Thierry wrote:
> Thanks to you all for you answers. (it is a study project.).actually i
> was looking for a reference on "oversampling and counter
> algorithm". Obviously, i googled for before posting in here. anyway,
> i'll study the reference given above, thanks for your help

Did you google for 'manchester encoding' or 'manchester decoder'?

I got more than a quarter million responses, many to the
point on the very first pages.

Do you have a clock already synchronized to the basic data rate
when you get the data in?

-- 

Tauno Voipio
tauno voipio (at) iki fi

Thierry skrev 2010-08-20 13:06:
> Hi,
> I have to implement a receiver/decoder for a typical manchester
> encoded signal. I have to use a mircocontroller for this. someone
> tipped me on using what he called "oversampling and counter
> algorithm". but i can't find any useful reference. any help please.
> cheers
> PS. I have no background on communication

The later Atmel 32 bit micros have manchester encoder/decoder
implemented in the USART.


-- 
Best Regards
Ulf Samuelsson
These are my own personal opinions, which may
or may not be shared by my employer Atmel Nordic AB

Thanks to you all for you answers. (it is a study project.).actually i
was looking for a reference on "oversampling and counter
algorithm". Obviously, i googled for before posting in here. anyway,
i'll study the reference given above, thanks for your help

On 08/20/2010 04:06 AM, Thierry wrote:
> Hi,
> I have to implement a receiver/decoder for a typical manchester
> encoded signal. I have to use a mircocontroller for this. someone
> tipped me on using what he called "oversampling and counter
> algorithm". but i can't find any useful reference. any help please.
> cheers

If it's low noise, low speed, and low clock jitter then there's a 
bazillion solutions out there and the question boils down to which one 
you can get done soonest and that tickles your fancy.

As each one of those 'lows' are raised to 'middlin' or 'high' then the 
problem gets progressively harder.  You haven't said, so there's not 
much guidance to give beyond what you've gotten so far.

-- 

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" was written for you.
See details at http://www.wescottdesign.com/actfes/actfes.html

On 20 Ago, 13:06, Thierry <thierrybi...@googlemail.com> wrote:
> Hi,
> I have to implement a receiver/decoder for a typical manchester
> encoded signal. I have to use a mircocontroller for this. someone
> tipped me on using what he called "oversampling and counter
> algorithm". but i can't find any useful reference. any help please.
> cheers
> PS. I have no background on communication

AN3015 of Freescale. Should give you some hints.

Anyway learn to use google, in the first 10 result of "manchester
decoding" search string there should be enough meterial to solve the
problem.

Bye Jack

On Aug 20, 1:06&#4294967295;pm, Thierry <thierrybi...@googlemail.com> wrote:
> Hi,
> I have to implement a receiver/decoder for a typical manchester
> encoded signal. I have to use a mircocontroller for this. someone
> tipped me on using what he called "oversampling and counter
> algorithm". but i can't find any useful reference. any help please.
> cheers
> PS. I have no background on communication

There's a nice flowchart and timing diagrams for Machester coding in
the Telefunken (now Atmel) U2270 data sheet .. or was it an
application note?
Anyway, find all you can on the Atmel site on that IC and that should
get you going.

Viktor

On 20.8.10 2:06 , Thierry wrote:
> Hi,
> I have to implement a receiver/decoder for a typical manchester
> encoded signal. I have to use a mircocontroller for this. someone
> tipped me on using what he called "oversampling and counter
> algorithm". but i can't find any useful reference. any help please.
> cheers
> PS. I have no background on communication

Honework or study project?

-- 

Tauno Voipio

Hi,
I have to implement a receiver/decoder for a typical manchester
encoded signal. I have to use a mircocontroller for this. someone
tipped me on using what he called "oversampling and counter
algorithm". but i can't find any useful reference. any help please.
cheers
PS. I have no background on communication