TMS320F28027: 使用XDS100V3進行Debug時,未按下執行功能等待約10秒左右後,PWM腳位EPWM2B / GPIO3 會自動變為High,當按下執行功能後腳位動作又恢復正常.

當我在做測試的時候,很碰巧遇到一個情況,就是使用XDS100V3進行Debug後,

尚未執行Run功能,發現有一隻PWM 腳位(EPWM2B / GPIO3 )直接變成High…(因為這樣造成硬體損毀)

當進行程式執行時,狀態就又恢復正常了...

每一次都會發生,都可以重現.差別在使用XDS100V3燒錄後,等待的時間不同,時間大約都在15秒-30秒,

跟當地代理商FAE討論了一些時間都沒辦法解決...不知道有沒有人遇過或是可以給予建議,謝謝.

初始化代碼請參考下列 :

 void devPWM_HVCtrl_Init(CLK_Handle myClk, PWM_Handle myPwm2)
{

    CLK_enablePwmClock(myClk, PWM_Number_2);

    // Set timer period
    PWM_setPeriod(myPwm2, HVCTRL_PWM_COUNT);
    PWM_setPhase(myPwm2, 0x0000);   // Phase is 0
    PWM_setCount(myPwm2, 0x0000);   // Clear counter

    // Setup TBCLK
    PWM_setCounterMode(myPwm2, PWM_CounterMode_Up);
    PWM_disableCounterLoad(myPwm2);                     // Disable phase loading
    PWM_setHighSpeedClkDiv(myPwm2, PWM_HspClkDiv_by_1); // Clock ratio to SYSCLKOUT
    PWM_setClkDiv(myPwm2, PWM_ClkDiv_by_1);

    PWM_setShadowMode_CmpA(myPwm2, PWM_ShadowMode_Shadow);  // Load registers every ZERO
    PWM_setShadowMode_CmpB(myPwm2, PWM_ShadowMode_Shadow);
    PWM_setLoadMode_CmpA(myPwm2, PWM_LoadMode_Zero);
    PWM_setLoadMode_CmpB(myPwm2, PWM_LoadMode_Zero);

    // Setup compare
    PWM_setCmpA(myPwm2, 0);
    PWM_setCmpB(myPwm2, HVCTRL_PWM_COUNT);

    // Set actions
    PWM_setActionQual_CntUp_CmpA_PwmA(myPwm2, PWM_ActionQual_Set);
    PWM_setActionQual_CntUp_CmpB_PwmA(myPwm2, PWM_ActionQual_Clear);

    PWM_setActionQual_CntUp_CmpA_PwmB(myPwm2, PWM_ActionQual_Clear);
    PWM_setActionQual_CntUp_CmpB_PwmB(myPwm2, PWM_ActionQual_Set);


    // Active Low PWMs - Setup Deadband
    devPWM_DeadbandEnable(myPwm2, true);

}

void devPWM_DeadbandEnable(PWM_Handle myPwm1, bool bEn)
{
    if(bEn)
    {

        EALLOW;

        EPwm2Regs.TZFLG.bit.CBC = 0;
        EPwm2Regs.TZFLG.bit.OST = 0;

        EPwm2Regs.TZCTL.bit.DCBEVT1 = 2;
        EPwm2Regs.TZCTL.bit.DCBEVT2 = 2;
        EPwm2Regs.TZCTL.bit.TZB = 2;

        EPwm2Regs.TZFRC.bit.DCBEVT1 = 1;
        EPwm2Regs.TZFRC.bit.DCBEVT2 = 1;
        EPwm2Regs.TZFRC.bit.CBC = 1;


        EDIS;


        // Active Low PWMs - Setup Deadband
        PWM_setDeadBandOutputMode(myPwm1,            PWM_DeadBandOutputMode_EPWMxA_Rising_EPWMxB_Falling);
        PWM_setDeadBandPolarity(myPwm1, PWM_DeadBandPolarity_EPWMxB_Inverted);

        PWM_setDeadBandInputMode(myPwm1, PWM_DeadBandInputMode_EPWMxA_Rising_and_Falling);
        PWM_setDeadBandRisingEdgeDelay(myPwm1, EPWM1_MIN_DB);
        PWM_setDeadBandFallingEdgeDelay(myPwm1, EPWM1_MIN_DB);
    }
    else
    {
        PWM_disableDeadBand(myPwm1);
    }

//================================================================================//

FAE有建議我在CCS可以勾選下列設定,但依然沒有改善 : (RealTime options)