[参考译文] TMS320F28388D：如何立即禁用 PWM？

//
// Trip Zone module related APIs
//
//*****************************************************************************
//
//! Enables Trip Zone signal.
//!
//! \param base is the base address of the EPWM module.
//! \param tzSignal is the Trip Zone signal.
//!
//! This function enables the Trip Zone signals specified by tzSignal as a
//! source for the Trip Zone module.
//! Valid values for tzSignal are:
//!   - EPWM_TZ_SIGNAL_CBC1       - TZ1 Cycle By Cycle
//!   - EPWM_TZ_SIGNAL_CBC2       - TZ2 Cycle By Cycle
//!   - EPWM_TZ_SIGNAL_CBC3       - TZ3 Cycle By Cycle
//!   - EPWM_TZ_SIGNAL_CBC4       - TZ4 Cycle By Cycle
//!   - EPWM_TZ_SIGNAL_CBC5       - TZ5 Cycle By Cycle
//!   - EPWM_TZ_SIGNAL_CBC6       - TZ6 Cycle By Cycle
//!   - EPWM_TZ_SIGNAL_DCAEVT2    - DCAEVT2 Cycle By Cycle
//!   - EPWM_TZ_SIGNAL_DCBEVT2    - DCBEVT2 Cycle By Cycle
//!   - EPWM_TZ_SIGNAL_OSHT1      - One-shot TZ1
//!   - EPWM_TZ_SIGNAL_OSHT2      - One-shot TZ2
//!   - EPWM_TZ_SIGNAL_OSHT3      - One-shot TZ3
//!   - EPWM_TZ_SIGNAL_OSHT4      - One-shot TZ4
//!   - EPWM_TZ_SIGNAL_OSHT5      - One-shot TZ5
//!   - EPWM_TZ_SIGNAL_OSHT6      - One-shot TZ6
//!   - EPWM_TZ_SIGNAL_DCAEVT1    - One-shot DCAEVT1
//!   - EPWM_TZ_SIGNAL_DCBEVT1    - One-shot DCBEVT1
//!
//! \b note:  A logical OR of the valid values can be passed as the tzSignal
//!           parameter.
//!
//! \return None.
//
//*****************************************************************************
static inline void
EPWM_enableTripZoneSignals(uint32_t base, uint16_t tzSignal)
{
    //
    // Check the arguments
    //
    ASSERT(EPWM_isBaseValid(base));

    //
    // Set the trip zone bits
    //
    EALLOW;
    HWREGH(base + EPWM_O_TZSEL) |= tzSignal;
    EDIS;
}

//*****************************************************************************
//
//! Disables Trip Zone signal.
//!
//! \param base is the base address of the EPWM module.
//! \param tzSignal is the Trip Zone signal.
//!
//! This function disables the Trip Zone signal specified by tzSignal as a
//! source for the Trip Zone module.
//! Valid values for tzSignal are:
//!   - EPWM_TZ_SIGNAL_CBC1       - TZ1 Cycle By Cycle
//!   - EPWM_TZ_SIGNAL_CBC2       - TZ2 Cycle By Cycle
//!   - EPWM_TZ_SIGNAL_CBC3       - TZ3 Cycle By Cycle
//!   - EPWM_TZ_SIGNAL_CBC4       - TZ4 Cycle By Cycle
//!   - EPWM_TZ_SIGNAL_CBC5       - TZ5 Cycle By Cycle
//!   - EPWM_TZ_SIGNAL_CBC6       - TZ6 Cycle By Cycle
//!   - EPWM_TZ_SIGNAL_DCAEVT2    - DCAEVT2 Cycle By Cycle
//!   - EPWM_TZ_SIGNAL_DCBEVT2    - DCBEVT2 Cycle By Cycle
//!   - EPWM_TZ_SIGNAL_OSHT1      - One-shot TZ1
//!   - EPWM_TZ_SIGNAL_OSHT2      - One-shot TZ2
//!   - EPWM_TZ_SIGNAL_OSHT3      - One-shot TZ3
//!   - EPWM_TZ_SIGNAL_OSHT4      - One-shot TZ4
//!   - EPWM_TZ_SIGNAL_OSHT5      - One-shot TZ5
//!   - EPWM_TZ_SIGNAL_OSHT6      - One-shot TZ6
//!   - EPWM_TZ_SIGNAL_DCAEVT1    - One-shot DCAEVT1
//!   - EPWM_TZ_SIGNAL_DCBEVT1    - One-shot DCBEVT1
//!
//! \b note:  A logical OR of the valid values can be passed as the tzSignal
//!           parameter.
//!
//! \return None.
//
//*****************************************************************************
static inline void
EPWM_disableTripZoneSignals(uint32_t base, uint16_t tzSignal)
{
    //
    // Check the arguments
    //
    ASSERT(EPWM_isBaseValid(base));

    //
    // Clear the trip zone bits
    //
    EALLOW;
    HWREGH(base + EPWM_O_TZSEL) &= ~tzSignal;
    EDIS;
}

//*****************************************************************************