gnupic: Has anybody used the AN575 floating point library?
Subject:
Re: Has anybody used the AN575 floating point library?
From:
"George M. Gallant" ####@####.####
Date:
22 Dec 2004 00:27:37 +0000
Message-Id: <41C8BFB6.9070800@comcast.net>
Mark,
I don't know the specifics of the function you are using, but the
"typical" byte order is
little endian. You might also try the sdcc library.
George
Mark Rages wrote:
>>From the application note:
>
>INTEGER TO FLOAT CONVERSION
>The routine FLOxxyy converts the two's complement
>xx-bit integer in AARG to the above yy-bit floating point
>representation, producing the result in AEXP, AARG.
>The routine initializes the exponent to move the radix
>point to the right of the MSb and then calls the normal-
>ize routine. An example is given by
>FLO1624(12106) =
>FLO1624(0x2F4A) =
>0x8C3D28 =
>12106.0
>
>So I try it:
>
> movlw 0x00
> movwf AARG
> movlw 0x2F
> movwf AARG+1
> movlw 0x4A
> movwf AARG+2
>
> call FLO2424
>
>After this,
>AARG=0x000e8e
>
>Regards,
>Mark
>markrages@gmail
>
>
>On Fri, 19 Nov 2004 17:33:24 -0500, David Willmore
####@####.#### wrote:
>
>
>>>I'm having a hard time getting the AN575 libary to work on a 16F688.
>>>
>>>I am using the files "MATH16.INC" and "FP24.A16"
>>>
>>>Is anyone here familiar with this library? I've been trying to get the
>>>int->float conversion to do something, anything...
>>>
>>>
>>I've played with it some. I used the FT32.A16 library, but there
>>shouldn't be too much difference. What are you trying and what
>>are you seeing?
>>
>>Cheers,
>>David
>>
>>
>>
>
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