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Originally Posted by Random Dude
Whats wrong with signed chars? I've converted all my PWM signals to signed to simplify the math.
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I have done the same. The reason i specified unsigned chars is bc they take more instructions to process. This translates into larger programs and slower execution times. If you arn't having problems with speed and or space i wouldn't worry about it. If you want to demonstrate this for yourself, write a program that does some signed and unsigned operations, and then look at the assembly code.