msp432p401r使用dwt延时卡死

是的，但该功能一般用的不是很多。在E2E上有客户分享了他的代码，您可以看一下

//use DWT for timing
//return a flag: 1-> time is up, 0-> time not exhausted yet
char delay64DWT(uint64_t ticks64) {
    static uint64_t ticks64_prev = 0;               //previous coreticks, 64-bit
    static uint64_t ticks64_now = 0;                //64-bit ticks
    static uint32_t ticks_prev=0;                   //previous coreticks, 32-bit
    uint32_t ticks_now;                             //32-bit ticks

    //time stamp current ticks - 32-bit
    ticks_now = DWT->CYCCNT;                     //coreticks();              //read off DWT cycle counter (32-bit)
    ticks64_now += (ticks_now > ticks_prev)?(ticks_now - ticks_prev):((0x1ull << 32) - (ticks_prev - ticks_now));      //for 32-bit roll-over
    //alternative 1: this will work if 16-bit timer2a is used as time base
    //ticks_now = TMRx->TAR;                     //16-bit timer2a as time base
    //ticks64_now += (ticks_now > ticks_prev)?(ticks_now - ticks_prev):((0x1ull << 16) - (ticks_prev - ticks_now));        //for 32-bit roll-over
    //alternative 2: use systick (24-bit
    //ticks_now = SysTick->VAL;                      //24-bit systick as time base
    //ticks64_now += (ticks_now > ticks_prev)?(ticks_now - ticks_prev):((0x1ull << 24) - (ticks_prev - ticks_now));        //for 32-bit roll-over

    //time stamp current ticks - 64-bit
    ticks_prev = ticks_now;                         //update ticks_prev
    if ((ticks64_now - ticks64_prev) < ticks64) return 0;
    else {ticks64_prev = ticks64_now; return 1;}        //time is up
}