I'll have few holidays in coming month so was thinking to
have something interesting to play around. I have done little work
with ARMx with GNU tool chain but honestly i should say that there
are still things that make me feel unfomfortable. I remember reading
this [ http://www.embedded.com/design/opensource/200000632?_requestid=46173
] 7 part article while ago and it looks a good basic starting point to
me.
I would love to hear if anyone out there has read/followed this
tutorial? Or any other such tutorial would be appreciated.
One thing more, I have tried digikey and mouser and its easy to get
the development board. But there is no information what CPU they would
be shipping. any hints to make sure that I get AT91SAM7S64 (64KB of
on-chip flash ROM and 16KB of static RAM)?
regards,
ali
All the ones iI've got have the '256 on them. This is what the EK userguide
says:
"The board is generally equipped with an AT91SAM7S256
(64-pin PQFP package)"
--
Stef (remove caps, dashes and .invalid from e-mail address to reply by mail)
But any how to get AT91SAM7S64 on it?
I think the amount of FLASH and RAM are the only differences, as the 256 has
more than the 64 then there should not be a problem. You can use either.
--
Regards,
Richard.
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> I think the amount of FLASH and RAM are the only differences, as the 256 has
> more than the 64 then there should not be a problem. You can use either.
And if you really want that SAM7S64 part, you can replace what's on the EVB.
It has dual footprint for the MCU.
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> And if you really want that SAM7S64 part, you can replace what's on the EVB.
> It has dual footprint for the MCU.
The LQFP48 is only required for the '32 all others are LQFP64. You need to
remove the existing CPU anyway, as the LQFP48 is under the LQFP64.
But if you really can only use the '64 (I really can't understand why
though), buying that separately and replacing it is a good option.
Thanks for input.
> But if you really can only use the '64 (I really can't understand why though),
I was just trying to stick to tutorial specifications. Anyway, I'll
give it a try.
http://www.embedded.com/design/opensource/200000632?_requestid=46173
thanks,
ali
Folks thanks for input. And I hope x256 will be ok.
But, any thoughts for tutorial ? I can't see even a single comment
there (Embedded.com) although It was uploaded on 06/26/07.
regards,
ali
When is the next article supposed to come out? I don't want to rain on your
parade, but it has been four months since the first article and I couldn't
find any sign of the second one.
I just got started in the ARM7 world myself. I bought an Olimex board from
www.sparkfun.com (a way cool place), a JTAG module, and dove in. I was
going to get a SAM7, but switched to the NXP at the last minute because the
Atmel board was out of stock. After digging thru both manufacturers'
documentation, I think I like the NXP a bit better anyway.
There's a fairly good tutorial by a fellow named James Lynch. It's called
"ARM Cross Development with Eclipse". It shows how to put together a
working toolchain for cross compiling.
Search embedded.com for 'Building Bare-Metal ARM Systems with GNU' you
will see '10' part tutorial there.
Yeah , NXP is fine but just wan tto stick to atmel;-)
ali
I read all of it and thought it was very good. Especially useful if
you are thinking about experimenting with c++ - I have not seen this
covered before.
The actual code is labelled "all rights reserved". I am not sure what
that is supposed to mean in practice but I guess you can't use it
as-is for the basis of your own projects. But the insight gained
should still be worthwhile.
--
John Devereux
The FreeRTOS.org site also has some information on using Eclipse/GCC/ARM:
http://www.freertos.org/portlpc2368_Eclipse.html
http://www.freertos.org/portLM3Sxxxx_Eclipse.html
[just working on one for the SAM7 too]
Using Eclipse with the FreeRTOS.org demos:
http://www.freertos.org/Eclipse.html
http://www.freertos.org/Eclipse_CDT.html
Note that these direct links won't show you the menu frame. To see the menu
frame go directly to the homepage.
Yes John, I must agree with you. It is indeed kinda unique and article
concentrates on over all system rather just a single thing. I can see
people recommending another tutorial which is using AMR7 from NXP ,
but IMHO that tutorial is merely for configuring the toolchain and
thats it. It does not talk about such details that are covered in Miro
Samek's article.
Maybe no one has tried that and thats why there are no comments. Or
maybe no worth to comment;-)
ali
What is the difference between AT91SAM7S-EK IAR and AT91SAM7S-EK RSV?
thanks,
ali
Ok, IAR means board shipped with IDE from IAR company and J-LINK ICE
interface with its A/B type USB cable.
But no Idea what comes with RSV version!
ali