HRTIM变频控制输出的第一个周期频率异常的原因？

在使用STM32G474CBT6的HRtiM_Mater、HRTIM_TIMER_B和HRTIM_TIMER_D输出同步互补的四路输出时，关闭4路输出和三个定时器的计数后，再次开启时第一个周期的频率异常。
初始化HRTIM第一次开启时，变频控制第一个周期没有问题。
MX_HRTIM1_Init();//设置频率和变频控制第一个周期一致HAL_HRTIM_WaveformOutputStart(&hhrtim1, HRTIM_OUTPUT_TB2 + HRTIM_OUTPUT_TB1 + HRTIM_OUTPUT_TD1 + HRTIM_OUTPUT_TD2);HAL_HRTIM_WaveformCounterStart(&hhrtim1, HRTIM_TIMERID_MASTER + HRTIM_TIMERID_TIMER_B + HRTIM_TIMERID_TIMER_D);for(){//变频控制 增加 _period值__HAL_HRTIM_SETCOMPARE(&hhrtim1, HRTIM_TIMERINDEX_TIMER_B, HRTIM_COMPAREUNIT_1, _period>>1);__HAL_HRTIM_SETCOMPARE(&hhrtim1, HRTIM_TIMERINDEX_TIMER_D, HRTIM_COMPAREUNIT_1, _period>>1);__HAL_HRTIM_SETPERIOD(&hhrtim1, HRTIM_TIMERINDEX_MASTER, _period);__HAL_HRTIM_SETPERIOD(&hhrtim1, HRTIM_TIMERINDEX_TIMER_B, _period);__HAL_HRTIM_SETPERIOD(&hhrtim1, HRTIM_TIMERINDEX_TIMER_D, _period);if(ok)//变频完成后跳出{return}}当关闭输出后再次开启时出现异常
HAL_HRTIM_WaveformOutputStop(&hhrtim1, HRTIM_OUTPUT_TB2 + HRTIM_OUTPUT_TB1 + HRTIM_OUTPUT_TD1 + HRTIM_OUTPUT_TD2);//关闭输出HAL_HRTIM_WaveformCounterStop(&hhrtim1, HRTIM_TIMERID_MASTER + HRTIM_TIMERID_TIMER_B + HRTIM_TIMERID_TIMER_D);//关闭计数  __HAL_HRTIM_SETCOMPARE(&hhrtim1, HRTIM_TIMERINDEX_TIMER_B, HRTIM_COMPAREUNIT_1, first_period>>1);__HAL_HRTIM_SETCOMPARE(&hhrtim1, HRTIM_TIMERINDEX_TIMER_D, HRTIM_COMPAREUNIT_1, first_period>>1);__HAL_HRTIM_SETPERIOD(&hhrtim1, HRTIM_TIMERINDEX_MASTER, first_period);__HAL_HRTIM_SETPERIOD(&hhrtim1, HRTIM_TIMERINDEX_TIMER_B, first_period);__HAL_HRTIM_SETPERIOD(&hhrtim1, HRTIM_TIMERINDEX_TIMER_D, first_period);//初始化频率__HAL_HRTIM_SETCOUNTER(&hhrtim1, HRTIM_TIMERINDEX_MASTER, 0);__HAL_HRTIM_SETCOUNTER(&hhrtim1, HRTIM_TIMERINDEX_TIMER_B, 0);__HAL_HRTIM_SETCOUNTER(&hhrtim1, HRTIM_TIMERINDEX_TIMER_D, 0);//清0计数hhrtim1.Instance->sCommonRegs.CR2 |= HRTIM_CR2_MSWU;hhrtim1.Instance->sCommonRegs.CR2 |= HRTIM_CR2_TBSWU;hhrtim1.Instance->sCommonRegs.CR2 |= HRTIM_CR2_TDSWU;//猜测可能是预装载引起后增加额代码，触发更新事件//////////////完成关闭HAL_HRTIM_WaveformOutputStart(&hhrtim1, HRTIM_OUTPUT_TB2 + HRTIM_OUTPUT_TB1 + HRTIM_OUTPUT_TD1 + HRTIM_OUTPUT_TD2);HAL_HRTIM_WaveformCounterStart(&hhrtim1, HRTIM_TIMERID_MASTER + HRTIM_TIMERID_TIMER_B + HRTIM_TIMERID_TIMER_D);for(){//变频控制 增加 _period值__HAL_HRTIM_SETCOMPARE(&hhrtim1, HRTIM_TIMERINDEX_TIMER_B, HRTIM_COMPAREUNIT_1, _period>>1);__HAL_HRTIM_SETCOMPARE(&hhrtim1, HRTIM_TIMERINDEX_TIMER_D, HRTIM_COMPAREUNIT_1, _period>>1);__HAL_HRTIM_SETPERIOD(&hhrtim1, HRTIM_TIMERINDEX_MASTER, _period);__HAL_HRTIM_SETPERIOD(&hhrtim1, HRTIM_TIMERINDEX_TIMER_B, _period);__HAL_HRTIM_SETPERIOD(&hhrtim1, HRTIM_TIMERINDEX_TIMER_D, _period);if(ok)//变频完成后跳出{return}}////////////////再次开启频率是从高频往下降，再次开启时第一个周期的频率低了很多（周期变长）。
请问有什么办法解决嘛？