TMS320F280049C: 关于tz模块软件触发异常

使用软件触发epwm的TZ，以用于保护，现在程序可以强制pwm输出低电平，但恢复pwm输出异常，以下是sysconfig配置和部分程序：

#include "driverlib.h"
#include "device.h"
#include "board.h"

__interrupt void epwm1TZISR(void);

uint8_t Mode = 1U;
uint8_t PWMEN_Flag = 0U;
uint32_t cnt = 0U;

void EPwm_Enable(void)//PWM使能
{

    EALLOW;

    EPWM_clearOneShotTripZoneFlag(myEPWM1_BASE, EPWM_TZ_OST_FLAG_OST1);
//    SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1;
    EDIS;

}

void EPwm_Disable(void)
{
    EALLOW;
    EPWM_forceTripZoneEvent(myEPWM1_BASE, EPWM_TZ_FORCE_EVENT_OST);
//    SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0;
    EDIS;
}

void test_fun(void)
{
    if (Mode == 0)
    {
        if (PWMEN_Flag == 1)
        {
            PWMEN_Flag = 0;
            EPwm_Disable();
        }
    }
    if (Mode == 1)
    {
        if (PWMEN_Flag == 0)
        {
            PWMEN_Flag = 1;
            EPwm_Enable();
        }
    }
}

int main(void)
{
    Device_init();//初始化时钟和外设
    Device_initGPIO();

    Interrupt_initModule();//初始化PIE，清空PIE注册表，禁止CPU中断
    Interrupt_initVectorTable();

    SysCtl_disablePeripheral(SYSCTL_PERIPH_CLK_TBCLKSYNC);

    Board_init();

    SysCtl_enablePeripheral(SYSCTL_PERIPH_CLK_TBCLKSYNC);

    EINT;
    ERTM;

    while(1)
    {
        test_fun();
        NOP;
    }
}

__interrupt void epwm1TZISR(void)
{
    cnt++;
    Interrupt_clearACKGroup(INT_myEPWM1_TZ_INTERRUPT_ACK_GROUP);
}

程序参照另外两篇e2e帖子写的，AI回复为 EPWM_clearOneShotTripZoneFlag(myEPWM1_BASE, EPWM_TZ_OST_FLAG_OST1);未正常工作