Simple asm delay ?

[Jerson]

Assuming you have TMR0 (8 bit timer) free, you can try this code

AsmDelay macro  delayus
      movlw  0FFh-delayus    ; delayus to overflow                          1T
      movwf  TMR0                                                                            1T
      bcf        INTCON, T0IF    ; clear the timer0 Overflow flag          1T
      btfss     INTCON, T0IF    ; wait till it overflows                          1T/2T
      goto      $-1                   ; back to the btfss                              2T
  
      endm

The minimum delay you will achieve will be 4T cycles or roughly 2uS at 8MHz.


The way to use it would be

      GPIO = %01
      @ AsmDelay 12
      GPIO = %10
      @ AsmDelay 24

I hope this takes you closer to your goal. The code is just a concept, you may have to correct it. One important point you should note - the maximum delay will be 255uS