AVR-Chat

Hello, I need to get a good C tutorial for the AVR.  I have been programming for the bs2.. and would now like to move over to the AVR and C.

Is there any good online resources to learn C for the AVR?

thanks!
Lee

Lee I believe you have had no response,

I think you might not have to learn anything new on C,
if you are up to speed on C as a programming language, all you have to learn is how to interface C with
the microprocessor, and learn what header files you need to make your program to work.


I hope you are not confused here what I have just said.


From Eric

----- Original Message -----
From: <fredit@charter.net>
To: <AVR-Chat@yahoogroups.com>
Sent: Thursday, February 03, 2005 6:48 AM
Subject: [AVR-Chat] Best C tutorial for AVR



Hello, I need to get a good C tutorial for the AVR.  I have been programming for the bs2.. and would now
like to move over to the AVR and C.

Is there any good online resources to learn C for the AVR?

thanks!
Lee




Yahoo! Groups Links

> Is there any good online resources to learn C for the AVR?

Not sure about best but here is one I read a while ago:
http://www.SmileyMicros.com/

Alex

On Sat, 05 Feb 2005 01:13:51 +1300 you wrote:

The book at 
http://www.prllc.com/productcart/pc/viewPrd.asp?idcategory=6&idproduct=12
gives a good description of using C on AVRs with lots of good example code.

>Lee I believe you have had no response,
>
>I think you might not have to learn anything new on C,
>if you are up to speed on C as a programming language, all you have to learn is how to interface C with
>the microprocessor, and learn what header files you need to make your program to work.
>
>
>I hope you are not confused here what I have just said.
>
>
>From Eric
>
>
>
>----- Original Message -----
>From: <fredit@charter.net>
>To: <AVR-Chat@yahoogroups.com>
>Sent: Thursday, February 03, 2005 6:48 AM
>Subject: [AVR-Chat] Best C tutorial for AVR
>
>
>
>Hello, I need to get a good C tutorial for the AVR.  I have been programming for the bs2.. and would now
>like to move over to the AVR and C.
>
>Is there any good online resources to learn C for the AVR?
>
>thanks!
>Lee
>
>
>
>
>Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
> 
>Yahoo! Groups Links
>
>
>
> 
>
>
>

--
Ralph Hilton
http://www.ralphhilton.org
C-Meter: http://www.cmeter.org
FZAOINT http://www.fzaoint.net

I am sure if you knew you C
you would not have slash out with $67.95 (US) I take it.


do you own this book Ralph?



From Eric

----- Original Message -----
From: "Ralph Hilton" <ralph@ralphhilton.org>
To: <AVR-Chat@yahoogroups.com>
Sent: Saturday, February 05, 2005 9:28 AM
Subject: Re: [AVR-Chat] Best C tutorial for AVR



On Sat, 05 Feb 2005 01:13:51 +1300 you wrote:

The book at
http://www.prllc.com/productcart/pc/viewPrd.asp?idcategory=6&idproduct=12
gives a good description of using C on AVRs with lots of good example code.

>Lee I believe you have had no response,
>
>I think you might not have to learn anything new on C,
>if you are up to speed on C as a programming language, all you have to learn is how to interface C with
>the microprocessor, and learn what header files you need to make your program to work.
>
>
>I hope you are not confused here what I have just said.
>
>
>From Eric
>
>
>
>----- Original Message -----
>From: <fredit@charter.net>
>To: <AVR-Chat@yahoogroups.com>
>Sent: Thursday, February 03, 2005 6:48 AM
>Subject: [AVR-Chat] Best C tutorial for AVR
>
>
>
>Hello, I need to get a good C tutorial for the AVR.  I have been programming for the bs2.. and would now
>like to move over to the AVR and C.
>
>Is there any good online resources to learn C for the AVR?
>
>thanks!
>Lee
>
>
>
>
>Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>
>
>
>

--
Ralph Hilton
http://www.ralphhilton.org
C-Meter: http://www.cmeter.org
FZAOINT http://www.fzaoint.net



Yahoo! Groups Links

On Sat, 05 Feb 2005 09:47:24 +1300 Eric wrote:

>
>I am sure if you knew you C
>you would not have slash out with $67.95 (US) I take it.
>
>
>do you own this book Ralph?

Yes, I bought a copy when I started with AVRs. I'd used C++ quite a bit before
but there are aspects of C that one doesn't get into using something like C++
Builder for windows apps. Only the first chapter covers an intro to C and that
is worth reading as it presents the language with an embedded processing
orientation. I felt the material was well presented in a gradient that was very
workable for me.

I would say that its time they updated in for current processors and some
changes in CVAVR such as pointer syntax.

I had quite a heavy learning curve and brainache switching to thinking with
microprocessors. One of the reasons I bought CVAVR was that an easy to read and
understandable book was available. Another reason was that the CVAVR list seemed
very friendly to newcomers and helpful. Given that I don't have a large budget
available I considered using Bascom but was put off by the brusque and
occasionally rather unpleasant attitudes on the support list. At that time I was
only considering developing one application. Now its become somewhat addictive
and I'm glad I got that C compiler as Basic is very restrictive. Pavel was even
good enough to give me free updates for life after I ported the Megaload
bootloader to CVAVR and put up a webpage on it http://cmeter.org/CVmegaload/

If someone wants a copy of the book I would search around for the best price. It
was cheaper for me to get it sent from the UK for GBP33 than locally.

