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Hex (From ADC) to Float number

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mymadi

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Dear all forumer,

I have a little bit problem how to convert the hexadecimal (the value read from ADC) to a floating point. Currently i'm doing the Fuzzy Logic that need range from -1000 to 1000

so i have some idea how to convert it, it is possible:

Code:

Code: 
float e;

e = ((ADC - 128)/128)*1000;


128 is the setpoint (128H is equal to 0)

Thats mean the idea is:

0H is equal to -1000
128H is equal to 0
255H is equal to 1000


Please help me!!! :idea:
 

The code that you've written should do what you want on most compilers.

You can also try casting
Code: 
float e; 

e = (float) ((ADC - 128)/128)*1000;

It would help if you tell us which compiler you are using.
 

    M

    mymadi

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kender said:
It would help if you tell us which compiler you are using
Click to expand...

Thank you... Currently i'm using SDCC... free compiler for 8051.
 

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