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Variable sharing in RTX-51 Tiny

HiKarthik Ragunath Gopal over 16 years ago

Hi,

I am using a global variables for producing timeouts as follows...

volatile tDByte TimerStart=0,TimerEnd=0,TimerInitiated=FALSE,Timeout=FALSE;

there are two tasks....task1:Clock and task2:OperateField which requires timeout...

void task3_Clock() _task_ TASK3
{
  while(1)
  {
         os_wait (K_IVL,200,0);/*500 ms interval*/
         os_wait (K_IVL,200,0);/*500 ms interval*/
         Seconds++;
         if(Seconds>=59)
         {
          Seconds=0;
         }
         if(TimerStart==TimerEnd)
         {
          TimerStart=0;TimerEnd=0;
          Timeout=TRUE;
          TimerInitiated=FALSE;
         }
         else
         {
          TimerStart++;
         }
  }

}
void task4_OperateField() _task_ TASK4
{
  while(1)
  {

   if(TimerInitiated==FALSE)/*If Timer is not fired then fire the timer*/
                                        {
                                                Timeout=FALSE;
                                                TimerStart=Seconds;  /*Read the current  status of the SW clock*/
                                                TimerEnd=Seconds+10; /*Set timer End as 10 seconds             */
                                                TimerInitiated=TRUE; /*Set flag as timer initiated             */
                                        }
                                        if(Timeout==TRUE) /*If 10 second timer expired     */
                                        {
                                                Point1=0x00; /*Then clear the command received*/
                                        }
  }

in these two tasks are using the same variables.....TimerEnd,TimerStart,Timeout,TimerInitiated...
These variables after time out it is initilized to some values in task3...but when returning to task 4 it restore the previous values....how to share the variables....kindly help me....