交通灯指挥系统的总体设计报告(15)

cmp bl,7 jnz CASE8 mov al,07H JMP SHW

CASE8: cmp bl,8 jnz CASE9 mov al,7FH JMP SHW

CASE9: cmp bl,9 jnz SHW

MOV AL,6FH

SHW:

MOV DX,D8279 OUT DX,AL RET

TRANS ENDP

DELAY1 PROC NEAR PUSH DX PUSH Ax jshi:

MOV DX,D8255B IN AL,DX

AND AL,00000001B CMP AL,SIGN1 JZ jshi

MOV SIGN1,AL

POP Ax POP DX

RET

DELAY1 ENDP

DELAY10 PROC NEAR PUSH AX PUSH CX

检测PB0 时钟信号，是否到一秒了 ;