单片机进行脉宽调制(PWM) 直流电机调速测试程序

单片机 进行脉宽调制(PWM) 直流电机调速测试程序

  ;UNL2003提供电机驱动电流.(<=500MA/5V)
   ;使用六个按键实现六种不同速度


              DC   BIT  P1.0
              speed equ 20h
              org 000h
              jmp dc_MOTOR
              ORG 100H
   dc_MOTOR:

               MOV   a,p1
               MOV   speed,a      ;键盘去抖动
              lcall del
               MOV   a,p1
              cjne  a,speed,dc_MOTOR
              JB   P3.3,JUD_SPD5
               MOV   SPEED,#6      ;SW1
              JMP  PWM
JUD_SPD5:     JB   P3.2,JUD_SPD4
               MOV   SPEED,#5       ;SW2
              JMP  PWM
JUD_SPD4:     JB   P3.1,JUD_SPD3
               MOV   SPEED,#04       ;SW3
              JMP  PWM
JUD_SPD3:     JB   P3.0,JUD_SPD2
               MOV   SPEED,#03       ;SW4
              JMP  PWM
JUD_SPD2:     JB   P3.5,JUD_SPD1
               MOV   SPEED,#02       ;SW5
              JMP  PWM
JUD_SPD1:     JB   P3.6,JUD_SPD0
               MOV   SPEED,#01      ;SW6
              JMP  PWM
JUD_SPD0:      MOV   SPEED,#00

PWM:           MOV   R6,SPEED
               MOV   A,#06
              CLR  C
              SUBB  A,SPEED
               MOV   R5,A
              CLR  DC
WAIT1:        LCALL  DEL
              DJNZ   R5,WAIT1
              SETB  DC
WAIT2:        LCALL  DEL
              DJNZ   R5,WAIT2
              JMP   DC_MOTOR

Del:    MOV   r7,#0ffh
       djnz  r7,$
       ret

            END

本文关键字：单片机  直流电机  程序  51单片机，单片机-工控设备 - 51单片机