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

Here is a new snippet, right out of Guenthers book. I had this code setup on my SX28 tech  board, so I know that it works.

I made the modification for it to run on my SX52 board. All I have is an LED circuit on the breadboard, just as described in the book. Again, what is expected is a pause, turn the LED on, a pause, turn the LED off, jmp to the top of the loop and do it over again and again. 

When I run it, the LED turns on and never turns off, no pauses what so ever. In the tutorial a freq 50_000_000 is used, so the freq are matched. The only difference is, the tut uses OSCHS2, I use the OSCHS3. So, I am wondering, does the SX52 have some kind of effect on the pause part of the the code. On the SX28 you could definitely see the LED pause.

Ray

 

*****CODE

;;;
;; tut003sx52.src
;;;

device sx52
device oschs3      ;High speed crystal, 1MHz - 75MHz
IRC_CAL IRC_FAST   ;For use with external crystal/oscillator
freq 50_000_000

RESET Main

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

 org $100
Main
 mov w,#$1f          ;SX52 specific
 mov m,w

 mov !rd, #%11111110


Loop
 decsz Counter1
   jmp Loop
 decsz Counter2
   jmp Loop
 decsz Counter3
   jmp Loop
 clrb rd.0
Loop1
 decsz Counter1
   jmp Loop1
 decsz Counter2
   jmp Loop1
 decsz Counter3
   jmp Loop1
 setb rd.0
jmp Loop

end                ;End of code

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