jumping out of subroutine with goto

[helloo]

Hey @ all,
I wonder what happens within the µC when I write code that jumps out of a subroutine with the goto command?

Example:

main:
   GOSUB label
goto main

label:
   GOTO somwhereelse
RETURN

somwhereelse:
   DOSOMETHING HERE
GOTO main

I know from other BASIC dialects that one should'nt do this, because it messes up the pointers. But what happens in PBP eg. the PIC itself?

Is there a better solution for this problem?

Greetings, helloo

[spcw1234]

I recently had a project I was working on that would work fine for a while, then reboot and work fine for a while, then completely lock up. After a power cycle this would repeat. The project had buttons, and I was polling the buttons in a subroutine, if a button press was detected I jumped somewhere else using a goto. I soon realized there was a pattern and it was a certain number of button presses, I forget exactly how many. I moved my button polling routine to the main loop instead of a subroutine and it fixed the problem. I assume a stack was overflowing causing the problems because of using a goto inside of a subroutine.

[Normnet]

Hey @ all,
I wonder what happens within the µC when I write code that jumps out of a subroutine with the goto command?

Example:

main:
   GOSUB label
goto main

label:
   GOTO somwhereelse
RETURN

somwhereelse:
   DOSOMETHING HERE
GOTO main

I know from other BASIC dialects that one should'nt do this, because it messes up the pointers. But what happens in PBP eg. the PIC itself?

Is there a better solution for this problem?

Greetings, helloo

Try:

main:    
  GOSUB label
  IF bit1 = 1 then
    GOTO somwhereelse
  Endif 
  goto main  

label:    
     'GOTO somwhereelse
     F x > 3 then
        bit1 = 1 'set a flag
     Endif
     RETURN
     ...  
 RETURN 

 somwhereelse:
     DOSOMETHING HERE 
 GOTO main

Norm

[rsocor01]

Hey @ all,
I wonder what happens within the µC when I write code that jumps out of a subroutine with the goto command?

Example:

main:
   GOSUB label
goto main

label:
   GOTO somwhereelse
RETURN

somwhereelse:
   DOSOMETHING HERE
GOTO main

I know from other BASIC dialects that one should'nt do this, because it messes up the pointers. But what happens in PBP eg. the PIC itself?

Is there a better solution for this problem?

Greetings, helloo

Or, you can try this,

main:
   GOSUB label
goto main

label:
   GOSUB somwhereelse
RETURN

somwhereelse:
   DOSOMETHING HERE
RETURN

Use GOSUB and RETURN instead of GOTO.

Robert

[helloo]

Thanks for all. That is a solution to the problem. Thank you.