UCOSIII等待多个内核对象

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