Qei

[chinusneha]

plz someone tell me.... how to use QEI..to count pulse.... what should be simple configuration... what should be the register value??

 

[blueroomelectronics]

What is QEI?

 

[picbits]

What is QEI?

Don't you know nothing

Elizabeth I of England - Wikipedia, the free encyclopedia

He wants to count the pulse of the old Queen of England - Elizabeth the 1st

Unfortunately she has been dead for over 400 years so there will be no pulse.

 

[ahydra]

Don't you know nothing

Elizabeth I of England - Wikipedia, the free encyclopedia

He wants to count the pulse of the old Queen of England - Elizabeth the 1st

Unfortunately she has been dead for over 400 years so there will be no pulse.

:-D

Unfortunately such a poor OP was bound to get a reply like that. Googling QEI didn't help much either, so could the OP'er please have another go?

ahydra

 

[blueroomelectronics]

I did find this.
**broken link removed**

 

[kjennejohn]

He's talking about Quadrature Encoder Input.
Have a look at this:
profmason.com Hardware solution to reading quadrature encoders

Later!
kenjj

 

[blueroomelectronics]

And how did you figure that out?

 

[Mickster]

Have a looky at the PIC18F2331/2431/4331/4431 Datasheet:

https://www.electro-tech-online.com/custompdfs/2009/02/39616C.pdf

Section 16.2

 

[blueroomelectronics]

And where in the original post does it say anything about a PIC or any MCU for that matter?

 

[kjennejohn]

Well, people have asked here and at other forums about QEI. Of course those OPs didn't say at first what the [!] QEI was, but eventually supplied the information. This OP then asks about register values. Et voilas, quad enclosure pulse detection and handling on a processor. I admit it's a stretch, but he hasn't said otherwise, so we just go with whats we gots.;-)
kenjj

 

[arhi]

**broken link removed**

 

[chinusneha]

ooo sorry i should have explained properly.... i have a optical encoder(HEDS9000) ... i have to count the position of the encoder using Quadrature Encoder Interface of Pic18f4331.... but i m unable to do that.. plz help

 

[kjennejohn]

Sigh. (rolls eyes) lol!
What else can you supply us with? Like:
1. What do you know of the hardware (encoder and PIC) you're designing in?
2. What programming language(s) do you know and are you using it(them)?
3. Is the encoder being turned by hand or is it attached to a motor?
4. What have you done already?
5. How much longer do you have before this school project is due?

That oughta do for starters,
kenjj

 

[JBrock]

How can one learn to design using a PIC? Bah!
You should be required to do it with flip-flops, gates, counters, and 7-segment displays!

 

[Mickster]

And where in the original post does it say anything about a PIC or any MCU for that matter?

It doesn't specifically, but Quadrature Encoder Interface, configuration & register kinda lend a hint toward what was eventually squeezed out of the OP.

plz someone tell me.... how to use QEI..to count pulse.... what should be simple configuration... what should be the register value??

........

ooo sorry i should have explained properly....

Yep, you should. Work through kjennejohn's list and in addition post what you have tried already.