MSP430F5529: 双通道定时器捕获的问题

Lin Le 说：

即使单独使能CCR2捕获中断也不能进，

是不是您的中断向量没有设置正确？若是可以，请给出单独使用TA2CCR2的相关代码

void TimerA2_Init()
{
//Set 2.5 to capture input direction
    GPIO_setAsPeripheralModuleFunctionInputPin(
                GPIO_PORT_P2,
                GPIO_PIN5
                );

    //Start timer in continuous mode sourced by SMCLK=1.048MHz
    Timer_A_clearTimerInterrupt(TIMER_A2_BASE);
    Timer_A_initContinuousModeParam initContParam = {0};
    initContParam.clockSource = TIMER_A_CLOCKSOURCE_SMCLK;
    initContParam.clockSourceDivider = TIMER_A_CLOCKSOURCE_DIVIDER_1;
    initContParam.timerInterruptEnable_TAIE = TIMER_A_TAIE_INTERRUPT_ENABLE;
    initContParam.timerClear = TIMER_A_DO_CLEAR;
    initContParam.startTimer = false;
    Timer_A_initContinuousMode(TIMER_A2_BASE, &initContParam);


    //Initiate capture mode  --TA2.2
   Timer_A_initCaptureModeParam initCapParam1 = {0};
   initCapParam1.captureRegister=TIMER_A_CAPTURECOMPARE_REGISTER_2;                //根据管脚选择
   initCapParam1.captureMode=TIMER_A_CAPTUREMODE_RISING_EDGE;
   initCapParam1.captureInputSelect=TIMER_A_CAPTURE_INPUTSELECT_CCIxA;
   initCapParam1.synchronizeCaptureSource=TIMER_A_CAPTURE_SYNCHRONOUS;
   initCapParam1.captureInterruptEnable=TIMER_A_CAPTURECOMPARE_INTERRUPT_ENABLE;
   initCapParam1.captureOutputMode=TIMER_A_OUTPUTMODE_OUTBITVALUE;
   Timer_A_initCaptureMode(TIMER_A2_BASE, &initCapParam1);

    Timer_A_enableCaptureCompareInterrupt(TIMER_A2_BASE,
        TIMER_A_CAPTURECOMPARE_REGISTER_2);

    Timer_A_startCounter( TIMER_A2_BASE,
        TIMER_A_CONTINUOUS_MODE
        );

}

// Timer A2 interrupt service routine
#pragma vector=TIMER2_A1_VECTOR
__interrupt void TIMER2_A1_ISR (void)
{
    switch(__even_in_range(TA2IV,14)){
        case TA2IV_TA2CCR1:               //捕获中断
            if(getspeed_L){
                 if(!flag_cap_A2){
                 caphead_A2=TA2CCR1;
                 flag_cap_A2=1;
                 TA2CCTL1&=~0x03;    //COV和标志位清零
                 break;
                 }
                 if(flag_cap_A2){
                  captail_A2=TA2CCR1;
                  capgap_A2=captail_A2-caphead_A2;
                  flag_cap_A2=0;
                  capfinished_A2=1;
                  TA2CCTL1&=~0x03;    //COV和标志位清零
                  break;
                 }
            }
            TA2CCTL1&=~0x03;    //COV和标志位清零
            break;
        case TA2IV_TA2CCR2:               //捕获中断
            //count_impulse++;
            if(getspeed_R){
                 if(!flag_cap_A2){
                 caphead_A2=TA2CCR2;
                 flag_cap_A2=1;
                 TA2CCTL2&=~0x03;    //COV和标志位清零
                 break;
                 }
                 if(flag_cap_A2){
                  captail_A2=TA2CCR2;
                  capgap_A2=captail_A2-caphead_A2;
                  flag_cap_A2=0;
                  capfinished_A2=1;
                  TA2CCTL2&=~0x03;    //COV和标志位清零
                  break;
                 }
            }
            TA2CCTL2&=~0x03;    //COV和标志位清零
            break;
        case TA2IV_TAIFG:                //溢出中断
             if(flag_cap_A2)
                 ovcount_A2++;
             break;
       default: break;
    }
}

单独使用的代码如上

就您目前给出的代码，并没有发现什么问题。您是在launchpad上测试的吗？

若是可以，能否给出/私信一下工程？我在开发板上测试一下

testCCR.rar

当前测试工程如上，使用的是msp4305529launchpad开发板，刚刚测试还是相同的问题，同时检查发现P2.5（即TA2.2）始终为接地状态，导致无法触发捕获中断（已排除外部电路连接）

目前我是使用寄存器的例程来修改的，您可以在开发板上连接 P2.2 和 P2.4

因为目前对MSP430,我还是比较习惯寄存器例程

代码如下，请您对照一下相关配置

#include <msp430.h>

volatile unsigned int counter;
volatile unsigned int prev_counter;
unsigned int difference;

int main(void)
{

    WDTCTL = WDTPW | WDTHOLD;

    // CAPTURE INPUT
    P2DIR &= ~BIT4;
    P2SEL |= BIT4;


    //PWM OUTPUT
    P2DIR |= BIT0+BIT1;                       // P2.0 and P2.1 output
     P2SEL |= BIT0+BIT1;                       // P2.0 and P2.1 options select
     TA1CCR0 = 512-1;                          // PWM Period
     TA1CCTL1 = OUTMOD_7;                      // CCR1 reset/set
     TA1CCR1 = 384;                            // CCR1 PWM duty cycle
     TA1CCTL2 = OUTMOD_7;                      // CCR2 reset/set
     TA1CCR2 = 128;                            // CCR2 PWM duty cycle
     TA1CTL = TASSEL_2 + MC_1 + TACLR;         // SMCLK, up mode, clear TAR



     //capture config
     TA2CTL = TASSEL_2 + MC_2;
     TA2CCTL1 = CM_3+SCS+CAP+CCIS_0+CCIE;



    while(1) {
         __bis_SR_register(LPM0_bits + GIE);
        __no_operation();
        // break point here
        difference = counter - prev_counter;

        if(TA2CCTL1 & COV) {
          TA2CCTL1 &= ~COV;
        }
    }

}

#pragma vector = TIMER2_A1_VECTOR
__interrupt void TIMER2_A1_ISR (void)
{
  switch(__even_in_range(TA2IV,14))
  {
      case TA2IV_NONE: break;
      case TA2IV_TACCR1:
          prev_counter = counter;
          counter = TA2CCR1;
          __bic_SR_register_on_exit(LPM0_bits + GIE);
          break;
      case TA2IV_TACCR2: break;
      case TA2IV_5: break;
      case TA2IV_6: break;
      case TA2IV_TAIFG: break;
      default: break;

  }
}

很高兴您能解决问题！