An issue with the stack maybe?

MarkCrCo

I have encountered a problem that appears like it might be related to the stack if the basic stamp uses a stack like I assume it does. I call this particular routine but it never returns and instead resets the stamp. “Found it” prints but neither “fell through” or “Back” does. This call to find_motion is the one and only call to that routine. Any Ideas?


GOSUB find_motion
DEBUG " Back ",CR
PAUSE 1400

'______________________________________________________________
find_motion:
''DEBUG "Finding Motion", CR
GOSUB Sweep_find
Whereisit = 0
...
...
...
LOW 8
LOW 0
LOW 1
DEBUG "found it",CR
'PAUSE 2000
SLEEP 1
RETURN

DEBUG "fell through"

Genetix

MarkCrCo.

The BS2 is limited in how many GOSUBs that can be nested. (GOSUB does a GOSUB which does a GOSUB, etc.)

I think the limit is 8 but it's mentioned in the BASIC Stamp Manual.

Mike Green

The limit is 4. See the description in the chapter on the GOSUB statement in the Basic Stamp Manual

tomcrawford

Would have to see the entire program, but what you show there will fall into the subroutine after the PAUSE 1400.

MarkCrCo

There is more code after the pause 1400 which includes an end statement. I'll check on the number of gosubs, it is possible I have too many.