(uC/OS-II学习笔记) 事件标志……

 原文出处：

http://www.cnblogs.com/hebaichuanyeah/

uC/OS-II事件标志数据结构

    typedef struct os_flag_grp                  /* Event Flag Group                                        */
    {
        INT8U         OSFlagType;               /* Should be set to OS_EVENT_TYPE_FLAG                     */
        void         *OSFlagWaitList;           /* Pointer to first NODE of task waiting on event flag     */
        OS_FLAGS      OSFlagFlags;              /* 8, 16 or 32 bit flags                                   */
#if OS_FLAG_NAME_EN > 0u
        INT8U        *OSFlagName;
#endif
    } OS_FLAG_GRP;

事件标志，相对于事件块，是个多输入多输出的结构。通过.OSFlagFlags相应位和OSFlagNodeFlags筛选出目标输入。

程序 建立5个任务。

OS_STK Task1_Stk[512];  
OS_STK Task2_Stk[512];
OS_STK Task3_Stk[512];  
OS_STK Task4_Stk[512];
OS_STK Task5_Stk[512];  



void main()
{

    OSInit();                                               
   
    OSTaskCreate(Task_Accept ,        (void *)0,&Task1_Stk[511],5); 
    OSTaskCreate(Task_Girl,           (void *)0,&Task2_Stk[511],6); 
    OSTaskCreate(Task_Woo,            (void *)0,&Task3_Stk[511],7); 
    OSTaskCreate(Task_Responsibility, (void *)0,&Task4_Stk[511],8);  
    OSTaskCreate(Task_Meet,           (void *)0,&Task5_Stk[511],9); 
 

    OSStart();                                           
}

程序，事件标志&&任务调度

void Task_Accept(void *pdata)
{
    U8 err;
    U32 Count;
    char EDN[] = "She accepted me, and we fell in love.  ";
#if OS_CRITICAL_METHOD == 3   //关中断的方法为3
    OS_CPU_SR cpu_sr;
#endif
    
    OS_ENTER_CRITICAL();
    OS_CPU_SysTickInit(100000000/OS_TICKS_PER_SEC);
    OS_EXIT_CRITICAL();
    
    OSStatInit();   //统计任务 优先级最低
    
    
    UART4_Init(115200);
    
    pdata = pdata;                              

    MyFlag = OSFlagCreate(0,&err);
    
    

    while(1)
    {
        if(OSFlagPend(MyFlag,(OS_FLAGS)12,OS_FLAG_WAIT_SET_AND,0,&err) == 12)
        {

            for(Count=0;EDN[Count];Count++)
                Uart4_SendByte(EDN[Count]);
            
            for(Count=0;Count<100;Count++)
                Uart4_SendByte(' ');
                
            OSTaskSuspend(5);
        }
        else
            OSTimeDly(1);  
    }  

    
}

void Task_Girl(void *pdata)
{
    U32 Days = 0;
    U32 Count;
    U8 err;    
    char Girl_Think[]="Girl thinks:perhaps,he is a nice guy     ";
    pdata = pdata;                              

    while(1)
    {
        if(OSFlagPend(MyFlag,(OS_FLAGS)1,OS_FLAG_WAIT_SET_AND,0,&err) == 1)
        {
            if(Days >= 5)
            {
                for(Count=0;Girl_Think[Count];Count++)
                    Uart4_SendByte(Girl_Think[Count]);
                
                for(Count=0;Count<100;Count++)
                    Uart4_SendByte(' ');
            
                OSFlagPost(MyFlag,(OS_FLAGS)8,OS_FLAG_SET,&err);
                OSTaskSuspend(6);
                
                //OSTimeDly(100);
            }
            else
            {
                Days++;
                OSTimeDly(100);
            }
        }
        else
            OSTimeDly(1);  
          
         
    }  
  
}

void Task_Woo(void *pdata)
{
    U16 Days=0;
    U16 Count;
    U8 err;
    char Woo_str[]= " I fell in love with this girl.I decide,I should be woo this girl desperately.     ";
    pdata = pdata;       
    while(1)
    {
      
        if(OSFlagPend(MyFlag,(OS_FLAGS)3,OS_FLAG_WAIT_SET_AND,0,&err) == 3)
        {
            if(Days >= 5)
            {
                for(Count=0;Woo_str[Count];Count++)
                    Uart4_SendByte(Woo_str[Count]);
                
                for(Count=0;Count<100;Count++)
                    Uart4_SendByte(' ');
                
                OSFlagPost(MyFlag,(OS_FLAGS)4,OS_FLAG_SET,&err);
                OSTaskSuspend(7);
            }
            else
            {
                Days++;
                OSTimeDly(100);
            }
        }
        else
            OSTimeDly(1); 


    }  
}

void Task_Responsibility(void *pdata)
{
    U16 Days = 0;
    U16 Count;
    U8 err;
    char Responsibility_str[]= " I feel,I have the ability to shoulder the responsibility of protecting a girl.    ";
    pdata = pdata;                              

    while(1)
    {
        if(Days>=10)
        {
            
            for(Count=0;Responsibility_str[Count];Count++)
                Uart4_SendByte(Responsibility_str[Count]);

            for(Count=0;Count<100;Count++)
                Uart4_SendByte(' ');
            
            
            OSFlagPost(MyFlag,0x02,OS_FLAG_SET,&err);
            OSTaskSuspend(8);
        }
        else 
            Days++;
        
        OSTimeDly(100);         
    }
}

void Task_Meet(void *pdata)
{
    U16 Days = 0;
    U16 Count;
    U8 err;
    char Meetstr[]= " Today,I met a pretty girl.    ";
    pdata = pdata;                              

    while(1)
    {
        if(Days>=10)
        {
            
            for(Count=0;Meetstr[Count];Count++)
                Uart4_SendByte(Meetstr[Count]);
            
            for(Count=0;Count<100;Count++)
                Uart4_SendByte(' ');
                  
            OSFlagPost(MyFlag,0x01,OS_FLAG_SET,&err);
            OSTaskSuspend(9);
        }
        else 
            Days++;
        
        OSTimeDly(100);       
       
    }
}