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原理图在 http://hi.baidu.com/%CD%F5%C1%BC%C5%DC/blog/item/5d4e2002f97282027aec2c60.html
这个程序中为何没有写T1(P3.5)中断的入口地址
MOV 20H,#00H ;20H单元置初值，电机正转位置指针
MOV 21H,#00H ;21H单元置初值，电机反转位置指针
MOV P1,#0C0H ;P1口置初值，防止电机上电短路
MOV TMOD,#60H ;T1计数器置初值,开中断
MOV TL1,#0FFH
MOV TH1,#0FFH
SETB ET1
SETB EA
SETB TR1
SJMP $
;***********计数器1中断程序************
IT1P: JB P3.7,FAN ;电机正、反转指针
;*************电机正转*****************
JB 00H,LOOP0
JB 01H,LOOP1
JB 02H,LOOP2
JB 03H,LOOP3
JB 04H,LOOP4
JB 05H,LOOP5
JB 06H,LOOP6
JB 07H,LOOP7
LOOP0: MOV P1,#0D0H
MOV 20H,#02H
MOV 21H,#40H
AJMP QUIT
LOOP1: MOV P1,#090H
MOV 20H,#04H
MOV 21H,#20H
AJMP QUIT
LOOP2: MOV P1,#0B0H
MOV 20H,#08H
MOV 21H,#10H
AJMP QUIT
LOOP3: MOV P1,#030H
MOV 20H,#10H
MOV 21H,#08H
AJMP QUIT
LOOP4: MOV P1,#070H
MOV 20H,#20H
MOV 21H,#04H
AJMP QUIT
LOOP5: MOV P1,#060H
MOV 20H,#40H
MOV 21H,#02H
AJMP QUIT
LOOP6: MOV P1,#0E0H
MOV 20H,#80H
MOV 21H,#01H
AJMP QUIT
LOOP7: MOV P1,#0C0H
MOV 20H,#01H
MOV 21H,#80H
AJMP QUIT
;***************电机反转*****************
FAN: JB 08H,LOOQ0
JB 09H,LOOQ1
JB 0AH,LOOQ2
JB 0BH,LOOQ3
JB 0CH,LOOQ4
JB 0DH,LOOQ5
JB 0EH,LOOQ6
JB 0FH,LOOQ7
LOOQ0: MOV P1,#0A0H
MOV 21H,#02H
MOV 20H,#40H
AJMP QUIT
LOOQ1: MOV P1,#0E0H
MOV 21H,#04H
MOV 20H,#20H
AJMP QUIT
LOOQ2: MOV P1,#0C0H
MOV 21H,#08H
MOV 20H,#10H
AJMP QUIT
LOOQ3: MOV P1,#0D0H
MOV 21H,#10H
MOV 20H,#08H
AJMP QUIT
LOOQ4: MOV P1,#050H
MOV 21H,#20H
MOV 20H,#04H
AJMP QUIT
LOOQ5: MOV P1,#070H
MOV 21H,#40H
MOV 20H,#02H
AJMP QUIT
LOOQ6: MOV P1,#030H
MOV 21H,#80H
MOV 20H,#01H
AJMP QUIT
LOOQ7: MOV P1,#0B0H
MOV 21H,#01H
MOV 20H,#80H
QUIT: RETI
END |
阿莫论坛20周年了！感谢大家的支持与爱护！！
知道什么是神吗？其实神本来也是人，只不过神做了人做不到的事情 所以才成了神。 （头文字D, 杜汶泽）
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发表于 2010-10-6 21:31:44
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