MOTOR LOGIC IN PIC16f877 - Electronic Circuits Projects Diagrams Free

flemmard · 8th September 2007, 04:11 AM

Hi,
I wish to drive the motor clockwise for 5 secs and halt for 5 secs and then continue running in ANTI-clockwise for 5 seconds....the cycle should continue this way.How do i do the delay in PIC 16f877 of MICROTECH? Any built-in function or sample code?

Thanks

**Nigel Goodwin** · 8th September 2007, 09:11 AM

If you go to the PICList there is a delay code generator, which will generate assembler code for you simply by specifying the delay required and the clock speed.

simrantogether · 8th September 2007, 09:42 AM

Quote:

Hi,
I wish to drive the motor clockwise for 5 secs and halt for 5 secs and then continue running in ANTI-clockwise for 5 seconds....the cycle should continue this way.

well, very simple.. go to this site.. and enter values..

the code will come automatically..

http://www.piclist.com/techref/picli...egen/delay.htm

Quote:

How do i do the delay in PIC 16f877 of MICROTECH?

PIC is by microchip' ...

Regards,

Simran..

flemmard · 8th September 2007, 11:39 AM

Quote:

Originally Posted by simrantogether

well, very simple.. go to this site.. and enter values..

the code will come automatically..

http://www.piclist.com/techref/picli...egen/delay.htm

PIC is by microchip' ...

Regards,

Simran..

Thanks Simran ! Your name rocks !

flemmard · 8th September 2007, 11:41 AM

Quote:

Originally Posted by simrantogether

well, very simple.. go to this site.. and enter values..

the code will come automatically..

http://www.piclist.com/techref/picli...egen/delay.htm

PIC is by microchip' ...

Regards,

Simran..

Hi, I'm here once again.Is it possible to get the code in C.I'm using Hi-tech PIC C compiler.
Thanks!

simrantogether · 8th September 2007, 11:49 AM

In c, it is definitely much easier..

Find out a function .. or make a function that generate a delay of 1 micro second..

hence if you need a 5000 micro second delay.. then just put the value 5000 in brackets of function call..

The function of delay of one microsecond .. you can have it from Sir Nigel..

or, develop by yourself.. or net.. or book..

or give me some time.. i'll try..

Regards,

Simran..

flemmard · 8th September 2007, 11:53 AM

Quote:

Originally Posted by simrantogether

In c, it is definitely much easier..

Find out a function .. or make a function that generate a delay of 1 micro second..

hence if you need a 5000 micro second delay.. then just put the value 5000 in brackets of function call..

The function of delay of one microsecond .. you can have it from Sir Nigel..

or, develop by yourself.. or net.. or book..

or give me some time.. i'll try..

Regards,

Simran..

Thank you very much.I'm trying to get the function.Meanwhile,if you get any, please post it here.

Btw, your favourite actress is Simran?

simrantogether · 8th September 2007, 11:55 AM

You'll also have to mention the value of crystal you are using for the project..

Regards,

Simran..

simrantogether · 8th September 2007, 11:57 AM

Quote:

Originally Posted by flemmard

Btw, your favourite actress is Simran

My name is Simran..

Simran Singh..

Regards,

Simran..

flemmard · 8th September 2007, 12:01 PM

Quote:

Originally Posted by simrantogether

You'll also have to mention the value of crystal you are using for the project..

Regards,

Simran..

This is just a home project.I'm planning to do some travellator kinda stuff.I really don't know from technical aspect as I'm newbie here.I'm using a small motor for this.Kindly advice !

simrantogether · 8th September 2007, 01:47 PM

Which motor you are using..?

Stepper motor or DC motor.. ?

Regards,

Simran..

**Nigel Goodwin** · 8th September 2007, 02:22 PM

Quote:

Originally Posted by simrantogether

In c, it is definitely much easier..

It's really dead simple in assembler as well, just load a register with the delay you want and call a delay routine that number of times - most of my tutorials do just that.

Quote:

Find out a function .. or make a function that generate a delay of 1 micro second..

Not in C you don't, at least not with a 4MHz clock - and even in assembler you don't use a function for that, just a single NOP at 4MHz for a 1uS delay.

Quote:

hence if you need a 5000 micro second delay.. then just put the value 5000 in brackets of function call..

The function of delay of one microsecond .. you can have it from Sir Nigel..

'NOP' - there you go!

Or for a 20MHz clock?

'NOP
NOP
NOP
NOP
NOP'

flemmard · 8th September 2007, 03:51 PM

Quote:

Originally Posted by simrantogether

Which motor you are using..?

Stepper motor or DC motor.. ?

Regards,

Simran..

I'm using DC motor. Btw, heard stepper motor is much costlier than DC...

Thanks !

flemmard · 9th September 2007, 05:44 AM

Quote:

Originally Posted by simrantogether

You'll also have to mention the value of crystal you are using for the project..

Regards,

Simran..

20MHz for my DC motor

simrantogether · 10th September 2007, 06:31 AM

Quote:

Originally Posted by Nigel Goodwin

'NOP' - there you go!

Or for a 20MHz clock?

'NOP
NOP
NOP
NOP
NOP'

and Sir Nigel.. when we want a delay for 5000 milliseconds.. then?

we do have to add nested loops...

sometimes three.. if it is 8 bit rom ..

hence it is complicated than C language.. atleast for the beginner..

Regards,

Simran..

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8th September 2007, 04:11 AM	(permalink)
flemmard	MOTOR LOGIC IN PIC16f877 Hi, I wish to drive the motor clockwise for 5 secs and halt for 5 secs and then continue running in ANTI-clockwise for 5 seconds....the cycle should continue this way.How do i do the delay in PIC 16f877 of MICROTECH? Any built-in function or sample code? Thanks

8th September 2007, 09:11 AM	(permalink)
Nigel Goodwin	If you go to the PICList there is a delay code generator, which will generate assembler code for you simply by specifying the delay required and the clock speed. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

8th September 2007, 11:49 AM	(permalink)
simrantogether	in c... In c, it is definitely much easier.. Find out a function .. or make a function that generate a delay of 1 micro second.. hence if you need a 5000 micro second delay.. then just put the value 5000 in brackets of function call.. The function of delay of one microsecond .. you can have it from Sir Nigel.. or, develop by yourself.. or net.. or book.. or give me some time.. i'll try.. Regards, Simran.. __________________ Simran.. 8051 Specialist..

8th September 2007, 11:55 AM	(permalink)
simrantogether	well.. You'll also have to mention the value of crystal you are using for the project.. Regards, Simran.. __________________ Simran.. 8051 Specialist..

8th September 2007, 01:47 PM	(permalink)
simrantogether	listen.. Which motor you are using..? Stepper motor or DC motor.. ? Regards, Simran.. __________________ Simran.. 8051 Specialist..