA0CTL = TASSEL_2 + MC_2 + TACLR + TAIE;  // ACLK~1MHz, contmode, clear TAR
                                          // enable interrupt
TA0CCTL0 = CM_1+CCIS_0+CAP+SCS+CCIE;
LCD_init();
LCD_ShowFloat(0,1,1000000*pluse/time,1);

  __bis_SR_register(LPM3_bits + GIE);    // Enter LPM3, enable interrupts
  __no_operation();                      // For debugger
}

#pragma vector=TIMER0_A0_VECTOR
__interrupt void TIMER0_A0_ISR(void)
{ if(N1==0)
   {  N1++;
      old_flag = TA0CCR0;}
else
   {  N1++;
      new_flag = TA0CCR0;}
}
// Timer0_A5 Interrupt Vector (TAIV) handler
#pragma vector=TIMER0_A1_VECTOR
__interrupt void TIMER0_A1_ISR(void)
{
  switch(__even_in_range(TA0IV,14))
  {
case  0: break;                      // No interrupt
case  2: break;                      // CCR1 not used
case  4: break;                      // CCR2 not used
case  6: break;                         // reserved
case  8: break;                         // reserved
case 10: break;                         // reserved
case 12: break;                         // reserved
case 14: if(N1==0)
            { pluse=0;}
         else
            { pluse=N1-1;}
         time=new_flag-old_flag;
         N1=0;
         P1OUT ^= 0x01;          // overflow
         break;
default: break;
  }
}

只看该作者 · 2014-8-30 23:07

麻烦看下MSP430F5529测频率的程序哪有问题？

大神帮忙看下程序吧

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