使用ADSP-408F设置PWM，为什么在示波器只能看到PWM_SYNC信号？

使用ADSP-408F评估板，设置PWM，系统时钟为100MHz，PWM 的频率为10KHz，但是在示波器只能看到PWM_SYNC信号，而PPWM0_AH/AL,PWM0_BH/BL,PWM0_CH/CL,没有脉冲，下面是程序，请帮助查看一下，那里有问题呢？
void SetupPWM(void){
/*****************************************************************************
   Function: SetupPWM
   Parameters: None
   Returns: None
   
   Notes: Setup of 3 phase PWM timer
*****************************************************************************/  
   static ADI_PWM_RESULT result;
   uint32_t temp = 0;
         
   result = adi_pwm_Open(PWM_DEV,  PwmMemory, ADI_PWM_MEMORY_SIZE,  hPWM, PwmCallback, NULL); // Open driver
   temp = (uint32_t)(fsysclk / (2u * F_SW));            // Calculate switching period as number of sys clocks (up-down counter)   
   result = adi_pwm_SetReferencePeriod(hPWM, temp);  
   
   temp = (uint32_t)((fsysclk * DEAD_TIME) / 2u);       // Calculate dead time period as number of sys clocks (up-down counter)
   result = adi_pwm_SetDeadtime(hPWM, temp);
   
   temp = (uint32_t)(fsysclk * SYNC_PULSE_WIDTH);       // Calculate sync pulse width as number of sys clocks (up-down counter)   
   result = adi_pwm_SetSyncWidth(hPWM, temp);  
   result = adi_pwm_ExtSyncEnable(hPWM, false, false);          // Internal sync used
   result = adi_pwm_SetIntSyncTimerMode(hPWM, ADI_PWM_TIMER0);  // Use timer 0 to generate sync.
   
   result = adi_pwm_SetPulseMode(hPWM, ADI_PWM_CHANNEL_A, ADI_PWM_HIGH_SIDE, ADI_PWM_PULSE_SYMMETRICAL); // Use symmetrical PWM on all channels
   result = adi_pwm_SetPulseMode(hPWM, ADI_PWM_CHANNEL_A, ADI_PWM_LOW_SIDE,  ADI_PWM_PULSE_SYMMETRICAL);
   result = adi_pwm_SetPulseMode(hPWM, ADI_PWM_CHANNEL_B, ADI_PWM_HIGH_SIDE, ADI_PWM_PULSE_SYMMETRICAL);
   result = adi_pwm_SetPulseMode(hPWM, ADI_PWM_CHANNEL_B, ADI_PWM_LOW_SIDE,  ADI_PWM_PULSE_SYMMETRICAL);
   result = adi_pwm_SetPulseMode(hPWM, ADI_PWM_CHANNEL_C, ADI_PWM_HIGH_SIDE, ADI_PWM_PULSE_SYMMETRICAL);
   result = adi_pwm_SetPulseMode(hPWM, ADI_PWM_CHANNEL_C, ADI_PWM_LOW_SIDE,  ADI_PWM_PULSE_SYMMETRICAL);
   
   result = adi_pwm_SetTimerMode(hPWM, ADI_PWM_CHANNEL_A, false);   // Use Timer 0 as reference for all channels
   result = adi_pwm_SetTimerMode(hPWM, ADI_PWM_CHANNEL_B, false);
   result = adi_pwm_SetTimerMode(hPWM, ADI_PWM_CHANNEL_C, false);
   
   result = adi_pwm_SetLowSideMode(hPWM, ADI_PWM_CHANNEL_A, false); // LS is inverse of HS on all channels - no need to update LS dutys
   result = adi_pwm_SetLowSideMode(hPWM, ADI_PWM_CHANNEL_B, false);
   result = adi_pwm_SetLowSideMode(hPWM, ADI_PWM_CHANNEL_C, false);
   result = adi_pwm_SetOutputPolarity(hPWM, ADI_PWM_CHANNEL_A, ADI_PWM_HIGH_SIDE, false);   // Set all outputs to active low
   result = adi_pwm_SetOutputPolarity(hPWM, ADI_PWM_CHANNEL_A, ADI_PWM_LOW_SIDE,  false);
   result = adi_pwm_SetOutputPolarity(hPWM, ADI_PWM_CHANNEL_B, ADI_PWM_HIGH_SIDE, false);
   result = adi_pwm_SetOutputPolarity(hPWM, ADI_PWM_CHANNEL_B, ADI_PWM_LOW_SIDE,  false);
   result = adi_pwm_SetOutputPolarity(hPWM, ADI_PWM_CHANNEL_C, ADI_PWM_HIGH_SIDE, false);
   result = adi_pwm_SetOutputPolarity(hPWM, ADI_PWM_CHANNEL_C, ADI_PWM_LOW_SIDE,  false);
   
