msp430f5529脉宽测量

只看该作者 · 2020-12-1 17:19

用5529进行脉宽测量，中断貌似进了但是没法判断，求解读~
#include
#include "Header_Config.h"
#include "sys.h"

unsigned char overflow = 0,Sum_High_Index = 0,Sum_Rising_Index = 0,CCR_Flag = 0;
long Wide_Rising_Old = 0,Wide_Rising_Cur = 0,Wide_Rising = 0,Wide_Rising_Sum = 0,Wide_Rising_Result = 0;
long Wide_High_Cur = 0,Wide_High = 0,Wide_High_Sum = 0,Wide_High_Result = 0;

void main(void)
{
  volatile unsigned int i;
  WDTCTL = WDTPW + WDTHOLD;                // Stop WDT

  Board_init();
  LCD_Init();

SetVCore(3);
  LFXT_Start(XT1DRIVE_0);    // Use 32.768kHz XTAL as reference
  Init_FLL_Settle(12000, 762);  // Set system clock to (12MHz)
  SFRIFG1 = 0;
  SFRIE1 |= OFIE;

  P1DIR |= 0x01;                         // P1.0 output
  P2DIR &= ~BIT1;
  P2SEL |= BIT1;
  //P2REN |= BIT1;       // Enable P1.4 internal resistance
  P2IFG &= ~BIT1;
  P2IE |= BIT1;

  TA1CCTL1 = CM_3 + SCS + CCIS_0 + CAP + CCIE; // 上升沿和下降沿都捕获
  TA1CTL = TASSEL_2 + MC_2 + TAIE;             // SMCLK, contmode, interrupt

  _EINT();
  while(1)
  {
   if(CCR_Flag)
   {
      CCR_Flag = 0;                      // 捕获结果处理
      Dogs102x6_numDisplay(0, 0, Wide_Rising_Result, 0); // 周期结果
      Dogs102x6_numDisplay(1, 0, Wide_High_Result, 0); // 高电平宽度
   }
  }
}

#pragma vector=TIMER1_A1_VECTOR
__interrupt void TIMER1_A1_ISR(void)
{
  P1OUT ^= 0x01; // Toggle P1.0
  switch(__even_in_range(TA1IV,10))
  {
case  0: break;                         // No interrupt
case  2:
   TA1CCTL1 &= ~CCIFG;
   if((P2IN&BIT0)==BIT0)                                                 // 上升沿引发的中断
   {
      Wide_Rising_Cur = TA1CCR1;                                        // 读取当前所得的最新捕获值
      Wide_Rising =  65536*overflow - Wide_Rising_Old + Wide_Rising_Cur;  // 防止出现溢出
      Wide_Rising_Old = Wide_Rising_Cur;
      overflow = 0;
      Sum_Rising_Index++;
      if(Sum_Rising_Index>4)                                              // 丢掉前几次不稳定数据
      {
      Wide_Rising_Sum += Wide_Rising;
      if(Sum_Rising_Index==12)
      {
         Sum_Rising_Index = 0;
         Wide_Rising_Result = Wide_Rising_Sum>>3;                   // 得出8次捕获平均值
         Wide_Rising_Sum = 0;

         Wide_High_Result = Wide_High_Sum/7;                      // 得出7次高点平捕获平均值，服务于上升沿捕获
         Wide_High_Sum = 0;

         CCR_Flag = 1;                                              // 置捕获完成标志位
      }
      }
   }
   else                                                                   // 下降沿引发的中断,记录高电平宽度
   {
      Wide_High_Cur = TA1CCR1;                                           // 读取当前所得的最新捕获值
      Wide_High =  65536*overflow - Wide_Rising_Old + Wide_High_Cur;    // 防止出现溢出，计算出高电平宽度
      //overflow = 0;                                                    // 此处不清overflow，一个周期后清除
      if(Sum_Rising_Index>4)                                           // 丢掉前几次不稳定数据
      {
      Wide_High_Sum += Wide_High;
      }
   }
   break;                         // CCR1 not used
case  4: break;                         // CCR2 not used
case  6: break;                         // reserved
case  8: break;                         // reserved
case 10:
   overflow++;                                  // overflow
   TA1CTL &= ~CCIFG;
   break;                         // reserved
default: break;
  }
}

msp430f5529脉宽测量

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