[gentoo-embedded] Specify Kernel Version for Module emerge

[gentoo-embedded] Specify Kernel Version for Module emerge

[Joshua ChaitinPollak]

I'm trying to emerge the madwifi-ng module into my embedded system's  
dev environment, but the ebuild is trying compile against the kernel  
version installed on my desktop, not the version installed in the  
chrooted development environment. Is there a way to force external  
module ebuilds to use a specific kernel version?

Thanks,

-Josh

-- 
Joshua ChaitinPollak
Software Engineer
Kiva Systems


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Re: [gentoo-embedded] Specify Kernel Version for Module emerge

[Ahmed Ammar]

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Sorry how did you build your kernel ? Did you not build it inside the same
chroot ? and is it in ($chroot)/usr/src/linux ?

Because if you chroot into your dev setup then you will have _no_ access to
the desktop machine's files etc (from within the chroot) and therfore
emerging inside the chroot can not use linux source outside the chroot. You
must be either doing something wrong or doing this in a way very different
from how I would.

Ahmed.

On 26/06/06, Joshua ChaitinPollak <jpollak@kivasystems.com> wrote:
>
> I'm trying to emerge the madwifi-ng module into my embedded system's
> dev environment, but the ebuild is trying compile against the kernel
> version installed on my desktop, not the version installed in the
> chrooted development environment. Is there a way to force external
> module ebuilds to use a specific kernel version?
>
> Thanks,
>
> -Josh
>
> --
> Joshua ChaitinPollak
> Software Engineer
> Kiva Systems
>
>
> --
> gentoo-embedded@gentoo.org mailing list
>
>

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Re: [gentoo-embedded] Specify Kernel Version for Module emerge

[Joshua ChaitinPollak]

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I am building the module inside the chrooted environment. It seems  
that the kernel module ebuild's use uname to figure out which kernel  
version to compile against, because my desktop is running 2.6.15- 
gentoo-r2 and the ebuild fails with "/lib/modules/2.6.15-gentoo-r2/ 
build is missing" I just now realized the error also says "Please set  
KERNELPATH", so I'm going to try setting that and see if it helps.

-Josh

On Jun 26, 2006, at 1:40 PM, Ahmed Ammar wrote:

> Sorry how did you build your kernel ? Did you not build it inside  
> the same chroot ? and is it in ($chroot)/usr/src/linux ?
>
> Because if you chroot into your dev setup then you will have _no_  
> access to the desktop machine's files etc (from within the chroot)  
> and therfore emerging inside the chroot can not use linux source  
> outside the chroot. You must be either doing something wrong or  
> doing this in a way very different from how I would.
>
> Ahmed.
>
> On 26/06/06, Joshua ChaitinPollak <jpollak@kivasystems.com> wrote:
> I'm trying to emerge the madwifi-ng module into my embedded system's
> dev environment, but the ebuild is trying compile against the kernel
> version installed on my desktop, not the version installed in the
> chrooted development environment. Is there a way to force external
> module ebuilds to use a specific kernel version?
>
> Thanks,
>
> -Josh
>
> --
> Joshua ChaitinPollak
> Software Engineer
> Kiva Systems
>
>
> --
> gentoo-embedded@gentoo.org mailing list
>
>

-- 
Joshua ChaitinPollak
Software Engineer
Kiva Systems



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Re: [gentoo-embedded] Specify Kernel Version for Module emerge

[Ahmed Ammar]

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Did that work ?

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Re: [gentoo-embedded] Specify Kernel Version for Module emerge

[Joshua ChaitinPollak]

Yup:

export KERNELPATH=/usr/src/linux
emerge <modules>

Then I had to re-write the Soekris gpio ebuild for the new 2.6 kernel  
drivers. Ugh.

On Jun 26, 2006, at 4:15 PM, Ahmed Ammar wrote:

> Did that work ?

-- 
Joshua ChaitinPollak
Software Engineer
Kiva Systems


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Re: [gentoo-embedded] Specify Kernel Version for Module emerge

[Ned Ludd]

On Mon, 2006-06-26 at 16:26 -0400, Joshua ChaitinPollak wrote:
> Yup:
> 
> export KERNELPATH=/usr/src/linux
> emerge <modules>
> 
> Then I had to re-write the Soekris gpio ebuild for the new 2.6 kernel  
> drivers. Ugh.

Correct the gpio ebuild is for 2.4.x 
What did you have to rewrite exactly?


