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Discussion Groups | AT91SAM ARM | USB connection Failing for olimex SAM7EX256 board
For users of the Atmel AT91SAM7 and AT91SAM9 ARM CPU chips. Atmel has taken a new direction by combining on chip flash and ram with the ARM CPU on a single die. This provides low cost devices for small systems using the ARM CPU. This group is to exchange information to help users get started and learn how to use the devices.
USB connection Failing for olimex SAM7EX256 board - skillgames2004 - Jun 2 22:03:48 2008
Hi All,
I recently bought Olimex SAM7EX256 board. When I connect it to the USB
port, it is not getting recognized by the WinXP. If I start SAM-BA
v2.6 and try to connect to \usb\ARM0, it says 'Failed to open Connection'.
I tried Erasing Flash by ERASE pin as per this tutorial
http://www.sparkfun.com/datasheets/DevTools/SAM7/Your%20Atmel%20Board%20May%20Not%20Be%20Dead.pdf
and also TST pin setting. What could be wrong? I tried to use serial
port connection through USB to serial adapter with board powered by
USB. This also is giving the same message 'Failed to open Connection'.
Any clues will be appreciated. Thanks in advance.
Kishor
------------------------------------
(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )
I recently bought Olimex SAM7EX256 board. When I connect it to the USB
port, it is not getting recognized by the WinXP. If I start SAM-BA
v2.6 and try to connect to \usb\ARM0, it says 'Failed to open Connection'.
I tried Erasing Flash by ERASE pin as per this tutorial
http://www.sparkfun.com/datasheets/DevTools/SAM7/Your%20Atmel%20Board%20May%20Not%20Be%20Dead.pdf
and also TST pin setting. What could be wrong? I tried to use serial
port connection through USB to serial adapter with board powered by
USB. This also is giving the same message 'Failed to open Connection'.
Any clues will be appreciated. Thanks in advance.
Kishor
------------------------------------
(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )
Re: USB connection Failing for olimex SAM7EX256 board - Bogdan Marinescu - Jun 3 8:13:09 2008
It doesn't work when powered from USB, you need to use an external power supply.
1. Switch the board's power supply jumper from "USB" to "EXT".
2. Apply power to the board
3. Connect the "erase" jumper and leave it connected for a second or two.
4. Disconnect the "erase" jumper
5. Insert the USB cable
6. Press RESET.
This sequence always does it for me.
On Mon, Jun 2, 2008 at 7:58 PM, skillgames2004 wrote:
> Hi All,
>
> I recently bought Olimex SAM7EX256 board. When I connect it to the USB
> port, it is not getting recognized by the WinXP. If I start SAM-BA
> v2.6 and try to connect to \usb\ARM0, it says 'Failed to open Connection'.
>
> I tried Erasing Flash by ERASE pin as per this tutorial
> http://www.sparkfun.com/datasheets/DevTools/SAM7/Your%20Atmel%20Board%20May%20Not%20Be%20Dead.pdf
> and also TST pin setting. What could be wrong? I tried to use serial
> port connection through USB to serial adapter with board powered by
> USB. This also is giving the same message 'Failed to open Connection'.
>
> Any clues will be appreciated. Thanks in advance.
>
> Kishor
------------------------------------
(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )
1. Switch the board's power supply jumper from "USB" to "EXT".
2. Apply power to the board
3. Connect the "erase" jumper and leave it connected for a second or two.
4. Disconnect the "erase" jumper
5. Insert the USB cable
6. Press RESET.
This sequence always does it for me.
On Mon, Jun 2, 2008 at 7:58 PM, skillgames2004
> Hi All,
>
> I recently bought Olimex SAM7EX256 board. When I connect it to the USB
> port, it is not getting recognized by the WinXP. If I start SAM-BA
> v2.6 and try to connect to \usb\ARM0, it says 'Failed to open Connection'.
>
> I tried Erasing Flash by ERASE pin as per this tutorial
> http://www.sparkfun.com/datasheets/DevTools/SAM7/Your%20Atmel%20Board%20May%20Not%20Be%20Dead.pdf
> and also TST pin setting. What could be wrong? I tried to use serial
> port connection through USB to serial adapter with board powered by
> USB. This also is giving the same message 'Failed to open Connection'.
>
> Any clues will be appreciated. Thanks in advance.
>
> Kishor
------------------------------------
(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )
Re: USB connection Failing for olimex SAM7EX256 board - skillgames2004 - Jun 3 13:17:34 2008
Hi,
Thanks for replying.I tried changing to external power supply, but
there is no change. SAM-BA still gives the same message 'Failed to
open connection'.
Is there anyway to debug using serial port or otherwise?
--- In A...@yahoogroups.com, "Bogdan Marinescu"
wrote:
>
> It doesn't work when powered from USB, you need to use an external
power supply.
>
> 1. Switch the board's power supply jumper from "USB" to "EXT".
> 2. Apply power to the board
> 3. Connect the "erase" jumper and leave it connected for a second or
two.
> 4. Disconnect the "erase" jumper
> 5. Insert the USB cable
> 6. Press RESET.
>
> This sequence always does it for me.
>
------------------------------------
(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )
Thanks for replying.I tried changing to external power supply, but
there is no change. SAM-BA still gives the same message 'Failed to
open connection'.
Is there anyway to debug using serial port or otherwise?
--- In A...@yahoogroups.com, "Bogdan Marinescu"
>
> It doesn't work when powered from USB, you need to use an external
power supply.
>
> 1. Switch the board's power supply jumper from "USB" to "EXT".
> 2. Apply power to the board
> 3. Connect the "erase" jumper and leave it connected for a second or
two.
> 4. Disconnect the "erase" jumper
> 5. Insert the USB cable
> 6. Press RESET.
>
> This sequence always does it for me.
>
------------------------------------
(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )
Re: Re: USB connection Failing for olimex SAM7EX256 board - kish...@dataone.in - Jun 5 1:20:54 2008
I got it working. I think the problem was with JTAGSel jumper. Once I removed that jumper,
Windows recognised the board as Atmel and I am able to connect to it through USB from
SAM-BA.
------------------------------------
(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )
------------------------------------
(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )