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

I guess I need some of the asm experts help on this one. I am using an SX-Tech board, all standard issue from Parallax. The program below, when I do a 'Run', with the SX-Key pluged in, works as expected. The again loop waits for the IR signal, gets the signal, goes to the delay sub, does its thing, comes back, and waits for another IR signal. Everything works as expected.

The next thing I did is 'Program', unpluged the power, unpluged the SX-Key, pluged in the 50MHz crystal, pluged in the power, and the LED goes on and stays on, not what is expected. I think that there is a problem with the way the compiler is handling the different IDE modes of 'Run', 'Program', ..., etc. I know that it is a bold accusation, but thats where the trail took me. I am really surprised that something like this has not occured to someone else. I am pretty certain that the equipment is OK because when I 'Program' other programs everything seems to work as expected, while it is done in the 'Run' mode. Now, if I can get a confirmation about this, then maybe I can work on something else. Any comments from anybody.

Ray

 

*****CODE

;;;
;; New28IR.src
;;;

device sx28,stackx,turbo
device oschs3      ;High speed crystal, 1MHz - 75MHz
;IRC_CAL IRC_FAST   ;For use with external crystal/oscillator
freq 50_000_000    ;Need this at 50MHz so delay works ~ 2.7 seconds

reset Main      

 

;; Variables
 org $08
Counter1 ds 1
Counter2 ds 1
Counter3 ds 1

IRpin = rc.0     ;IR detector
LEDon = rb.0     ;LED

 org $0
Main
; mov w,#$1F
; mov m,w
 mov !rb,#%11111110 ;Set rb.0 for output
again
 snb IRpin          ;Waits for IR signal
 jmp again          ;
 call delay         ;Go do delay
 jmp again      ;Comes back from delay
                       ;goes to again and waits for IR signal

;;This is my delay loop, ~2.7 seconds @50MHz freq
delay:
 clrb LEDon
pause   ;~ 1.35 seconds @50MHz freq
 decsz Counter1
   jmp pause
 decsz Counter2
   jmp pause
 decsz Counter3
   jmp pause
 setb LEDon      ;Turn the LED on
;pause1
; decsz Counter1
;   jmp pause1
; decsz Counter2
;   jmp pause1
; decsz Counter3
;   jmp pause1
; setb LEDon      ;Turn the LED off

ret                    ;Go back to where you were called at


jmp $
end                ;End of code

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