Stepper motor control board
Monday, November 17th, 2008Program 1:-
It is advisable to begin with easy program. So in this program we shall see minimal functionality. Only first two switches and first three LEDs will be used. When you press one switch the motor will start rotating in clockwise direction and stops when completes one revolution. Pressing second switch will do the same job but in anticlockwise direction. The speed will be 10 RPM fixed. Motor runs in single coil excitation mode. First LED indicates key press event. Second blinks when motor rotates clockwise and third blinks when motor rotates anticlockwise.
Org 00h
mov r0,#01h ; initileze key count
mov p1,#0ffh ; P1 as input port
lop: mov a,p1
cjne a,#0ffh,jmp
ajmp lop ; loop until any key
; is pressed
jmp: clr p0.0 ; indicates keypress
loop: rrc a
jnc num ; get key no.
inc r0
sjmp loop
num: acall dely ; key debounce delay
setb p0.0
cjne r0,#01h,nxt ; for 1st key
acall clkwise ; rotate motor
sjmp over ; clock wise
nxt: cjne r0,#02h,over ; for 2nd key
acall aclkwise ; rotate anticlock
over: mov p2,#00h ; restore initial
mov p1,#0ffh ; data and
mov r0,#01h
sjmp lop ; jump to loop again
clkwise:
mov r1,#32h ; load count 50d
go: clr p0.1
mov p2,#01h ;give 4 pulses in loop
acall delay ; total 200 pulses
mov p2,#02h ; each coil energized
acall delay ; one by on in single
setb p0.1
mov p2,#04h ; coil excitation
acall delay ; 30 ms delay in betwn
mov p2,#08h ; means speed is
acall delay ; 10 RPM
djnz r1,go
ret
aclkwise:
mov r1,#32h
go1:clr p0.2
mov p2,#01h
acall delay
mov p2,#08h ; revert the pulse
acall delay ; sequence for
setb p0.2
mov p2,#04h ; anticlockwise
acall delay
mov p2,#02h
acall delay
djnz r1,go1
ret
delay:
mov r5,#1Eh ; load count 30
lop2: mov r6,#FAh ; give 1 ms delay
lop1:nop ; so it gives full
nop ; 30 ms delay
djnz r6,lop1
djnz r5,lop2
ret
dely:
mov r5,#0C8h ; load count 200
lop2: mov r6,#0FAh ; for 200ms delay
lop1: nop
nop
djnz r6,lop1
djnz r5,lop2
ret
end
Program 2:-
Here in this program we shall limit the motor to rotate only 7.2o in either direction when the key is pressed. When first key is pressed motor rotates in clockwise direction and when second is pressed anticlockwise direction. LED1 and LED2 indicate the clockwise and anticlockwise rotation.
Note: – In industries this is also known as “jogging” (jog control). This is done to check in which direction motor will start running.
Org 00h
mov r0,#01h ; initileze key count
mov p1,#0ffh ; P1 as input port
lop: mov a,p1
cjne a,#0ffh,jmp
ajmp lop ; loop until any key is pressed
jmp: clr p0.0 ; indicates keypress
loop: rrc a
jnc num ; get key no.
inc r0
sjmp loop
num: acall dely ; key debounce delay
setb p0.0
cjne r0,#01h,nxt ; for 1st key
acall clkwise ; rotate motor
sjmp over ; clock wise
nxt: cjne r0,#02h,over ; for 2nd key
acall aclkwise ; rotate anticlock
over: mov p2,#00h ; restore initial
mov p1,#0ffh ; data and
mov r0,#01h
sjmp lop ; jump to loop again
clkwise:
clr p0.1
mov p2,#01h ;give 4 pulses in loop
acall delay ; as 1.8o step resolution
mov p2,#02h ; total 7.2o rotation
acall delay ; in single coil
setb p0.1
mov p2,#04h ; excitation
acall delay ; 30 ms delay in betwn
mov p2,#08h ; means speed is
acall delay ; 10 RPM
ret
aclkwise:
clr p0.1
mov p2,#01h
acall delay
mov p2,#08h ; revert the pulse
acall delay ; sequence for
setb p0.1
mov p2,#04h ; anticlockwise
acall delay
mov p2,#02h
acall delay
ret
delay:
mov r5,#1Eh ; load count 30
lop2: mov r6,#FAh ; give 1 ms delay
lop1:nop ; so it gives full
nop ; 30 ms delay
djnz r6,lop1
djnz r5,lop2
ret
dely:
mov r5,#0C8h ; load count 200
lop2: mov r6,#0FAh ; for 200ms delay
lop1:nop
nop
djnz r6,lop1
djnz r5,lop2
ret
end
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December 18th, 2008 at 9:05 pm
da program gives syntax error when it is build in keil software.
its give error for cjne a,#0ffh,jmp. n
jmp clr p0.0……..
