[B原创] 我的第一个51开发板作品——B1

CHNUM EQU 13H

ORG 0000H

AJMP START

; START PROGRAM

START: MOV R0, #CHNUM

DISPLAY: MOV P1, #0FFH

LCALL DLSHORT

MOV DPTR, #TAB

MOV A, #CHNUM

SUBB A, R0

MOVC A, @A+DPTR

MOV P1, A

LCALL DLLONG

DJNZ R0, DISPLAY

LCALL DLLONG

AJMP START

; SHORT DELAY

DLSHORT: MOV R6, #0FFH

DL1: MOV R7, #0FFH

DL2: DJNZ R7, DL2

DJNZ R6, DL1

RET

; LONG DELAY

DLLONG: MOV R5, #0AH

DDL0: MOV R6, #0FFH

DDL1: MOV R7, #0FFH

DDL2: DJNZ R7, DDL2

DJNZ R6, DDL1

DJNZ R5, DDL0

RET

; DISPLAY DATA

TAB: DB 92H, 89H, 0A1H, 0A1H, 91H, 0BDH, 0CBH, 88H, 89H, 0C2H, 91H, 88H, 89H, 80H, 0C2H, 0A1H, 0A0H, 0A0H, 92H

END

FOR SUNNY ！ ^_^