单片机直流电机调速系统设计

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LP2:

ACALL BUSY MOV A,#00H MOVC A,@A+DPTR MOV P1,A ACALL DATAS INC DPTR DJNZ R1,LP2 LP3:

CJNE R3,#00H,LP4 CJNE R4,#00H,LP4 SJMP LP3

LP4: MOV R7,#00H MOV R5,#09H ACALL BUSY MOV P1,#0C0H ACALL ENABLE MOV DPTR,#MMTAB ACALL BUSY LP5: MOV A,#00H MOVC A,@A+DPTR MOV P1,A INC DPTR ACALL DATAS ACALL BUSY DJNZ R5,LP5 MOV DPTR,#STAB MOV A,R2 MOV P1,A ACALL DATAS

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ACALL BUSY

MOV A,R3 MOVC A,@A+DPTR MOV P1,A ACALL DATAS ACALL BUSY

MOV A,R4 MOVC A,@A+DPTR MOV P1,A ACALL DATAS

LP8: CJNE R7,#00H,LP7 LJMP LP8 LP7: SJMP LP4

CHUSHI: ACALL BUSY MOV P1,#00000001B ACALL ENABLE ACALL BUSY

MOV P1,#00111000B ACALL ENABLE ACALL BUSY

MOV P1,#00001111B ACALL ENABLE ACALL BUSY

MOV P1,#00000110B ACALL ENABLE ACALL BUSY

MOV P1,#80H ACALL ENABLE

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RET

ENABLE: SETB E CLR RS CLR RW CLR E RET

DATAS: SETB E SETB RS CLR RW CLR E RET

BUSY: CLR E

MOV P1,#0FFH CLR RS SETB RW SETB E JB P1.7,BUSY RET ORG 2000H

DINGSHI: CPL P0.7

JNB P0.7,Z1 MOV A,#0FFH SUBB A,R0 MOV TH0,A SETB TR0 RETI

Z1: MOV TH0,R0

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SETB TR0 RETI

BUTTON: PUSH ACC CLR EX0 CLR EA INC R7 ; MOV A,#0FFH MOV P2,A MOV A,P2

JNB ACC.0,AA0 JNB ACC.1,KK0 JNB ACC.2,ZZ JNB ACC.3,FF JNB ACC.4,WW0 AJMP QQ

AA0: CJNE R0,#0FFH, AA1 AJMP QQ AA1: MOV A,R0 ADD A,#5 MOV R0,A AJMP QQ

KK0: CJNE R0,#00,MM AJMP QQ

MM: MOV A,R0 SUBB A,#5 MOV R0,A AJMP QQ

QQ: MOV A,R0 MOV B,#5 DIV AB

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