PIC Microcontoller Bit Math Method

Shifting long strings of bits

by Scott Dattalo

set_bit:

     movf   bitmask,w

     iorwf  indf,f
     btfsc  new_state,0
      xorwf indf,f

     clrc
     rlf    bitmask,w
     rlf    bitmask,f

     btfsc  bitmask,0
      incf  fsr,f


9 words/cycles in assembly,

also:

• PIC Microcontroller C Routine Shifting long strings of bits (has some assembly code as well)
• PIC Microcontroller Math Routine Setting bit number X
• PIC Microcontroller IO Routine High speed serial IO pin sampleing