[嵌入式]STM32CUBEMX+FreeRTOS 信号量的使用，记录一个问题

默认配置创建的FreeRTOS 工程，手动在任务中创建信号量，没有配置configUSE_COUNTING_SEMAPHORES

?所以创建的都是二值量

osSemaphoreDef(Log_rx_Sem);
log_rx_SemHandle = osSemaphoreCreate(osSemaphore(Log_rx_Sem), 1); 

使用中发现，信号量有初值，创建完即可收到信号量。

在线调试发现创建过程中，创建函数判断semaphore_def->controlblock == NULL，故而调用的函数为老版本函数vSemaphoreCreateBinary(sema);已知老版本函数是有初值的，新版本函数xSemaphoreCreateBinary()没有初值，无奈只能直接使用xSemaphoreCreateBinary()来创建。

osSemaphoreId osSemaphoreCreate (const osSemaphoreDef_t *semaphore_def, int32_t count)
{ 
#if (configSUPPORT_STATIC_ALLOCATION == 1 ) && ( configSUPPORT_DYNAMIC_ALLOCATION == 1 )

  osSemaphoreId sema;
  
  if (semaphore_def->controlblock != NULL){
    if (count == 1) {
      return xSemaphoreCreateBinaryStatic( semaphore_def->controlblock );
    }
    else {
#if (configUSE_COUNTING_SEMAPHORES == 1 )
      return xSemaphoreCreateCountingStatic( count, count, semaphore_def->controlblock );
#else
      return NULL;
#endif
    }
  }
  else {
    if (count == 1) {
      vSemaphoreCreateBinary(sema);
      return sema;
    }
    else {
#if (configUSE_COUNTING_SEMAPHORES == 1 )	
      return xSemaphoreCreateCounting(count, count);
#else
      return NULL;
#endif    
    }
  }
#elif ( configSUPPORT_STATIC_ALLOCATION == 1 ) // configSUPPORT_DYNAMIC_ALLOCATION == 0
  if(count == 1) {
    return xSemaphoreCreateBinaryStatic( semaphore_def->controlblock );
  }
  else
  {
#if (configUSE_COUNTING_SEMAPHORES == 1 )
      return xSemaphoreCreateCountingStatic( count, count, semaphore_def->controlblock );
#else
      return NULL;
#endif    
  }
#else  // configSUPPORT_STATIC_ALLOCATION == 0  && configSUPPORT_DYNAMIC_ALLOCATION == 1
  osSemaphoreId sema;
 
  if (count == 1) {
    vSemaphoreCreateBinary(sema);
    return sema;
  }
  else {
#if (configUSE_COUNTING_SEMAPHORES == 1 )	
    return xSemaphoreCreateCounting(count, count);
#else
    return NULL;
#endif
  }
#endif
}