Multitasking problem - can't use the value returned by bgetc

[Andrew83]

Multitasking problem

Hello !

I'm trying to ma a multitasking application.

One of the tasks is to receive a character over serial and convert it co binary form.

The problem is this : i can't use the value returned by bgetc() in the check_SERIAL() function.

I'm using pic18f452 @ 10 MHZ and CCS C compiler version 4.057.

Here is the code :

#int_rda
void serial_isr() {
   int t;
   output_toggle(pin_b1);   //debug
   buffer[next_in]=getc();
   t=next_in;
   next_in=(next_in+1) % BUFFER_SIZE;
   if(next_in==next_out)
     next_in=t;           // Buffer full !!
}

BYTE bgetc() {
   BYTE c;

   output_toggle(pin_b2); // debug
   while(!bkbhit) ;
   c=buffer[next_out];
   next_out=(next_out+1) % BUFFER_SIZE;
   return(c);
}

void check_SERIAL( void)
{
char i,d;

if(gc_IRTRANSMIT_timer)
   {
   output_toggle(pin_b3);
   return;
   }
else
 
   {
   
   gc_IRTRANSMIT_timer  = IRTRANSMIT_TIMER_TICKS;
   output_toggle(pin_b4);  //debug
    for(i = 0; i < 8; i++)
            {
             output_toggle(pin_b5); //debug
             if( bgetc() & 0x80)
               d='1';
             else
               d='0';
              bgetc() <<= 1;
               cmd[i]=d;
             }
        cmd[8]=0;
       output_toggle(pin_b6); //debug 

            printf("%s",cmd);
   }
}

Any ideas ?

Thank you very much !!

 

[dolhoemti]

Re: Multitasking problem

Hello. Try to create a fixed string, and compare the receive register to her. If equal do that....
Regards

 

[Andrew83]

Re: Multitasking problem

Thank you !:idea: