Question about mathmatical operations in the basic stamp

electroman

Hi,

I am using the basic stamp 2, and I'm facing a problem,
is it·possible to deal with decimal numbers in the basic stamp?
and if not, is there away to link the basic stamp with pc with a bluetooth
connection such that i can use anothor pragram (MATLAB)·to do the complicated caculations
and then send the instructions to the basic stamp???


I hope that some one can help me


thanks

Post Edited (electroman) : 8/20/2009 5:48:49 PM GMT

Franklin

yes, if you want two digits decimal multiply the number by 100 and do the math.
You can also connect to a pc using bluetooth as a serial interface between the two.

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- Stephen

electroman

I can't, because the final answer will be a decimal number,
Example calculation : H = 0.5 * 3.14 + 0.15 which equals 1.72
then i will substitute the result in : PAUSE H
so if the basic stamp could not read that number as a decimal number, everything will go wrong




thanks

GeorgeL

Isnt there a math co-proccesor or something like that on Parallax's website?

electroman

I'm not sure about that

Post Edited (electroman) : 8/20/2009 8:11:54 PM GMT

Mike Green

H = 0.5 * 3.14 + 0.15

This is equivalent to

H = 3.14 / 2 + 0.15

If you scale this to two decimal places, you'd have

H = 314 / 2 + 015

You do need to make this an integer to use in a PAUSE, so you'd do

PAUSE H / 100 if you want it rounded, you'd do PAUSE (H + 050) / 100

Note that the pause is in whole milliseconds only. There are ways to use
PULSOUT to produce smaller pauses, but the BS2 still takes a couple of
hundred microseconds to execute its statements and you'd have to work
that into your delays to get something at all accurate.

electroman

thanks for your help, I'll try it