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What is the assembly language program for 8085 interfacing of stepper motor to rotate it clockwise and anticlockwise direction using 8255?
Wiki User
∙ 9y ago
As port A is used as an output port, control word for 8255 is 80H.
Stepper Motor Control Program:
6000H Excite code DB 03H, 06H,09H, OCH : This is the code sequence for clockwise rotation
Subroutine to rotate a stepper motor clockwise by 360° - Set the counts:
- MVI C, 32H : Set repetition count to 50ıο
- START: MVI B, 04H : Counts excitation sequence
- LXI H, 6000H : Initialize pointer
- BACK1: MOV A, M : Get the Excite code
- OUT PORTA : Send Excite code
- CALL DELAY : Wait
- INX H : Increment pointer
- DCR B : Repeat 4 times
- JNZ BACK l
Delay Subroutine:
- Delay: LXI D, Count
- Back: DCX D
- MOV A, D
- ORA E
- JNZ Back
- RET
Wiki User
∙ 12y ago
Wiki User
∙ 9y agoWrite an ALP in 8086 to rotate the stepper motor 45 degree in clockwise direction in half step
mode and 90 degree in anticlockwise direction in full step mode using 8255.
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