-- 
Ned Ludd <solar@gentoo.org>
Gentoo Linux

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Re: [gentoo-embedded] Specify Kernel Version for Module emerge

[Joshua ChaitinPollak]

On Jun 27, 2006, at 8:58 PM, Ned Ludd wrote:

> On Mon, 2006-06-26 at 16:26 -0400, Joshua ChaitinPollak wrote:
>> Yup:
>>
>> export KERNELPATH=/usr/src/linux
>> emerge <modules>
>>
>> Then I had to re-write the Soekris gpio ebuild for the new 2.6 kernel
>> drivers. Ugh.
>
> Correct the gpio ebuild is for 2.4.x
> What did you have to rewrite exactly?

I'm sure there is a more elegant way to do what I did, but I was in a  
rush. I would submit a patch, but as you probably could guess from  
the portage/ busybox patch bug you commented on earlier, I'm neither  
a portage nor patch expert.

Here is a little step-by-step of what I did, I would be happy to zip  
up what I've done and send it to you if it would be helpful.

I created a dev-embedded/gpio-new directory in my portage overlay,  
and copied the gpio-1.3.2 ebuild into it, renaming it gpio- 
new-1.3.2.ebuild. I did that because I didn't know if it is possible  
to differentiate ebuilds based on kernel versions.

In the new ebuild, I updated the homepage and src_uri variables for  
the location of the new code (because it is hosted by a different  
developer)

I set the S variable because the downloaded tarball extracts to $ 
{WORKDIR}/gpio-1.3.2+trillian0.01

I moved the MODULE_NAMES and BUILD_PARAMS variables into the pkg_setup 
() function (unneeded I'm sure)

Set the BUILD_TARGET variable to be "" instead of "all".

Added a line to pkg_setup():

cp ${FILESDIR}/Makefile ./

created gpio-new/files/Makefile, which is the gpio-1.3.2+trillian0.01  
Makefile with the following lines appended to it:

module: default

clean:
	rm -f *.ko *.o

-- 
Joshua ChaitinPollak
Software Engineer
Kiva Systems


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[gentoo-embedded] ftdi ft232r programming howto

[andreas.sumper]

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Hi list!

Has anybody ever tried to communicate through a ft232r, which is a usb to 
rs232 converter?
I read through the documentation of ftdi (www.ftdichip.com) but all I 
found, was the documentation for windows.
I want to make this converter work on an embedded linux box, running a 
2.6.14 kernel, including the module (ftdi_sio)
I see the device (/dev/ttyUSB0) but, how can I configure it (buffers, 
transfer speed, ...) and how can I read from the device and write to the 
device.

Could anybody give me some advice on where to start or did anybody write 
some piece of code, which works with such a converter?

Thanks in advance!

Kind regards,
Andy

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Re: [gentoo-embedded] ftdi ft232r programming howto

[Joshua ChaitinPollak]

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On Jul 3, 2006, at 10:25 AM, andreas.sumper@cnsystems.at wrote:

>
> Hi list!
>
> Has anybody ever tried to communicate through a ft232r, which is a  
> usb to rs232 converter?
> I read through the documentation of ftdi (www.ftdichip.com) but all  
> I found, was the documentation for windows.
> I want to make this converter work on an embedded linux box,  
> running a 2.6.14 kernel, including the module (ftdi_sio)
> I see the device (/dev/ttyUSB0) but, how can I configure it  
> (buffers, transfer speed, ...) and how can I read from the device  
> and write to the device.
>

If you are using C, just use it exactly like you would use a serial  
port and it will work fine.

If you see ttyUSB0 already, I'm sure everything is working correctly,  
but just to be sure, you need the usbserial portion of the kernel and  
the correct USB to serial drivers compiled into the kernel, or as a  
module.

-Josh


-- 
Joshua ChaitinPollak
Software Engineer
Kiva Systems



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Re: [gentoo-embedded] ftdi ft232r programming howto

[wireless]

andreas.sumper@cnsystems.at wrote:
> Hi list!
> 
> Has anybody ever tried to communicate through a ft232r, which is a usb to 
> rs232 converter?
> I read through the documentation of ftdi (www.ftdichip.com) but all I 
> found, was the documentation for windows.
> I want to make this converter work on an embedded linux box, running a 
> 2.6.14 kernel, including the module (ftdi_sio)
> I see the device (/dev/ttyUSB0) but, how can I configure it (buffers, 
> transfer speed, ...) and how can I read from the device and write to the 
> device.

This page
http://www.ftdichip.com/Products/EvaluationKits/USB-Serial.htm

Says this:
 The US232R-100 evaluation cable is supplied in retail packaging
which includes instructions together with a Drivers and Utilities
CD complete with Microsoft WHQL certified VCP drivers for Windows
XP.  Drivers for the Apple Mac, Linux and other versions of
Windows are also included on the CD.......



Interesting device.  Did you purchase a raw chip, dev/eval kit,
or a complete module ready for use?

How much does it cost, and where did you purchase it from?

I'm looking for a way to add a serial16550/rs232) port(s) to a
portable, so this might be an option....


