This is simple ASM code to rotate stepper motor in clockwise motion. You have to attach ULN2003 IC to microcontroller and output of ULN2003 should be attached to Stepper motor. I tested this code with four coil stepper motor. You can create HEX file from this code by compiling in the Keil2 or 3 version with Target device p89V51RDxx microcontroller. There are other code for ADC and LED Interfacing to the 8051 microcontroller.

SERIAL COMMUNICATION\C PROGRAM SERIAL COMMUNICATION\ABSTRACT.TXT
....................\..............................\ASAMPLE.BAT
....................\..............................\Asample.fdb
....................\..............................\Asample.hex
....................\..............................\Asample.M51
....................\..............................\ASAMPLE.Opt
....................\..............................\Asample.plg
....................\..............................\ASAMPLE.Uv2
....................\..............................\ASAMPLE1.A51
....................\..............................\ASAMPLE1.LST
....................\..............................\ASAMPLE1.M51
....................\..............................\ASAMPLE1.OBJ
....................\..............................\ASAMPLE2.A51
....................\..............................\ASAMPLE2.LST
....................\..............................\ASAMPLE2.OBJ
....................\..............................\ASAMPLE3.A51
....................\..............................\ASAMPLE3.LST
....................\..............................\ASAMPLE3.OBJ
....................\..............................\ASAMPLE_Opt.Bak
....................\..............................\ASAMPLE_Uv2.Bak
....................\..............................\AXSAMPLE.BAT
....................\MATRIX KEYTEST IN SERIAL COMMUNICATION\KEY.ASM
....................\......................................\KEY.HEX
....................\......................................\KEY.LST
....................\SERIAL COMMUNICATION TEST\SERIAL.ASM
....................\.........................\SERIAL.fdb
....................\.........................\SERIAL.HEX
....................\.........................\SERIAL.LST
stepper_motor.asm
test1.hex
stepper_motor.rar
7 SEGMENT TEST\7 SEG TEST MULTIPLEXED\7segtest.asm
..............\......................\8051.hex
..............\MATRIX KEY TEST IN 7SEGMENT DISPLAY\8051.hex
..............\...................................\MATRIX.ASM
..............\SEGMENT TEST\ABSTRACT.TXT
..............\............\BLINKY
..............\............\BLINKY.C
..............\............\BLINKY.fdb
..............\............\BLINKY.hex
..............\............\BLINKY.lnp
..............\............\BLINKY.LST
..............\............\BLINKY.M51
..............\............\BLINKY.OBJ
..............\............\BLINKY.Opt
..............\............\BLINKY.plg
..............\............\BLINKY.Uv2
..............\............\BLINKY_Opt.Bak
..............\............\BLINKY_Uv2.Bak
ADC TEST\8051.hex
........\adc.asm
........\adc.LST
DIP SW\8051.HEX
......\PUSHBUTTON TEST.C
LCD TEST\LCDtest.asm
........\LCDtest.hex
.ED TEST\8051.hex
........\ledtest.asm
PUSH BUTTON\8051.hex
...........\PUSHBUTTON TEST.C
SERIAL COMMUNICATION\C PROGRAM SERIAL COMMUNICATION
....................\MATRIX KEYTEST IN SERIAL COMMUNICATION
....................\SERIAL COMMUNICATION TEST
7 SEGMENT TEST\7 SEG TEST MULTIPLEXED
..............\MATRIX KEY TEST IN 7SEGMENT DISPLAY
..............\SEGMENT TEST
SERIAL COMMUNICATION
7 SEGMENT TEST
ADC TEST
DIP SW
LCD TEST
LED TEST
PUSH BUTTON

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