   result = adi_pwm_SetTripEnable(hPWM, ADI_PWM_CHANNEL_A, ADI_PWM_TRIP0_SRC, true);    // Enable Trip0 and trip on all channels
   result = adi_pwm_SetTripEnable(hPWM, ADI_PWM_CHANNEL_B, ADI_PWM_TRIP0_SRC, true);
   result = adi_pwm_SetTripEnable(hPWM, ADI_PWM_CHANNEL_C, ADI_PWM_TRIP0_SRC, true);
   result = adi_pwm_SetTripEnable(hPWM, ADI_PWM_CHANNEL_A, ADI_PWM_TRIP1_SRC, true);    // Enable Trip1 and trip on all channels
   result = adi_pwm_SetTripEnable(hPWM, ADI_PWM_CHANNEL_B, ADI_PWM_TRIP1_SRC, true);
   result = adi_pwm_SetTripEnable(hPWM, ADI_PWM_CHANNEL_C, ADI_PWM_TRIP1_SRC, true);
   
   result = adi_pwm_SetTripMode(hPWM, ADI_PWM_CHANNEL_A, ADI_PWM_TRIP0_SRC, false);     // Stop PWM and report fault at trip. Do not restart
   result = adi_pwm_SetTripMode(hPWM, ADI_PWM_CHANNEL_B, ADI_PWM_TRIP0_SRC, false);
   result = adi_pwm_SetTripMode(hPWM, ADI_PWM_CHANNEL_C, ADI_PWM_TRIP0_SRC, false);  
   result = adi_pwm_SetTripMode(hPWM, ADI_PWM_CHANNEL_A, ADI_PWM_TRIP1_SRC, false);
   result = adi_pwm_SetTripMode(hPWM, ADI_PWM_CHANNEL_B, ADI_PWM_TRIP1_SRC, false);
   result = adi_pwm_SetTripMode(hPWM, ADI_PWM_CHANNEL_C, ADI_PWM_TRIP1_SRC, false);
   
   result = adi_pwm_InterruptEnable(hPWM, ADI_PWM_INTERRUPT_TIMER0, true);              // Enable sync irq
   result = adi_pwm_InterruptEnable(hPWM, ADI_PWM_INTERRUPT_TRIP0, true);               // Enable trip0 irq  
   result = adi_pwm_InterruptEnable(hPWM, ADI_PWM_INTERRUPT_TRIP1, true);               // Enable trip1 irq
   
   result = adi_pwm_OutputEnable(hPWM, ADI_PWM_CHANNEL_A, ADI_PWM_HIGH_SIDE, true);    // Enable output pins
   result = adi_pwm_OutputEnable(hPWM, ADI_PWM_CHANNEL_A, ADI_PWM_LOW_SIDE,  true);
   result = adi_pwm_OutputEnable(hPWM, ADI_PWM_CHANNEL_B, ADI_PWM_HIGH_SIDE, true);
   result = adi_pwm_OutputEnable(hPWM, ADI_PWM_CHANNEL_B, ADI_PWM_LOW_SIDE,  true);
   result = adi_pwm_OutputEnable(hPWM, ADI_PWM_CHANNEL_C, ADI_PWM_HIGH_SIDE, true);
   result = adi_pwm_OutputEnable(hPWM, ADI_PWM_CHANNEL_C, ADI_PWM_LOW_SIDE,  true);
   @@
   result = adi_pwm_Enable(hPWM, true);                                                 // Enable PWM
}
下面是v021有关PWM的配置，结果什么都没有看到，不知为什么？
void SetupPWM(void){
/*****************************************************************************
   Function: SetupPWM
   
   Parameters: None
   
   Returns: None
   
   Notes: Setup of 3 phase PWM timer
   
*****************************************************************************/
   uint32_t temp = 0;
   
   temp = (uint32_t)(fsysclk / (2u * F_SW));            // Calculate switching period as number of sys clocks (up-down counter)   
   *pREG_PWM0_TM0 = (uint16_t)temp;
   
   temp = (uint32_t)((fsysclk * DEAD_TIME) / 2u);       // Calculate dead time period as number of sys clocks (up-down counter)
   *pREG_PWM0_DT = (uint16_t)temp;
   
   temp = (uint32_t)(fsysclk * SYNC_PULSE_WIDTH);       // Calculate sync pulse width as number of sys clocks (up-down counter)   
   *pREG_PWM0_SYNC_WID = (uint16_t)temp;
   
