TMS320F28335: how to disable epwm module after a certain time

Hi Cagdas,

In order to use the tripzone module have you referenced our C2000Ware examples? That would be a good place to start.

C:\ti\c2000\C2000Ware_4_03_00_00\device_support\f2833x\examples\epwm_trip_zone 

In order to see a basic trip zone configuration is using the One shot, here is the initialization of that code. The main lines to look at is the TZCTL.bit.TZA, this will configure what action to occur when a one shot trip event occurs. In the example located in the above location, it will have GPIO12/13 to trigger a one shot condition.

InitEPwm1Example()
{
    //
    // Enable TZ1 and TZ2 as one shot trip sources
    //
    EALLOW;
    EPwm1Regs.TZSEL.bit.OSHT1 = 1;
    EPwm1Regs.TZSEL.bit.OSHT2 = 1;

    EPwm1Regs.TZCTL.bit.TZA = TZ_FORCE_HI;
    EPwm1Regs.TZCTL.bit.TZB = TZ_FORCE_LO;

    //
    // Enable TZ interrupt
    //
    EPwm1Regs.TZEINT.bit.OST = 1;
    EDIS;

    EPwm1Regs.TBPRD = 6000;                         // Set timer period
    EPwm1Regs.TBPHS.half.TBPHS = 0x0000;            // Phase is 0
    EPwm1Regs.TBCTR = 0x0000;                       // Clear counter

    //
    // Setup TBCLK
    //
    EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN; // Count up
    EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE;        // Disable phase loading
    EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV4;       // Clock ratio to SYSCLKOUT
    EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV4;

    EPwm1Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;    // Load registers every ZERO
    EPwm1Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
    EPwm1Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
    EPwm1Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;

    //
    // Setup compare
    //
    EPwm1Regs.CMPA.half.CMPA = 3000;

    //
    // Set actions
    //
    EPwm1Regs.AQCTLA.bit.CAU = AQ_SET;            // Set PWM1A on Zero
    EPwm1Regs.AQCTLA.bit.CAD = AQ_CLEAR;

    EPwm1Regs.AQCTLB.bit.CAU = AQ_CLEAR;          // Set PWM1A on Zero
    EPwm1Regs.AQCTLB.bit.CAD = AQ_SET;
}

Best,

Ryan Ma