WORD bug

[Bruce]

Sorry, but I still do not understand why you think this is a bug?

With the PIC operating at 8MHz, you have an execution speed of 2 million single cycle instructions per second. That's fast..!

If you increment decideInterval on each pass through your loop, of course it will = 600 at some point. And very quickly.

Here's another example;

init:
      decideInterval  var  WORD
      TIMEINTERVAL	  con  600
      decideInterval = 0

main:
      decideInterval = decideInterval + 1
      IF decideInterval = TIMEINTERVAL then
          decideInterval = 0
          GOTO Match
      ENDIF
      GOTO  MAIN

Match: ' End up here in approximately 11.4mS
      GOTO Match
	
		END

From Main, through the loop once, then back to Main at 8MHz only takes around 19uS. Now take 19uS * 600 for ~11.4mS.

It takes only ~11.4mS before you increment decideInterval from 0 to 600, and then the IF/THEN statement evaluates as TRUE, and program flow jumps to Match.

Note: I verified this (PBP v2.46). It does not jump to match at 11. Only once
decideInterval = 600.