Bit manipulation in pic controllers

[electronicsLearner77]

I need to check for a flag like TRUE or False. Can i use char data type or bit type? By creating bit type is it advantageous? I mean to say will it reduce execution time? Also i want the code to be portable. Please advise.

 

[Minder]

If a unique bit in a word or file, BTFSS, BTFSC.
If you want to change it or clear it etc, then one of the Math operations XORWF etc etc.
M.

 

[Amar Dhore]

Yes it is very useful and it is a very general logic and not specific to the controller. It saves space and execution time as the processor has to deal with a variable.
I do it like this:

#define bit_mask (err1 | err2 | err3 | .....|err8)
define or declare err1, ...err8 as a bit.
Now,
You can clear a bit with simply "AND" and set with "OR" logic.
lets say I have to set a flag for err8 then

uint8_t flagCeck;
flagCeck = bit_mask | err8;
clear with
flagCeck = bit_mask & err8;

Hope this helps.