?? led.txt
字號:
;點陣式LED實驗:
;實驗連線:P1.0------CIN ; P1.1-----SIN;CS0-----YC2
CLK EQU P1.0
DINA EQU P1.1
MIAN: MOV SP,#60H
CLR C
SEND1: MOV R0,#080H
MOV DPTR,#CODEd1
SEND: CLR A
MOVC A,@A+DPTR
push dph
push dpl
mov dptr,#0a000h
MOVX @dptr,a
MOV A,R0
ACALL sendto
pop dpl
pop dph
INC DPTR
MOV A,R0
RRC A
MOV R0,A
LCALL DELAY
JB ACC.0, SEND1
SJMP SEND
DELAY: MOV R7,#01
DELAY0: MOV R4,#40
DELAY1: MOV R3,#28
DJNZ R3,$
DJNZ R4,DELAY1
DJNZ R7,DELAY0
RET
CODEd1: DB 03eh,063h,003h,07Eh,060h,060h,07fh,000H ;"5
sendto:
PUSH ACC
CLR CLK
SENDTIME:
MOV R3,#08H
MOV A,R0
clr c
SENDCY:
RLC A
MOV DINA,C
SETB CLK
CLR CLK
DJNZ R3,SENDCY
POP ACC
RET
end
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