Carlos Junior:

It is a happy time to hear that your 4-bit initialize code works. The next step is to learn how to reduce the size of the code to a lesser amount while at the same time making it a lot more clear what is being sent out.

Now whilst I cannot comment on the correctness of your code for for your particular display or for how you have your prototype wired up please review this.

;
ini_out:
    acall ini_out1  ;output high nibble of a
    swap a          ;arrange for output of low nibble
ini_out1:
    rlc a
    mov p0.0,c
    rlc a
    mov p0.1,c
    rlc a
    mov p0.2,c
    rlc a
    mov p0.3,c
    setb en
    acall delay_5ms
    clr en
    ret
;
;
ini_lcd:
    clr rs
    clr en
;
    mov a,#03h
    acall ini_out
;
    mov a,#03h
    acall ini_out
;
    mov a,#03h
    acall ini_out
;
    mov a,#02h
    acall ini_out
;
    mov a,#28h
    acall ini_out
;
    mov a,#0Ch
    acall ini_out
;
    mov a,#06h
    acall ini_out
;
    mov a,#06h
    acall ini_out
;
    mov a,#01h
    acall ini_out
;
    ret

Michael Karas