>
>From Eric
>
>----- Original Message -----
>From: "Ralph Hilton" <ralph@ralphhilton.org>
>To: <AVR-Chat@yahoogroups.com>
>Sent: Saturday, February 05, 2005 9:28 AM
>Subject: Re: [AVR-Chat] Best C tutorial for AVR
>
>On Sat, 05 Feb 2005 01:13:51 +1300 you wrote:
>
>The book at
>http://www.prllc.com/productcart/pc/viewPrd.asp?idcategory=6&idproduct=12
>gives a good description of using C on AVRs with lots of good example code.
>
--
Ralph Hilton
http://www.ralphhilton.org
C-Meter: http://www.cmeter.org
FZAOINT http://www.fzaoint.net

Thanks you see the list of contents, like the other posting (book)
but also you can download the first 2 chapters (in *.pdf) free.





From Eric

----- Original Message ----- 
From: "Alex Shepherd" <maillists@ajsystems.co.nz>
To: <AVR-Chat@yahoogroups.com>
Sent: Saturday, February 05, 2005 8:27 AM
Subject: RE: [AVR-Chat] Best C tutorial for AVR



> Is there any good online resources to learn C for the AVR?

Not sure about best but here is one I read a while ago:
http://www.SmileyMicros.com/

Alex




 
Yahoo! Groups Links

--- In AVR-Chat@yahoogroups.com, Ralph Hilton <ralph@r...> wrote:
> On Sat, 05 Feb 2005 01:13:51 +1300 you wrote:
> 
> The book at 
> http://www.prllc.com/productcart/pc/viewPrd.asp?
idcategory=6&idproduct=12
> gives a good description of using C on AVRs with lots of good 
example code.

I'll second the recommendation for this book.  I think it's 
excellent.  It does a good job at introducing C in conjunction with 
the AVR, and does a reasonably complex project start to finish.  It 
covers many practical aspects in the project.

Check around, you can find it cheaper online sometimes.  Amazon, or 
even Borders Books.

Dean.

Use this:
http://hubbard.engr.scu.edu/embedded/avr/doc/avr-libc/avr-libc-user-manual/twi_demo.html

Just compile it with AVR GCC, and that's all.  Take
into account that this example is for devices like
24C04.  If you use another device with different
addressing then you will have to modify the source
code.  Check the documentation of mcp23016 and compare
with 24C04's documentation.

Regards

Jose


 --- Lee Leathers <fredit@charter.net> escribió: 
> Hello, I am toying around with an mcp23016 (i2c port
> expander) with my atmega 32.
> 
> I have everything hooked up right.. but lack sample
> code for hardware i2c (as I have heard this is very
> diff from software i2c).
> 
> Does anyone have any stripped down code (code just
> to handle 1 device on the i2c) for the avr to be the
> master on an i2c bus?
> 
> 
> thanks-Lee 


	

	
		
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The is some code on the Bascom list.

http://groups.yahoo.com/group/bascomlist/files/

look for TWI



--- In AVR-Chat@yahoogroups.com, "Lee Leathers" <fredit@c...> wrote:
> Hello, I am toying around with an mcp23016 (i2c port expander) with 
my atmega 32.
> 
> I have everything hooked up right.. but lack sample code for 
hardware i2c (as I have heard this is very diff from software i2c).
> 
> Does anyone have any stripped down code (code just to handle 1 
device on the i2c) for the avr to be the master on an i2c bus?

> 
> 
> thanks-Lee

Hi Lee,

On Sun, Feb 06, 2005 at 02:36:14PM -0500, Lee Leathers wrote:

> I really needed C code.

I think I've come to this thread late, so I'm not sure exactly what
you are doing, Lee, but I have some sample code on my web site for
talking to several different I2C devices using my MAVRIC boards.  My
MAVRIC uses an ATmega128, but the I2C stuff should be very similar to
the ATmega32.

     http://www.bdmicro.com/code

Specifically, look at the following examples:

     * i2cscan - simple I2C bus scanning tool

     * srf08 - ping and read responses from Devantech SRF08 - and
       ultrasonic ranger that communicates using I2C

     * cmps03 - operating with a Devantech CMPS03 compass that uses
       I2C

     * sp03 - operating with a Devantech SP03 text to speech board
       that also uses I2C for communications

In all of these cases, the MAVRIC board is the master device which I
think you mentioned is what you need to do.  All are written using
GCC.

Hope this helps.

-Brian
-- 
Brian Dean
BDMICRO - ATmega128 Based MAVRIC Controllers
http://www.bdmicro.com/

Often, when you load a newer version of Studio, it loads new "firmware" down to the STK500, iirc

 - jim

On Sun, 6 Feb 2005 15:42:10 -0700
"Jim McGinn" <mcginn@mcginnovation.com> wrote:

> Hi,
> 
> I've got
>   AVR Studio 4.05
>   STK500
>     hardware Rev. C-2
>     firmware revsion 1.30
> 
> A friend of mine has
>   AVR Studio 4.06
>   STK500
>     hardware Rev. C-2
>     firmware revsion 1.40
> 
> His computer works with his STK500, and my computer works with mine, but my computer cannot talk to an ATmega8 in his STK500. My computer can read the osc., VTaget, and ARef from his STK500, but it won't talk to the ATmega8.
> 
> Any idea why this might be?
> 
> Regards,
> Jim McGinn

At 09:42 AM 7/02/2005, you wrote:
>Hi,
>
>I've got
>   AVR Studio 4.05
>   STK500

Studio 4.11 has been out for a few weeks if you would like to update.

Regards

John Samperi

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