Stepper Motor Control 8255A-EEWORLD

Collect

Circuit connection (as shown in Figure 1):

Components (80c51 chip, 8255A chip, 74ls373 latch chip, l298 driver chip, three-phase six-wire stepper motor, several buttons, power supply)

Figure 1

Assembly source program:

ORG 0000H;

LJMP MAIN1;

ORG 0030H; (header file)

MAIN1:MOV DPTR,#0FF7FH; detect PA port status

MOV A,#91H;

MOVX @DPTR,A;

MAIN:MOV DPTR,#0FF7CH;

MOVX A,@DPTR;

CJNE A,#0FFH,L1;

LJMP MAIN;

L1:CJNE A,#0FEH,LOOP2;

LOOP1:MOV DPTR,#0FF7DH;Control the motor to rotate forward

MOV A,#01H;

MOVX @DPTR,A;

LCALL DELAY;

MOV DPTR,#0FF7CH;

MOVX A,@DPTR;

CJNE A,#0FFH,L2;

LJMP MAIN;

L2:CJNE A,#0FEH,LOOP2;

MOV DPTR,#0FF7DH;

MOV A,#02H;

MOVX @DPTR,A;

LCALL DELAY;

MOV DPTR,#0FF7CH;

MOVX A,@DPTR;

CJNE A,#0FFH,L3;

LJMP MAIN;

L3:CJNE A,#0FEH,LOOP2;

MOV DPTR,#0FF7DH;

MOV A,#04H;

MOVX @DPTR,A;

LCALL DELAY;

MOV DPTR,#0FF7CH;

MOVX A,@DPTR;

CJNE A,#0FFH,L4;

LJMP MAIN;

L4:CJNE A,#0FEH,LOOP2;

L8:LJMP LOOP1;

LOOP2:MOV DPTR,#0FF7DH; control the motor to reverse

MOV A,#01H;

MOVX @DPTR,A;

LCALL DELAY;

MOV DPTR,#0FF7CH;

MOVX A,@DPTR;

CJNE A,#0FFH,L5;

LJMP MAIN;

L5:CJNE A,#0FCH,LOOP1;

MOV DPTR,#0FF7DH;

MOV A,#04H;

MOVX @DPTR,A;

LCALL DELAY;

MOV DPTR,#0FF7CH;

MOVX A,@DPTR;

CJNE A,#0FFH,L6;

LJMP MAIN;

L6:CJNE A,#0FCH,LOOP1;

MOV DPTR,#0FF7DH;

MOV A,#02H;

MOVX @DPTR,A;

LCALL DELAY;

MOV DPTR,#0FF7CH;

MOVX A,@DPTR;

CJNE A,#0FFH,L7;

LJMP MAIN;

L7:CJNE A,#0FCH,L8;

LJMP LOOP2;

DELAY:MOV R5,#0H; Delay subroutine

K1:MOV R6,#02H;

K2:MOV R7,#81H;

K3:NOP;

DJNZ R7,K3;

DJNZ R6,K2;

DJNZ R5,K1;

RET;

END;

Keywords：8255A Reference address：Stepper Motor Control 8255A

Previous article：Smart car production - remote control car (assembly version)
Next article：51 single-chip programmable chip 8255 LED light control

Popular Resources
Popular amplifiers

Recommended Content

Latest Microcontroller Articles

Learn ARM development(16)
There are many things to learn about ARM, and interrupts are definitely something that needs to be learned. Since the CPU introduced interrupts, it has truly entered the multi-tasking system and greatly improved work efficiency. ...
Learn ARM development(17)
Because all embedded systems use interrupts, how does my S3C44B0 interrupt the process? Then I need to understand the whole process. To understand it in depth, the best way is to write a program ...
Learn ARM development(18)
Last time, we have learned about the interrupt handling process of ARM and how to set the interrupt function. So, does it work like this? The answer is no. Because S3C44B0 has several registers that control ...
Embedded system debugging simulation tool
After the embedded hardware system is designed, it needs to be debugged. Whether it is hardware debugging, software debugging or program solidification, debugging simulation tools are needed. ...
A small question that has been bothering me recently has finally been solved~~
Recently, I have not been able to understand the concept of drivers very well. Sometimes I can get a feel for it by combining some USB examples written by others, but because the ARM system does not directly explain the pins like the microcontroller ...
Learn ARM development (1)
Learn ARM development (2)
Learn ARM development (4)
Learn ARM development (6)

He Limin Column Microcontroller and Embedded Systems Bible

Professor at Beihang University, dedicated to promoting microcontrollers and embedded systems for over 20 years.

MoreSelected Circuit Diagrams

Change More Related Popular Components

MorePopular Articles

MoreDaily News

Guess you like