HC32F460的Timer63 PWMB始终只输出40Hz的PWM

void BuzzerInit(void)

{

    stc_timer6_basecnt_cfg_t         stcTIM6BaseCntCfg;

    stc_timer6_port_output_cfg_t     stcTIM6PWMxCfg;

    stc_port_init_t                  stcPortInit;

        stc_clk_freq_t stcClkTmp;

    stc_timer6_gcmp_buf_cfg_t        stcGCMPBufCfg;

    

        MEM_ZERO_STRUCT(stcTIM6BaseCntCfg);

    MEM_ZERO_STRUCT(stcTIM6PWMxCfg);

    MEM_ZERO_STRUCT(stcPortInit);

    MEM_ZERO_STRUCT(stcClkTmp);

    MEM_ZERO_STRUCT(stcGCMPBufCfg);

    

    CLK_GetClockFreq( &stcClkTmp );

        

        PWC_Fcg2PeriphClockCmd(PWC_FCG2_PERIPH_TIM63, Enable);



    PORT_SetFunc(PortB, Pin01, Func_Tim6, Disable);    //Timer63 PWMA

        

        stcTIM6BaseCntCfg.enCntMode   = Timer6CntSawtoothMode;              //Sawtooth wave mode

    stcTIM6BaseCntCfg.enCntDir    = Timer6CntDirUp;                     //Counter counting up

    stcTIM6BaseCntCfg.enCntClkDiv = Timer6PclkDiv64;                     //Count clock: pclk0

    Timer6_Init(M4_TMR63, &stcTIM6BaseCntCfg);                          //timer6 PWM frequency, count mode and clk config

        

        uint16_t u16Period = SystemCoreClock / BUZ_PWM_PSC / BUZZER_FREQ_HZ;

    Timer6_SetPeriod(M4_TMR63, Timer6PeriodB, u16Period);               //period set



    uint16_t u16Compare = u16Period / 2;

    Timer6_SetGeneralCmpValue(M4_TMR63, Timer6GenCompareB, u16Compare);    //Set General Compare RegisterA Value



    /*PWMB output buf config*/

    stcTIM6PWMxCfg.enPortMode = Timer6ModeCompareOutput;    //Compare output function

    stcTIM6PWMxCfg.bOutEn     = true;                       //Output enable

    stcTIM6PWMxCfg.enPerc     = Timer6PWMxCompareLow;       //PWMB port output Low level when CNTER value match PERAR

    stcTIM6PWMxCfg.enCmpc     = Timer6PWMxCompareHigh;      //PWMB port output High level when CNTER value match with GCMAR

    stcTIM6PWMxCfg.enStaStp   = Timer6PWMxStateSelSS;       //PWMB output status is decide by STACA STPCA when CNTER start and stop

    stcTIM6PWMxCfg.enStaOut   = Timer6PWMxPortOutHigh;       //PWMB port output set low level when CNTER start

    stcTIM6PWMxCfg.enStpOut   = Timer6PWMxPortOutLow;       //PWMB port output set low level when CNTER stop

    stcTIM6PWMxCfg.enDisVal   = Timer6PWMxDisValLow;

    Timer6_PortOutputConfig(M4_TMR63, Timer6PWMB, &stcTIM6PWMxCfg);

          M4_TMR63->CNTER_f.CNT = 0;

          M4_TMR63->GCONR_f.START = 1;        

        BuzzerOff();

}