Thread: 4x4 software differential
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Unread 24-06-2002, 00:21
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#0047 (ChiefDelphi)
  
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'Min 0' does NOTHING!!!
Posted by Joe Johnson.   [PICTURE: SAME | NEW | HELP]


Engineer on team #47, Chief Delphi, from Pontiac Central High School and Delphi Automotive Systems.

Posted on 11/8/2000 8:55 PM MST


In Reply to: Re: 4x4 software differential,oops posted by James on 11/8/2000 8:10 PM MST:



One more thing I just noticed about your PBASIC code.

The line of code below will always leave Variable unchanged (even if Variable='-1')

Variable = Variable MIN 0

This is because in 16 bit unsigned math, (A MIN 0) is ALWAY equal to A. There is nothing less than 0 in unsigned math.

One way of getting around this is to do the following:

Variable = $8000 + Variable MIN $8000 - $8000

Now if Variable='-1' before the statement it will equal 0 after.

This is a very important lesson to learn when working with PBASIC.

Joe J.



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