F28069 TZ故障问题

你们好，

我现在用F28069的TZ故障。当正常时，TZ信号为高电平，有PWM输出；当TZ信号为低电平时PWM一直关闭。我想做成发生TZ触发后PWM关闭10S后，如果TZ信号正常了，PWM可以有输出。也即怎么让TZ出发后，然后TZ故障消除了，停上10S再启动。

EALLOW;
// CPU Halt Trip
EPwm1Regs.TZSEL.bit.CBC6=0x1;
EPwm2Regs.TZSEL.bit.CBC6=0x1;
EPwm3Regs.TZSEL.bit.CBC6=0x1;


EPwm1Regs.TZSEL.bit.OSHT1 = 1; //enable TZ1 for OSHT
EPwm2Regs.TZSEL.bit.OSHT1 = 1; //enable TZ1 for OSHT
EPwm3Regs.TZSEL.bit.OSHT1 = 1; //enable TZ1 for OSHT

// What do we want the OST/CBC events to do?
// TZA events can force EPWMxA
// TZB events can force EPWMxB

EPwm1Regs.TZCTL.bit.TZA = TZ_FORCE_LO; // EPWMxA will go low
EPwm1Regs.TZCTL.bit.TZB = TZ_FORCE_LO; // EPWMxB will go low

EPwm2Regs.TZCTL.bit.TZA = TZ_FORCE_LO; // EPWMxA will go low
EPwm2Regs.TZCTL.bit.TZB = TZ_FORCE_LO; // EPWMxB will go low

EPwm3Regs.TZCTL.bit.TZA = TZ_FORCE_LO; // EPWMxA will go low
EPwm3Regs.TZCTL.bit.TZB = TZ_FORCE_LO; // EPWMxB will go low

EDIS;

// Clear any spurious OV trip
EPwm1Regs.TZCLR.bit.OST = 1;
EPwm2Regs.TZCLR.bit.OST = 1;
EPwm3Regs.TZCLR.bit.OST = 1;

if(EPwm1Regs.TZFLG.bit.OST==0x1) // TripZ for PWMs is low (fault trip)
{ TripFlagDMC=1;
GpioDataRegs.GPBTOGGLE.bit.GPIO42 = 1;
}