PIC Assembly

[lastiku]

I would like someone to help me with a problem I encountered. In the source code I am currently writing I need to divide by 2 one of the variables. Can any one help me please, with an asssembly language source code?. Also I would like to know if percentage are possible to calculate using assembly language, for the Microchip PIC.
Thank you.

 

[Nigel Goodwin]

I would like someone to help me with a problem I encountered. In the source code I am currently writing I need to divide by 2 one of the variables. Can any one help me please, with an asssembly language source code?. Also I would like to know if percentage are possible to calculate using assembly language, for the Microchip PIC.
Thank you.

Dividing by 2 is extremely easy, all you do is shift the variable to the right one bit (to multiply by 2 you shift it left). The code looks like this:

RRF Variable, f

That's it!.

As for percentage, you can do any maths you want, it's simply a question of writing the code for it. But with any maths on a PIC it's best to avoid floating point, by careful scaling of the values you can use integer maths for most functions.