December 19th, 2008 at 9:39 am
Hi, here jmp is used as a label. Please change jmp to some other name. for example
cjne a,#0ffh,keypress
keypress: clr p0.0
December 20th, 2008 at 9:01 pm
it also gives error here
lop2:mov r6,#FAh ; give 1 ms delay :the error is undefined symbol(pass 2).
lop2: mov r6,#0FAh ; for 200ms delay : attempt to define already defined label.
lop1: nop attempt to define already defined label.
December 21st, 2008 at 11:44 pm
hi plz tell me abt these error in program
n i m using of Seiko epson EM-198.
will it operate with 7805.
December 26th, 2008 at 4:07 pm
Hi replace “dely” function as given below.
———————-
dely:
mov r5,#0C8h ; load count 200
lop22: mov r6,#0FAh ; for 200ms delay
lop11:nop
nop
djnz r6,lop11
djnz r5,lop22
ret
———————–
January 22nd, 2009 at 8:34 am
Nothing seems to be easier than seeing someone whom you can help but not helping.
I suggest we start giving it a try. Give love to the ones that need it.
God will appreciate it.
June 14th, 2009 at 4:33 am
I’m new here on the forum, found it by searching google. I look forward to chatting about various topics with all of you.
August 7th, 2009 at 1:05 pm
It is interesting. Can you mail me the full details of the circuits
February 11th, 2010 at 7:30 pm
Good stuff. I like this blog. I will subscribe to it.
March 3rd, 2010 at 5:14 pm
very good circuit … can you mail the full details and explainations of the circuit.
March 7th, 2010 at 1:32 am
can u tell me how to control pitman motor using at89s51 through h bridge give ,jut move the motor in forward and reverse direction ,and also give me a small cobe to drive the motor through h bridge using at89s51
March 25th, 2010 at 3:37 pm
sperb thank u
April 5th, 2010 at 10:20 pm
А телефон свой не оставите? Хотелось бы кое-что обсудить по теме.
May 21st, 2010 at 10:45 am
hey the project is nice but is there any problem in the programs is they give error
June 3rd, 2010 at 10:11 am
hi, please give the full information about the stepper motor
June 30th, 2010 at 5:42 pm
Nice project for learners. Is it available in kit form at a reasonable price?
Are the problems solved or still existing?
July 12th, 2010 at 10:30 am
Cheers, superb post.
July 29th, 2010 at 3:03 pm
Hi . . .can you mail me the full detail of the circuit diagram and the
program.
August 2nd, 2010 at 9:40 pm
AS THIS IS IN ASSEMBLY AND NOT IN ‘C’ DONT USE KEIL USE “ASEM” OR “RAISONANCE” INSTEAD.
August 26th, 2010 at 12:43 am
in new ustzz
January 22nd, 2011 at 6:28 am
Hi there, just wandered by. I have a Cincinnati 4g site. Amazing the amount of information on the web. Wasn’t what I was looking for, but great site. Take care.
March 22nd, 2011 at 6:18 pm
dear sir i want a program for only one directional revolution that means clockwise revolution..for fixed RPM
August 26th, 2011 at 9:46 am
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August 26th, 2011 at 4:20 pm
thanks for this information its very useful for my project
August 27th, 2011 at 6:06 pm
please send me more details about it…
it is very nice..
October 6th, 2011 at 7:20 pm
p.asm(5): error A9: SYNTAX ERROR
p.asm(7): error A5: ILLEGAL USE OF A RESERVED WORD
p.asm(7): error A9: SYNTAX ERROR
p.asm(7): error A9: SYNTAX ERROR
p.asm(8): error A8: ATTEMPT TO DEFINE AN ALREADY DEFINED LABEL
p.asm(22): error A45: UNDEFINED SYMBOL (PASS-2)
p.asm(24): error A8: ATTEMPT TO DEFINE AN ALREADY DEFINED LABEL
p.asm(37): error A45: UNDEFINED SYMBOL (PASS-2)
p.asm(57): error A45: UNDEFINED SYMBOL (PASS-2)
p.asm(58): error A8: ATTEMPT TO DEFINE AN ALREADY DEFINED LABEL
p.asm(65): error A8: ATTEMPT TO DEFINE AN ALREADY DEFINED LABEL
p.asm(66): error A8: ATTEMPT TO DEFINE AN ALREADY DEFINED LABEL
Target not created
this types of errors in program no 3 what can i do?
December 20th, 2011 at 2:17 am
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January 18th, 2012 at 12:16 pm
hey Ranjith,
I was looking at some of the work you have done, i am quiet amazed by your skill level. I would want to implement some of your work, if you would allow me to ofcourse. Would it be possible if i get you to email me to discuss this further? my email should appear to you. Please Email me as soon you get this .
thanks
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