   *pREG_PWM0_CTL |= (ENUM_PWM_CTL_INTSYNC_0 | ENUM_PWM_CTL_INTSYNC | ENUM_PWM_CTL_EMURUN_DIS);
   
   *pREG_PWM0_ACTL |= (ENUM_PWM_SYM_LO | ENUM_PWM_SYM_HI | ENUM_PWM_XOVR_DIS);
   *pREG_PWM0_BCTL |= (ENUM_PWM_SYM_LO | ENUM_PWM_SYM_HI | ENUM_PWM_XOVR_DIS);
   *pREG_PWM0_CCTL |= (ENUM_PWM_SYM_LO | ENUM_PWM_SYM_HI | ENUM_PWM_XOVR_DIS);
   
   *pREG_PWM0_CHANCFG |= (ENUM_PWM_CHANCFG_REFTMRA_0 | ENUM_PWM_CHANCFG_LOA_INVHI | ENUM_PWM_CHANCFG_AH_ACTLO | ENUM_PWM_CHANCFG_CHOPAH_DIS | ENUM_PWM_CHANCFG_HPAH_DIS |
                          ENUM_PWM_CHANCFG_AL_ACTLO | ENUM_PWM_CHANCFG_CHOPAL_DIS);
   
   *pREG_PWM0_CHANCFG |= (ENUM_PWM_CHANCFG_REFTMRB_0 | ENUM_PWM_CHANCFG_LOB_INV | ENUM_PWM_CHANCFG_BH_ACTLO | ENUM_PWM_CHANCFG_CHOPBH_DIS | ENUM_PWM_CHANCFG_HPBH_DIS |
                          ENUM_PWM_CHANCFG_BL_ACTLO | ENUM_PWM_CHANCFG_CHOPBL_DIS);
   
   *pREG_PWM0_CHANCFG |= (ENUM_PWM_CHANCFG_REFTMRC_0 | ENUM_PWM_CHANCFG_LOC_INVHI | ENUM_PWM_CHANCFG_CH_ACTLO | ENUM_PWM_CHANCFG_CHOPCH_DIS | ENUM_PWM_CHANCFG_HPCH_DIS |
                          ENUM_PWM_CHANCFG_CL_ACTLO | ENUM_PWM_CHANCFG_CHOPCL_DIS);
   
   *pREG_PWM0_TRIPCFG |= (ENUM_PWM_TRIPCFG_TRIP0A_EN |ENUM_PWM_TRIPCFG_TRIP1A_EN | ENUM_PWM_TRIPCFG_TRIP0A_FLT | ENUM_PWM_TRIPCFG_TRIP1A_FLT) |
                         (ENUM_PWM_TRIPCFG_TRIP0B_EN |ENUM_PWM_TRIPCFG_TRIP1B_EN | ENUM_PWM_TRIPCFG_TRIP0B_FLT | ENUM_PWM_TRIPCFG_TRIP1B_FLT) |
                         (ENUM_PWM_TRIPCFG_TRIP0C_EN |ENUM_PWM_TRIPCFG_TRIP1C_EN | ENUM_PWM_TRIPCFG_TRIP0C_FLT | ENUM_PWM_TRIPCFG_TRIP1C_FLT);
   
   *pREG_PWM0_IMSK |= (ENUM_PWM_IMSK_TRIP0_UMSK | ENUM_PWM_IMSK_TRIP1_UMSK | ENUM_PWM_IMSK_PER0_UMSK);
   
   adi_int_InstallHandler((IRQn_Type)INTR_PWM0_TRIP, PWM0_TRIP_ISR, 0, true);
   NVIC_SetPriority((IRQn_Type)INTR_PWM0_TRIP, 1);  
   NVIC_EnableIRQ((IRQn_Type)INTR_TIMER0_TMR1);
   
   adi_int_InstallHandler((IRQn_Type)INTR_PWM0_SYNC, PWM0_SYNC_ISR, 0, true);
   NVIC_SetPriority((IRQn_Type)INTR_PWM0_SYNC, 0);  
   NVIC_EnableIRQ((IRQn_Type)INTR_PWM0_SYNC);
   
   *pREG_PWM0_ACTL |= (ENUM_PWM_HI_EN | ENUM_PWM_LO_EN);
   *pREG_PWM0_BCTL |= (ENUM_PWM_HI_EN | ENUM_PWM_LO_EN);
   *pREG_PWM0_CCTL |= (ENUM_PWM_HI_EN | ENUM_PWM_LO_EN);
   
   *pREG_PWM0_CTL |= ENUM_PWM_CTL_PWM_EN;
}