大家帮忙看看这段捕获程序有没有问题啊！谢谢！

2019-03-24 13:44发布

站内问答 / TI MCU
14871 0 1557
#include "msp430x14x.h"
unsigned int Signal_Start[16];unsigned int Signal_Stop[16];unsigned int SignalValue[]={0};unsigned int CaptureValue = 0;unsigned int i,j,k,count1,count2 = 0;
int main( void ){// Stop watchdog timer to prevent time out resetWDTCTL = WDTPW + WDTHOLD;P6DIR |= BIT2;P6OUT |= BIT2;for(i=0;i<2000;i++);BCSCTL1 |= DIVA_3;P5DIR |= BIT6 + BIT5;P5SEL |= BIT6 + BIT5; P1SEL |= BIT1; //设置P10 输出 P1DIR &= ~BIT1; //设置P11 输入CCTL0 |= CAP + CM_1 + SCS + CCIS_0 + CCIE; //捕获功能 上升沿捕获 同步捕获 P1.1输入 中断允许TACTL |= TASSEL_2 + MC_2;_EINT();while(1){for(j=0;j<16;j++){if(Signal_Stop[j] > Signal_Start[j]){   SignalValue[k] = Signal_Stop - Signal_Start[j];k++;}}for(j=0;j<k;j++){   CaptureValue = CaptureValue + SignalValue[j];}CaptureValue = CaptureValue/k;}return 0;}
#pragma vector = TIMERA0_VECTOR__interrupt void TimerA0_ISR(void){if(CCTL0 & CCI) //捕获到上升沿  CCI = 0000 0000 0000 1000{Signal_Start[count1++] = TACCR0;CCTL0 = (CCTL0&(~CM_1)) | CM_2; //由上升沿捕获 改为下降沿捕获}   else {Signal_Stop[count2++]  = TACCR0; CCTL0 = (CCTL0&(~CM_2)) | CM_1; //由下升沿捕获 改为上降沿捕获} if(count2 == 16){count1 = 0;   count2 = 0;CCTL0 &= ~CCIE;}}
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