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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

你的加速减速 最简单是用延时函数做 改变延时时间来控制脉冲发送