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How to convert 2's complement binary value into actual decimal value

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Ganesh singh

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Hi everybody,
My sensor output is 2,s complement ( to handle the negative values) . so now i have to show the result in decimal with proper sign.

can anybody help me in this ....
i am using Hitech C. and my microcontroller is PIC16F1783.
 

Once you have obtained a positive binary value...

Count how many times you can subtract a power of ten. If your number is, say 3456, then subtract 1000. Each time you do, increment a counter.

When you can't subtract 1000 any more, start subtracting 100. Start the next counter, incrementing each time.

Etc.

Until you reach 0.

Convert the stored count values to ASCII numerals. Print them one after the other. The first character should be a plus or minus sign, based on whether your initial value had a 1 in the most significant bit position.
 

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