On 27 March 2013 20:00, Alan Stern st...@rowland.harvard.edu wrote:
On Wed, 27 Mar 2013, David Linares wrote:
Please correct me if I am wrong.
On my iMX25 board, I have got a 1-port root_hub which will provide
500mA max to its unique child.
You should check that against the iMX25's specs.
On Thu, 28 Mar 2013, David Linares wrote:
Ok so here is what I did:
- compiled all USB stuff as modules
- boot up the device with nothing plugged in
- Checked that lsmod | grep usb didn't return anything
- modprobe usbmon (this will also load usbcore)
- start the capture : cat
On 26 March 2013 18:50, Alan Stern st...@rowland.harvard.edu wrote:
On Tue, 26 Mar 2013, David Linares wrote:
The device I am working on is an embedded device, therefore the wireless
adapter has to be connected to the internal hub. This hub and the whole
device
are powered via an usb
On Wed, 27 Mar 2013, David Linares wrote:
Thanks Alan. I understand, but the USB cable is plugged into an AC/DC
adaptor which can provide an output of 1A. After breaking out an USB
cable, I measured that the consumption of my board is around 130mA
(nothing connected to the hub). Then I
On 27 March 2013 18:35, Alan Stern st...@rowland.harvard.edu wrote:
On Wed, 27 Mar 2013, David Linares wrote:
Thanks Alan. I understand, but the USB cable is plugged into an AC/DC
adaptor which can provide an output of 1A. After breaking out an USB
cable, I measured that the consumption of my
On Wed, 27 Mar 2013, David Linares wrote:
Please correct me if I am wrong.
On my iMX25 board, I have got a 1-port root_hub which will provide
500mA max to its unique child.
You should check that against the iMX25's specs. It's possible that
the root hub has a current limit lower than 500
On 25 March 2013 18:07, Alan Stern st...@rowland.harvard.edu wrote:
On Mon, 25 Mar 2013, David Linares wrote:
Start with usbmon (see Documentation/usb/usbmon.txt).
Thanks Alan. I have just compiled my kernel with debugfs and usbmon.
I can now easily capture raw text traces after boot-up.
On Tue, 26 Mar 2013, David Linares wrote:
While enabling usbmon, I noticed something that can be related.
There is a config: Maximum VBUS Power usage which is currently set to
300mA in my case.
That option (USB_GADGET_VBUS_DRAW) applies only to gadgets. That is,
it's meant for the
On 26 March 2013 15:27, Alan Stern st...@rowland.harvard.edu wrote:
On Tue, 26 Mar 2013, David Linares wrote:
While enabling usbmon, I noticed something that can be related.
There is a config: Maximum VBUS Power usage which is currently set to
300mA in my case.
That option
On Tue, 26 Mar 2013, David Linares wrote:
The device I am working on is an embedded device, therefore the wireless
adapter has to be connected to the internal hub. This hub and the whole
device
are powered via an usb cable.
Oh. Then maybe the USB cable doesn't provide enough power
Hi all,
I am currently working on an open-source project using linux 3.5.4 on
an i.MX25 board manufactured by Voipac.
I have been experiencing all sorts of USB issues that I have logged here:
http://pastebin.com/Ry6fdne5
As you will see, it varies from detecting a hub with 0 ports,
On Mon, 25 Mar 2013, David Linares wrote:
Hi all,
I am currently working on an open-source project using linux 3.5.4 on
an i.MX25 board manufactured by Voipac.
I have been experiencing all sorts of USB issues that I have logged here:
http://pastebin.com/Ry6fdne5
As you will see,
On 25 March 2013 14:44, Alan Stern st...@rowland.harvard.edu wrote:
On Mon, 25 Mar 2013, David Linares wrote:
Hi all,
I am currently working on an open-source project using linux 3.5.4 on
an i.MX25 board manufactured by Voipac.
I have been experiencing all sorts of USB issues that I have
On Mon, 25 Mar 2013, David Linares wrote:
Start with usbmon (see Documentation/usb/usbmon.txt).
Thanks Alan. I have just compiled my kernel with debugfs and usbmon.
I can now easily capture raw text traces after boot-up. But I am interested
in capturing these traces at boot time because
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