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

Thanks for the info.

Yes my GPS unit is putting out floats. (Trying to control a 10,000 dollar GPS unit with 50 bucks worth of parts.)

Would this be easier with a propeller or stamp?

 

 



[quote="PJMonty"]
Lucas,

Your GPS is putting out floating point data?

If you really need a floating point comparison, you'll first need to find out what floating point format the data is stored in. If it's IEEE-754, then you're ahead of the game. Check out this page:

[url=http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm]www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm[/url]

In particular, look down the page under the heading [b]Comparing using integers[/b]. This describes a features of IEEE-754 floats which says that if you're just doing a comparison, you can treat the data as 32 bit integers and then simply compare tham. For this you'll need to find out the value of .02 as an IEEE-754 format float, and then do a 32 bit integer compare of it to your incoming data. 

Thanks,
PeterM
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