From c to pbp

[Jerson]

The delays shown by Bruce are mistakenly wrong. The original code shows delay_cycles(59) That is delay for 59 cycles. So, by using Bruce's code as a start, you can make the delay for 59 cycles. This will give you the correct timings. Another thing, the oscillator is 20MHz. So, the initial define has to be

define OSC  20000000

cntr    byte    1

delay_cycles59:             ' 2 cycles to get here

asm
         MOVLW  11          ' 1 cycle
         MOVWF  _cntr      ' 1 cycle
loop:  DECFSZ _cntr,F     ' 1 cycles  (3*17+1 = 52)
         GOTO   loop          ' 2 cycles
         nop                    ' 1 cycle
         return                 ' 2 cycles

endasm

The above has a subroutine to give you an exact delay of 59 cycles. You can call the function from PBP like this

         gosub  delay_cycles59