移植FreeRTOS后运行，卡在uxDeletedTasksWaitingCleanUp

systick由freertos初始化，void SVC_Handler(void)、void PendSV_Handler(void)也已注释，但运行后会卡在while( uxDeletedTasksWaitingCleanUp > ( UBaseType_t ) 0U )。

除了网上说的，还可能是systick中断函数没改：

/**
  * @brief  This function handles SysTick Handler.
  * @param  None
  * @retval None
  */
extern void xPortSysTickHandler(void);
//systick中断服务函数
void SysTick_Handler(void)
{   
    #if (INCLUDE_xTaskGetSchedulerState  == 1 )
      if (xTaskGetSchedulerState() != taskSCHEDULER_NOT_STARTED)
      {
    #endif  /* INCLUDE_xTaskGetSchedulerState */  
        xPortSysTickHandler();
    #if (INCLUDE_xTaskGetSchedulerState  == 1 )
      }
    #endif  /* INCLUDE_xTaskGetSchedulerState */
}