[Buildroot] Access usb devices from buildroot

[Buildroot] Access usb devices from buildroot

[Santi López]

Hi!



I have a doubt about the usb devices under buildroot.



I?m working with the last release, the ?2010.08?. I successfully created an
image under the cramfs format.

I?m able to boot with this image using the same kernel that use my host
machine, a complete kernel from the distribution.



I?m using an usb stick. I can boot without any problem.



But I can?t mount this usb stick for see other partitions or another stick
in other usb port.



The /var/log/messages don?t reflect any change when I connect a new usb
stick.



At boot time, the original usb stick is detected as /dev/sda1, but, once in
the console, I can?t mount this unit.



I forget something in the buildroot configuration?



Thanks in advance,

Santi L?pez.
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[Buildroot] Access usb devices from buildroot

[Francisco Gonzalez Morell]

On Domingo 12 Septiembre 2010 08:37:46 Santi L?pez escribi?:
> Hi!
> 
> 
> 
> I have a doubt about the usb devices under buildroot.
> 
> 
> 
> I?m working with the last release, the ?2010.08?. I successfully created an
> image under the cramfs format.
> 
> I?m able to boot with this image using the same kernel that use my host
> machine, a complete kernel from the distribution.
> 
> 
> 
> I?m using an usb stick. I can boot without any problem.
> 
> 
> 
> But I can?t mount this usb stick for see other partitions or another stick
> in other usb port.
> 
You must enable usb in the kernel. So reconfigure your kernel and check if it 
is enabled. Also check that the filesystem you use in the usb is enabled (vfat 
or other). Finally use mdev.
This link may be very useful:
http://free-electrons.com/doc/mdev-lab.pdf
Francisco
> 
> 
> The /var/log/messages don?t reflect any change when I connect a new usb
> stick.
> 
> 
> 
> At boot time, the original usb stick is detected as /dev/sda1, but, once in
> the console, I can?t mount this unit.
> 
> 
> 
> I forget something in the buildroot configuration?
> 
> 
> 
> Thanks in advance,
> 
> Santi L?pez.

[Buildroot] Access usb devices from buildroot

[Mitch Davis]

On Sun, Sep 12, 2010 at 9:55 PM, Francisco Gonzalez Morell
<gzmorell@gmail.com> wrote:
> On Domingo 12 Septiembre 2010 08:37:46 Santi L?pez escribi?:
>>
>> I have a doubt about the usb devices under buildroot.
>>
>> But I can?t mount this usb stick for see other partitions or another stick
>> in other usb port.
>>
> You must enable usb in the kernel. So reconfigure your kernel and check if it
> is enabled. Also check that the filesystem you use in the usb is enabled (vfat
> or other). Finally use mdev.
> This link may be very useful:
> http://free-electrons.com/doc/mdev-lab.pdf

Might also be useful to compile and run the "lsusb" program on your target.

  Packages -> Hardware Handling -> usbutils

Mitch.