實現應用單片機最小應用系統實現流水燈顯示，具體通過控制從P0口開始到P1口、P2口、P3口實現亮兩盞燈的流水燈控制。
以下是我寫的程序，有很多錯誤，自己的知識很少，不會改，希望大神幫幫忙，感激不盡�。。�
LED_PORT0 EUQ P0
LED_PORT1 EUQ P1
LED_PORT2 EUQ P2
LED_PORT3 EUQ P3
ORG 0000H
LJMP MAIN
ORG 0100H
MAIN:
MOV R0, #08H
MOV R1, #08H
MOV R2, #08H
MOV R3, #08H
MOV LED_PORT0, #00H
MOV LED_PORT1, #00H
MOV LED_PORT2, #00H
MOV LED_PORT3, #00H
MOV A, #01H
AA: MOV LED_PORT1, A
LCALL DELAY
RL A
DJNZ R0, AA
MOV A, #01H
BB: MOV LED_PORT3 A
LCALL DELAY
RL A
DJNZ R1, BB
MOV A, #01H
CC: MOV LED_PORT2 A
LCALL DELAY
RL A
DJNZ R2, C
MOV A, #01H
DD: MOV LED_PORT0 A
LCALL DELAY
RL A
DJNZ R3, D
RET
END
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