实例：简单的任务间收发信息

beyes

功能：简单的任务间收发信息
目的：熟悉任务间的简单通讯
测试代码：

#include "includes.h"

  

#define  TASK_STK_SIZE                 512

  

OS_STK        DispCharMStk[TASK_STK_SIZE];        /* Tasks stacks                                  */
OS_STK    DispCharYStk[TASK_STK_SIZE];


   INT16S key;
   INT8U  y1 = 0;
   INT8U  y2 = 0;
  char *ss;
  char* s = "original data";
  void  DispCharM(void *data);                 
  void  DispCharY(void *data);

  


BOOLEAN ac_key = FALSE;
INT8U   time = 0;
void  main (void)
{

  PC_DispClrScr(DISP_FGND_WHITE + DISP_BGND_BLACK);    

  OSInit();                                            

  PC_DOSSaveReturn();                                  

  PC_VectSet(uCOS, OSCtxSw);                           

  

  OSTaskCreate(DispCharM, (void *)0, &DispCharMStk[TASK_STK_SIZE - 1], 0);
  OSStart();                                           

}

  

  

void  DispCharM (void *pdata)
{
#if OS_CRITICAL_METHOD == 3                              
  OS_CPU_SR  cpu_sr;
#endif


  char* s     = "DispCharM Received the Message!        ";    /*收到资源提示*/
  char* NoMessage = "DispCharM have lost the Message!       ";   /*资源被剥夺提示*/
  pdata = pdata;                                       

  OS_ENTER_CRITICAL();
  PC_VectSet(0x08, OSTickISR);                          

  PC_SetTickRate(OS_TICKS_PER_SEC);                     

  OS_EXIT_CRITICAL();

  OSStatInit();                                         

  OSTaskCreate(DispCharY,(void *)0, &DispCharYStk[TASK_STK_SIZE - 1], 2);


  for (;;)
   {

  if( ac_key == FALSE )
  {
   PC_DispStr( 5, 10, NoMessage, DISP_BGND_BLACK + DISP_FGND_WHITE);

  }else{
      PC_DispStr( 5, 10, s, DISP_BGND_BLACK + DISP_FGND_WHITE);
  }

  

  if( PC_GetKey(&key) == TRUE )
  {
   if( key == 0x1B )
   {
    PC_DOSReturn();
    }


  }
     OSTimeDly( 8 );


   }

}

void DispCharY(void *pdata)
{
#if OS_CRITICAL_METHOD == 3                               
  OS_CPU_SR  cpu_sr;
#endif

  char* s2 = "DispChary recycled the Message                   ";  /*强行回收资源提示*/
  char* s  = "DispCharY Send the Message to DispCharM          ";   /*发送资源提示*/

  pdata = pdata;

  for (;;)
   {

  time += 1;

  if( time == 10 && ac_key == FALSE )
   {
   PC_DispStr( 28, 15, s, DISP_BGND_BLACK + DISP_FGND_WHITE);
   ac_key = TRUE;
   }

   if( time == 20 )
   {
   ac_key = FALSE;
   time = 0;
   PC_DispStr( 28, 15, s2, DISP_BGND_BLACK + DISP_FGND_WHITE);
   }

  if( PC_GetKey(&key) == TRUE )
  {
   if( key == 0x1B )
   {
    PC_DOSReturn();
    }

  }

   OSTimeDly( 100 );
  }
}