/********************动态创建计数信号量**********************************************/
SemaphoreHandle_t xSemaphoreCreateCounting(UBaseType_t uxMaxCount,
BaseType_t uxInitialCount)
/********************静态创建计数信号量**********************************************/
SemaphoreHandle_t xSemaphoreCreateCountingStatic(UBaseType_t uxMaxCount,//信号量最大计数值
BaseType_t uxInitialCount,//计数信号量初始值
taticSemaphore_t * pxSemaphoreBuffer)//保存信号量结构体
/***********************************************************************************/
返回值：创建成功返回计数信号量句柄；失败返回NULL

#if( configSUPPORT_DYNAMIC_ALLOCATION == 1 )
#define xSemaphoreCreateCounting( uxMaxCount, uxInitialCount ) 	
xQueueCreateCountingSemaphore( (uxMaxCount),(uxInitialCount) )	
#endif

QueueHandle_t xQueueCreateCountingSemaphore(const UBaseType_t uxMaxCount,const UBaseType_t uxInitialCount){
	QueueHandle_t xHandle;
	/* 调用消息队列创建函数，创建队列长度为uxMaxCount，队列项长度为0，类型为计数信号量的队列 */
	xHandle = xQueueGenericCreate(uxMaxCount,queueSEMAPHORE_QUEUE_ITEM_LENGTH,queueQUEUE_TYPE_COUNTING_SEMAPHORE);
	if( xHandle != NULL ){
		/* 将计数信号量的初始值来设置uxMessagesWaiting，代表可用的资源数量 */
		( ( Queue_t * ) xHandle )->uxMessagesWaiting = uxInitialCount;
		traceCREATE_COUNTING_SEMAPHORE();
	}
	else{
		traceCREATE_COUNTING_SEMAPHORE_FAILED();
	}
	return xHandle;
}

void KeyscanTask(void const * argument){
  int8_t key;
  int8_t sem_value;
  BaseType_t err;
  for(;;){
	key = KEY_Scan(0);
	if(CountingSemHandle != NULL){
	  switch(key){
		case KEY_UP_PRES:
		  err = xSemaphoreTake(CountingSemHandle,portMAX_DELAY);
		  if(err == pdFALSE)
			printf("Semaphore Take failed!\r\n");
		  else{
			sem_value = uxSemaphoreGetCount(CountingSemHandle);
			printf("Semaphore Take successed, Semvalue = %d\r\n",sem_value);
			HAL_GPIO_WritePin(GPIOC,GPIO_PIN_0,GPIO_PIN_RESET);
		  }
		  break;
		case KEY_DOWN_PRES:
		  err = xSemaphoreGive(CountingSemHandle);
		  if(err == pdFALSE)
			printf("Semaphore Give failed!\r\n");
		  else{
			sem_value = uxSemaphoreGetCount(CountingSemHandle);
			printf("Semaphore Give successed, Semvalue = %d\r\n",sem_value);
			HAL_GPIO_WritePin(GPIOC,GPIO_PIN_0,GPIO_PIN_SET);
		  }
		  break;
	  }
	}
    osDelay(10);
  }
}