variables and gosubs???

[sayzer]

...

The subroutines don't return to the SubSwitcher, they return back to the while loop.

...

If there is no typo here, did I misunderstand this statement then ?



-----------------------------

[rhino]

I'm a little confused as well. I guess as a test, you can put a statement under the branch instruction to flash an LED or something to see what happens. The way I read it is it will return back to the while loop because there is nothing else in the SubSwitcher routine to execute after the branch statement, just another return back to the while loop.

[Darrel Taylor]

Ok guys, sit back, take a breath, give me a little while to come up with a better answer.

All will be revealed. Or further confused. We'll see.

[mister_e]

I'll try something...

StartPoint:
    Gosub Somewhere
Label1:
    Pause 100
    Goto Start
Somewhere:
    Pause 1
    Return

Nothing hard here right? after the Return... you return to Label1 ... right?

Now...

StartPoint:
    Gosub Somewhere
Label1:
    Pause 100
    Goto Start
Somewhere:
    Goto SomewhereElse
    z: goto z    

SomewhereElse:
    Return

Same thing happen here...

This said...

Start:                         
      for routines=0 to 3
StartPoint:
          gosub subselect
ReturnPoint:
          pause 200
          next
    goto start

SubSelect:
          branchl routines, [Routine0, Routine1, Routine2, Routine3]    
          
Routine0:
         return

Where the Return of Routine0 leads you?... to ReturnPoint

I know i'm a pretty bad teacher...

[sayzer]

and I am a good student.


I thought that once the program jumps, then it will forget where it was and will return to an unknown place. So that it will never be 100% precise.


---------------------

[mister_e]

Gosub and Return are good friends...

As long as you have a GOSUB... you can insert 2789423564875634275624365 432956345634564326586324957243657 234596243652 43656243756243654 356437856 46582436587243657 26435726435 2436 (+/- 1) goto in-between. And when you'll use Return, it will return just under the GOSUB.

[SteveB]

I thought that once the program jumps, then it will forget where it was and will return to an unknown place. So that it will never be 100% precise.

To be even more specific, the GOSUB will put a return address on the top of the "Stack" It will remain there forever (as long as the PIC is not reset) until a RETURN is executed. So, Steve's 2.7894235e+128 GOTOs do nothing to modify the address on the top of the stack. And, no matter when the RETURN is executed, the program will return to that address.

HTH,
Steve B

[mister_e]

SteveB....SteveB....SteveB....
SteveB....SteveB....SteveB....
Whizzz... Woohoo...

<img src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=1198&stc=1&d=116388100 4">

[Darrel Taylor]

So much for my fancy reply. Too slow.

Got it Sayzer??