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how to convert hex to dec value.

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Arunkumar.s

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I want to convert hex to dec using PIC. Thing that I want to do is that:

I have 24 byte (like FFFFFF, 800000, 000000) in three register in PIC .
Converting of FFFFFF to decimal result is +4.096.
Converting of 800000 to decimal result is 0.
Converting of 000000 to decimal result is -4.096.

FFFFFF is the positive full scale of +4.096,
000000 is the negative full scale of -4.096,
800000 is the middle value of the scale 0.

I want to write this convertion result to PIC's registers.
How can I do that?

Help me to solve tis problem...
 

It's not clear, if you want to convert the input number to a float or fixed point value, or to a decimal string? In case of fixed point or decimal string, is three fractional digits the intended resolution? 24 Bit has 6 to 7 significant decimal digits.

As a first step you need to convert the 24 bit value from offset binary to 2s complement by inverting the MSB (number ^ 0x800000), then scale it down to the intended number range.
 

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