用邮箱通信实现按键控制

奋斗 · 发表于 2012-6-7 20:27:04

我想实现以下功能：三个按键控制三个圆环在OLED屏上显示，按一个按键显示相应大小的环。但是我的程序每运行一次只有一个按键可以实现，另外两个不管用。跪求高手指点！！！！

//开始任务
void TaskStart(void * pdata)
{
pdata = pdata;
OS_ENTER_CRITICAL();
OSTaskCreate(Taskhuanshu, (void * )0, (OS_STK *)&TASK_huanshu_STK[huanshu_STK_SIZE-1], huanshu_TASK_Prio+1);
OSTaskCreate(Taskkeycontrol, (void * )0, (OS_STK *)&TASK_keycontrol_STK[keycontrol_STK_SIZE-1], keycontrol_TASK_Prio);
yx=OSMboxCreate((void *)0);
OSTaskSuspend(START_TASK_Prio); //suspend but not delete
OS_EXIT_CRITICAL();
}
//任务1
//环显示
void Taskhuanshu(void *pdata)
{ char *rasm;
   INT8U err;
   u16 dat;
   rasm=(char *)OSMboxPend(yx,0,&err);
   dat=*rasm;
for( ;;)
   { if(KEY_Scan()==1||KEY_Scan()==2||KEY_Scan()==3)
     { OSTaskSuspend (huanshu_TASK_Prio);
      }
      switch(dat)
      {
       case 0:

    OLED_ShowString(78,3,"1");
    Draw_Circle(60,40,15);
       OLED_Refresh_Gram();
       OSTimeDlyHMSM(0,0,0,100);
    OLED_Fill(37,17,83,63,0);
      OLED_Refresh_Gram();
    case 1:
        OLED_ShowString(78,3,"2");
    Draw_Circle(60,40,19);
     OLED_Refresh_Gram();
      OSTimeDlyHMSM(0,0,0,10);

   case 2:
    OLED_ShowString(78,3,"3");
      Draw_Circle(60,40,23);
    OLED_Refresh_Gram();
   OSTimeDlyHMSM(0,0,0,10);
   }
   rasm=(char *)OSMboxAccept(yx);
    if(rasm!=(void *)0)
        dat=*rasm;

   }
   }
//任务2
//按键控制
void Taskkeycontrol(void *pdata)
{ char rasm;
for(; ;)
{ OLED_ShowString(0,0,"huanshu :");
OLED_Refresh_Gram();
  while(1)
    {if(KEY_Scan()==1)
    {rasm=0;
  OSTaskResume (huanshu_TASK_Prio);
    OSMboxPostOpt(yx,(void *)&rasm,OS_POST_OPT_BROADCAST);
  }
  else if(KEY_Scan()==2)
   {      OSTaskResume (huanshu_TASK_Prio);
   rasm=1;
      OSMboxPostOpt(yx,(void *)&rasm,OS_POST_OPT_BROADCAST);}
  else if(KEY_Scan()==3)
   {      OSTaskResume (huanshu_TASK_Prio);
   rasm=2;
    OSMboxPostOpt(yx,(void *)&rasm,OS_POST_OPT_BROADCAST); } }