Stack Under flow

[mister_e]

look if there's a part of your code ended with a return but uncalled by a Gosub

well this is the only thing that make sense to me.

Will be easier to say if you post your code Here.

[sinoteq]

.................................................. .........................

[Wayne]

HI Sinoteq
There is one gosub and one return. so I would think the return
would go back to GETKEY. Yes
Or did I not understand your comment.

Thanks
Wayne

[mister_e]

start:
'
'
'

LED1=0 '

main:
GoSub getkey

getkey:
kp1=0 'Clear kp1

after Main, should have a goto start or something like that

But i didn't get any error within MicroCode Studio using MPASM but get error with PM about WDTCON and LCDCON... in the PM M16F91X.inc file it miss those two lines

WDTCON		    equ     105h
LCDCON		    equ     107h

but shouldn't be the cause IMO

[Wayne]

Hi Steve
You only get the error if you use the MPLAB SIM tool or program the PIC
and install it in the board.


Thanks
Wayne

[mister_e]

So to be clear does

main:
GoSub getkey
Goto Start     ' <=== Add this line

getkey:
kp1=0 'Clear kp1

fix the problem... i guess yes !?!

[Wayne]

Hi Steve (MR. E)

Yes that did work and thank you very much for the help.
But one more thing WHY and what is a stack underflow?

Again Thanks

Wayne