# Forum: ARM programming with GCC/GNU tools USB Interface for SAM7X256

 Author: Lidya K. (bluetude) Posted on: 2007-04-12 15:12

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I need to start working with SAM7X256 but I don't have any background
with hardware stuffs.
What I need to do is to provide a USB interface to support the
communication between my PC (running a C++ application) and the
SAM7-EX256 board (from Olimex) by using USB cable.

I've seen an "AT91SAM7S USB Examples" in
http://www.siwawi.arubi.uni-kl.de/avr_projects/arm_projects/ which use
"IAR Embedded Workbench IDE". I think this IDE is used commercially and
prefer to use the Yagarto/Eclipse.

Is there someone who has an idea about the steps I need to take?

 Author: Jonathan D. (dumarjo) Posted on: 2007-04-12 18:54

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Lidya Kosasih wrote:
> I need to start working with SAM7X256 but I don't have any background
> with hardware stuffs.
> What I need to do is to provide a USB interface to support the
> communication between my PC (running a C++ application) and the
> SAM7-EX256 board (from Olimex) by using USB cable.
>
> I've seen an "AT91SAM7S USB Examples" in
> http://www.siwawi.arubi.uni-kl.de/avr_projects/arm_projects/ which use
> "IAR Embedded Workbench IDE". I think this IDE is used commercially and
> prefer to use the Yagarto/Eclipse.
>
> Is there someone who has an idea about the steps I need to take?

for the sam7x you can look at freertos, he have a sample program thas
embeded the web server and a usb framwork. He can be a good start for
you. and also it's use the gcc makefile and gcc toolchain. the example
is lwip with sam7x chip.

good luck

Jonathan

 Author: Martin Thomas (Guest) Posted on: 2007-04-13 15:52

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Lidya Kosasih wrote:

> I've seen an "AT91SAM7S USB Examples" in
> http://www.siwawi.arubi.uni-kl.de/avr_projects/arm_projects/ which use
> "IAR Embedded Workbench IDE".

No, this is wrong. Where did you find this statement on my pages? The
code from my pages are ports of original IAR or ADS/RV-code provided by
Atmel (from atmel.com or at91.com) to the GNU arm-elf toolchain (as in
Yagarto, WinARM etc.).

> Is there someone who has an idea about the steps I need to take?

Atmel provides the "USB framework" for different AT91 on atmel.com. My
GNU-port of the framework should also work with different targets since
I have tried to port the configuration-options too (Core+HID has been
tested with AT91SAM7S256 and AT91SAM7A3). See my port of the Atmel
USB-framework from the above page: Makefile and mt_defs.mk

Martin Thomas

 Author: Lidya K. (bluetude) Posted on: 2007-04-17 16:03

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Jonathan Dumaresq wrote:
> for the sam7x you can look at freertos, he have a sample program thas
> embeded the web server and a usb framwork. He can be a good start for
> you. and also it's use the gcc makefile and gcc toolchain. the example
> is lwip with sam7x chip.

Thanks for the reference.
For couple of days, I've tried to run the demo program. I used parallel
JTAG (not USB JTAG), Olimex SAM7EX256 board, "OpenOCD, Toolchain,
Eclipse IDE" from Yagarto.

Unfortunately, I can't compile using Eclipse (although I've change my
makefile). So I compile it using "make all" from "windows cmd" and it
works. The debuging ("using Eclipse + GDB" or insight tools that I took
from Yagarto) won't work too. It stucks up while trying to do this
process : searching for compile errors.

So what I did was wrote the bin file to the flash using OpenOCD and
Telnet. It works. After reset and shutdown the device, the program runs
by blinking the LCD and gave a sound every time the LCD blinks.
(This is not the condition expected from the demo, surely because I used
different dev. board but with the same source code :))

But, my PC can detect the USB connection and install the driver.
Unfortunately, the Ethernet is not as nice as USB. My computer cannot
detect the LAN connection, although I've use a crossover cable to
connect the board (runs the demo program) with my PC.

Lidya

 Author: Jonathan D. (dumarjo) Posted on: 2007-04-18 15:11

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Lidya Kosasih wrote:
> Jonathan Dumaresq wrote:
>> for the sam7x you can look at freertos, he have a sample program thas
>> embeded the web server and a usb framwork. He can be a good start for
>> you. and also it's use the gcc makefile and gcc toolchain. the example
>> is lwip with sam7x chip.
>
> Thanks for the reference.
> For couple of days, I've tried to run the demo program. I used parallel
> JTAG (not USB JTAG), Olimex SAM7EX256 board, "OpenOCD, Toolchain,
> Eclipse IDE" from Yagarto.
>
> Unfortunately, I can't compile using Eclipse (although I've change my
> makefile). So I compile it using "make all" from "windows cmd" and it
> works. The debuging ("using Eclipse + GDB" or insight tools that I took
> from Yagarto) won't work too. It stucks up while trying to do this
> process : searching for compile errors.
>
> So what I did was wrote the bin file to the flash using OpenOCD and
> Telnet. It works. After reset and shutdown the device, the program runs
> by blinking the LCD and gave a sound every time the LCD blinks.
> (This is not the condition expected from the demo, surely because I used
> different dev. board but with the same source code :))
>
> But, my PC can detect the USB connection and install the driver.
> Unfortunately, the Ethernet is not as nice as USB. My computer cannot
> detect the LAN connection, although I've use a crossover cable to
> connect the board (runs the demo program) with my PC.
>
>
> Lidya

take a look at this document for the debugging process.

http://gnuarm.alexthegeek.com/

Jonathan

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