UCOSIII等待多个内核对象

Bertha 。 2022-06-02 03:29 169阅读 0赞

**内核对象**  
内核对象包括信号量、互斥信号量、消息队列和事件标志组  
UCOSIII中允许任务同时等待多个信号量和多个消息队列

**主结构体**

typedef struct os_pend_data OS_PEND_DATA;
    struct  os_pend_data {
        OS_PEND_DATA        *PrevPtr;
        OS_PEND_DATA        *NextPtr;
        OS_TCB              *TCBPtr;
        OS_PEND_OBJ         *PendObjPtr;
        OS_PEND_OBJ         *RdyObjPtr;
        void                *RdyMsgPtr;
        OS_MSG_SIZE          RdyMsgSize;
        CPU_TS               RdyTS;
    };

**API函数**

OS_OBJ_QTY OSPendMulti (OS_PEND_DATA *p_pend_data_tbl,
                            OS_OBJ_QTY tbl_size,
                            OS_TICK timeout,
                            OS_OPT opt,
                            OS_ERR *p_err);

**应用举例**

#define CORE_OBJ_NUM 3 //内核对象个数，一共3个：2个信号量和一个消息队列 
    OS_SEM  Test_Sem1;          //信号量1 
    OS_SEM  Test_Sem2;          //信号量2
    OS_Q    Test_Q;             //消息队列 
    
    void task1(void *p_arg)
    {
        while(1)
        {
            OSSemPost(&Test_Sem1,OS_OPT_POST_1,&err);//发送信号量1
            printf("task1 OSSemPost Test_Sem1 here\r\n");
    
            OSSemPost(&Test_Sem2,OS_OPT_POST_1,&err);//发送信号量2
            printf("task1 OSSemPost Test_Sem2 here\r\n");
    
            msg_num++;
            sprintf((char*)pbuf,"ALIENTEK %d",msg_num);
            //发送消息
            OSQPost((OS_Q*      )&Test_Q,       
                    (void*      )pbuf,
                    (OS_MSG_SIZE)10,
                    (OS_OPT     )OS_OPT_POST_FIFO,
                    (OS_ERR*    )&err);
            printf("task1 OSSemPost Test_Q here\r\n");
    
            OSTimeDlyHMSM(0,0,1,0,OS_OPT_TIME_PERIODIC,&err);
        }
    }
    
    void task2(void *p_arg)
    {
        OS_OBJ_QTY index;
        OS_PEND_DATA pend_multi_tbl[CORE_OBJ_NUM];
    
        pend_multi_tbl[0].PendObjPtr=(OS_PEND_OBJ*)&Test_Sem1;
        pend_multi_tbl[1].PendObjPtr=(OS_PEND_OBJ*)&Test_Sem2;
        pend_multi_tbl[2].PendObjPtr=(OS_PEND_OBJ*)&Test_Q;
    
        while(1)
        {
            index=OSPendMulti((OS_PEND_DATA*    )pend_multi_tbl,    
                              (OS_OBJ_QTY       )CORE_OBJ_NUM,  //内核数量
                              (OS_TICK          )0,     
                              (OS_OPT           )OS_OPT_PEND_BLOCKING,
                              (OS_ERR*          )&err);
            printf("task2 OSPendMulti index %d\r\n", index);
    
            OSTimeDlyHMSM(0,0,1,0,OS_OPT_TIME_PERIODIC,&err);   //延时1s
        }
    }

**实验现象**  
![1][]

[1]: /images/20220602/935aa210ee9f436c9aaec7fcc9d92845.png