#include<REG51F380.h>

LED     EQU  P2.7


QTUM    DATA 30H

BYTE0   DATA 31H
BYTE1   DATA 32H
BYTE2   DATA 33H
BYTE3   DATA 34H

CSEG AT 0H
    JMP INIT

CSEG AT 50H

INIT:
    INIT_PCA:   MOV   XBR1, #40h
                MOV   PCA0MD, #0
    INIT_MEM:   MOV   SP, #5FH
                MOV   CLKSEL, #3
                MOV   BYTE0, #255
                MOV   BYTE1, #255
                MOV   BYTE2, #255
                MOV   BYTE3, #1

MAIN:   ACALL DELAY3
        CPL   LED
        JMP   MAIN


DELAY3:     MOV   A, BYTE3      ; 2
            CPL   A             ; 1
            INC   A             ; 1
    CYCLE3: PUSH  ACC           ; 2
            ACALL DELAY2        ; 4
            POP   ACC           ; 2
            ADDC  A, #1         ; 2
            JNC   CYCLE3        ; 2/3
            CLR   C             ; 1
            RET                 ; 6

DELAY2:     MOV   A, BYTE2      ; 2
            CPL   A             ; 1
            INC   A             ; 1
    CYCLE2: PUSH  ACC           ; 2
            ACALL DELAY1        ; 4
            POP   ACC           ; 2
            ADDC  A, #1         ; 2
            JNC   CYCLE2        ; 2/3
            CLR   C             ; 1
            RET                 ; 6

DELAY1:     MOV   A, BYTE1      ; 2
            CPL   A             ; 1
            INC   A             ; 1
    CYCLE1: PUSH  ACC           ; 2
            ACALL DELAY0        ; 4
            POP   ACC           ; 2
            ADDC  A, #1         ; 2
            JNC   CYCLE1        ; 2/3
            CLR   C             ; 1
            RET                 ; 6

DELAY0:     MOV   A, BYTE0      ; 2
            CPL   A             ; 1
            INC   A             ; 1
    CYCLE0: ADDC  A, #1         ; 2
            JNC   CYCLE0        ; 2/3
            CLR   C             ; 1
            RET                 ; 6


END