Need help with scaling

[champion]

I know this info has probably been posted before so I apologize for the repeat, but I cannot find what I'm looking for with the search function.

I am simply measuring angular displacement with a pot, using PBP's pot function. However, it is important to me to be able to display the angle in degrees and minutes. Therefore, I have done some mathematic scaling on paper to yield minutes. Here's what I've got:

360 degrees is broken into 255 units, thus 1.412 deg/unit

however, when I try and scale the reading I get from the pot command by this 1.412, it only uses 1.0.

What should I try???

[Melanie]

Take your 0-255 unit

Multiply by 1412 into a Dummy Variable

Then use DIV32 to divide by 10

example...

255 x 1412 / 10 = 36006

If you multiplied by 14118 and divided by 100 you would be more accurate yealding...

255 x 14118 / 100 = 36000

Either results gives you two decimnal places (remember we're playing integers here, so the two decimal places are the rightmost two characters of the result.

That won't be minutes though... it'll be DECIMAL degrees... you'll have to do some more math to calculate that into minutes.

You have a POT that rotates exactly 360 degrees?

[champion]

No, the pot has no detents or stops. It will rotate freely from 0 to 360 and back to 0. It's needed for my application to reduce the chance of damage if someone were to try and just spin the pot. Thanks a lot for your help with a rather elementry question.

[champion]

ok, how about this. Now that I have gotten into degrees, I have fractions of degrees that I can show on the LCD by outputing the 1 and 0 bit of the degree measurement. In order to convert these two bits into minutes, I have to be able to combine the 1 and 0 bits as one integer and multiply by 60. Again, this has probably already been mentioned before but I still can't find it in the search function. Thanks.

P.S.
I know this is a beginner's question, but I will bet that you all were beginners at one point as well so take it easy on me please. thanks!!!

[sayzer]

P.S.
I know this is a beginner's question, but I will bet that you all were beginners at one point as well so take it easy on me please. thanks!!!

I knew PBP when I was born



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[champion]

I knew PBP when I was born



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Me too, I just forgot it while I was in college