Question

Write an ALP to control the different direction of rotation of stepper motor​

​

     Stepper motor has the following specifications​

• Stepper motor has 4 windings ​

• Speed =12 rpm​

• No of teeth =200 ​

Answer 1

Answer : Given data

* The stepper motor is interfaced with t port C of 8255 Programmable peripheral interface (PPI) and through 8051 .

* Interfacing diagram of Stepper motor through transistor amplifiers and 8051 Microcontroller

* Since,RPM = 12,i.e 12x 360 = 4320 degree of rotation /min

for 200 steps =360⁰

1 step = 360/200 = 1.8⁰

For four data one time = 7.2⁰

^{repeat this data 600 times will produce 12 RPM.}

^{R3 register will contain 600 decimal = 258 H; i.e R3 = 258H}

* ASL code for Rotating the stepper motor in a clock wise direction

      8009                MOV R3,#258;                                            (R3) = 258H

     8023                                                   DJNZ R3,REPEAT;                    Decrement R3 and jump to REPEAT if R3≠0

* ASL code for Rotating the stepper motor in anticlock wise direction

8009                 MOV R3,#258;                      (R3) = 258H,

8023                      DJNZ R3, REPEAT;                    Decrement R3 and jump to REPEAT if R3≠0

8025                                                      LCALL 0003;                                 End of the program

_______THE END_____________