In SX Microcontrollers, SX/B Compiler and SX-Key Tool, AmitJ wrote:

I am trying to run a serin command with a timeout from within a subroutine.  However if the timeout occurs I still want to return to the command after the subroutine call.  An example of what I want to do is below.  The problem is that the variable gled1 never gets cleared in normal run mode if the timeout occurs.  However if I uncomment the break and run it in debug mode it works fine.  I am checking the pin status using a good scope.

From my understanding the timeout triggers a jmp to 'missed' so the original return address should still be at the top of the stack.  The return in 'missed' or 'rs' should be accessing the same address, I think.  If I replace the serin with 'goto missed' it also only works in debug mode.  Anyone have any suggestions?

Also is there any way to empty the call stack?

Thanks a lot!
Amit


[code]
DEVICE          SX48, OSCHS2
FREQ              50_000_000
PROGRAM	      start

GLED1		  var	RC.2		'LED
RLED2		  var	RC.3		'LED

missed            sub                      'signal missed comm
rs                   sub                      'receive serial comm

start:
	temp = 0
	output gled1
	output rled2
	goto mainloop

rs:
	\clrb rled2
	serin ra.0, T57600, temp, 1, missed
	'goto missed
return


missed: 
	\setb rled2
return


MainLoop:
	\setb gled1
	rs
	\clrb gled1
	temp=6
'	watch temp
'	break
goto MainLoop
[/code]

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