完美版—单片机控制步进电机(4)

附录

附录一：源程序

ORG 0000H AJMP STOP ORG 1000H K1 EQU P3.2 K2 EQU P3.3 K3 EQU P3.4

STOP: MOV P2,#0FFH LOOP: JNB K1,Z_M2 JNB K2,F_M2 JNB K3,STOP1 JMP LOOP

STOP1: ACALL DELAY JNB K3,$ LCALL DELAY AJMP STOP

Z_M2: ACALL DELAY JNB K,$ ACALL DELAY AJMP Z_M

F_M2: ACALL DELAY JNB K2,$ ACALL DELAY AJMP F_M

;正转子程序

Z_M: MOV R0,#00H Z_M1: MOV A,R0 MOV DPTR,#TABLE MOVC A,@A+DPTR JZ Z_M MOV P2,A JNB K3,STOP1 JNB K2,F_M2 ACALL DELAY INC R0 AJMP Z_M1 RET

;步进电机停止

第 15 页 共 18 页

;反转子程序 F_M: MOV R0,#05H F_M1: MOV A,R0

MOV DPTR,#TABLE MOVC A,@A+DPTR JZ F_M MOV P2,A JNB K3,STOP1 JNB K1,Z_M2 ACALL DELAY INC R0 AJMP F_M1 RET

DELAY: MOV R6,#40 D1: MOV R7,#248 DJNZ R7,$ DJNZ R6,D1 RET

;控制码表 TABLE: DB 0FCH,0F9H,0F3H,0F6H DB 00H ;正转结束码 DB 0F7H,0F3H,0FBH,0F9H DB 0FDH,0FCH,0FEH,0F6H DB 00H ;反转结束码

END

;延时时间20ms

;正转 ;反转

附录二：改变电机转速的源程序

ORG 0000H AJMP MAIN ORG 1000H MAIN: ACALL Z_M ACALL F_M MOV R5,#250 ACALL DELAY JMP MAIN

；主程序

第 16 页 共 18 页

Z_M: ;正转子程序 MOV R0,#20 MOV A,#11001100B LOOP: MOV P0,A MOV R5,#50 ACALL DELAY RL A

DJNZ R0，LOOP RET

F_M: ;反转子程序 MOV R1,#200 MOV A,#00110011B LOOP1: MOV P0，A MOV R5,#5 ACALL DELAY RR A DJNZ R1,LOOP1 RET

DELAY: ;延时程序 DLY1: MOV R6,#100 MOV R7,#100 DJNZ R7,$ DJNZ R6,DLY2 DJNZ R5,DLY1 RET END

第 17 页 共 18 页