James

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Re: [gentoo-embedded] ftdi ft232r programming howto

[Henrik Brix Andersen]

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On Mon, Jul 03, 2006 at 04:25:30PM +0200, andreas.sumper@cnsystems.at wrote:
> Could anybody give me some advice on where to start or did anybody write 
> some piece of code, which works with such a converter?

I have recently written a custom driver for a device with such an
USB-UART.

Take a look at /usr/src/linux/drivers/usb/serial/ftdi_sio.[ch] - the
programming interface is well documented there. There's also a
user-space library for direct communication with the FTDI chips and an
utility for programming the EEPROM [1], but neither of them support
the FT232R yet.

Regards,
Brix

[1]: http://www.intra2net.com/de/produkte/opensource/ftdi/
-- 
Henrik Brix Andersen <brix@gentoo.org>
Gentoo Metadistribution | Mobile computing herd

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Re: Re: [gentoo-embedded] ftdi ft232r programming howto

[andreas.sumper]

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Joshua ChaitinPollak <jpollak@kivasystems.com> schrieb am 07/03/2006 
05:38:40 PM:

> On Jul 3, 2006, at 10:25 AM, andreas.sumper@cnsystems.at wrote:
> 
> 
> Hi list! 
> 
> Has anybody ever tried to communicate through a ft232r, which is a 
> usb to rs232 converter? 
> I read through the documentation of ftdi (www.ftdichip.com) but all 
> I found, was the documentation for windows. 
> I want to make this converter work on an embedded linux box, running
> a 2.6.14 kernel, including the module (ftdi_sio) 
> I see the device (/dev/ttyUSB0) but, how can I configure it 
> (buffers, transfer speed, ...) and how can I read from the device 
> and write to the device. 

> 
> If you are using C, just use it exactly like you would use a serial 
> port and it will work fine.
> 
> If you see ttyUSB0 already, I'm sure everything is working 
> correctly, but just to be sure, you need the usbserial portion of 
> the kernel and the correct USB to serial drivers compiled into the 
> kernel, or as a module.

I see the ttyUSB0 - device and I tried to work with it, just like ttySx. 
the strange thing is, that after a very short period, the application 
running on the embedded board seems to not get any more data from the 
device. I guess, this is due to buffering things or so. That´s why I asked 
for some code or header file to be included, to set the correct values. I 
have to port a qt-application to the system. The application itself works 
on windows as well as linux and on the embedded board. But on windows, one 
has to set the properties of the usb-device through the driver. That´s why 
I asked for code, on how to do this on linux. 
 
Thanks in advance!

kind regards,
Andy

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Antwort: Re: [gentoo-embedded] ftdi ft232r programming howto

[andreas.sumper]

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wireless <wireless@tampabay.rr.com> schrieb am 07/03/2006 06:18:40 PM:

> andreas.sumper@cnsystems.at wrote:
> > Hi list!
> > 
> > Has anybody ever tried to communicate through a ft232r, which is a usb 
to 
> > rs232 converter?
> > I read through the documentation of ftdi (www.ftdichip.com) but all I 
> > found, was the documentation for windows.
> > I want to make this converter work on an embedded linux box, running a 

> > 2.6.14 kernel, including the module (ftdi_sio)
> > I see the device (/dev/ttyUSB0) but, how can I configure it (buffers, 
> > transfer speed, ...) and how can I read from the device and write to 
the 
> > device.
> 
> This page
> http://www.ftdichip.com/Products/EvaluationKits/USB-Serial.htm
> 
> Says this:
>  The US232R-100 evaluation cable is supplied in retail packaging
> which includes instructions together with a Drivers and Utilities
> CD complete with Microsoft WHQL certified VCP drivers for Windows
> XP.  Drivers for the Apple Mac, Linux and other versions of
> Windows are also included on the CD.......
> 

I found a header file on the cd, after getting them from our windows 
developers *argh*

I will have a look at the header-file. Maybe, this makes it a little bit 
clearer!

thanks for the hint!
 
> 
> Interesting device.  Did you purchase a raw chip, dev/eval kit,
> or a complete module ready for use?

we purchased the modules ready for use and the raw chips.
 
> How much does it cost, and where did you purchase it from?

the chip is about 2.50 euros. the module is about 10 euros.
 
> I'm looking for a way to add a serial16550/rs232) port(s) to a
> portable, so this might be an option....
> 
> 

Bye,
Andy

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Re: [gentoo-embedded] ftdi ft232r programming howto

[Harald Schioeberg]

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> I see the ttyUSB0 - device and I tried to work with it, just like ttySx. 
> the strange thing is, that after a very short period, the application 
> running on the embedded board seems to not get any more data from the 
> device. 

Totally unrelated to your device, this sounds very much like a serial
handshake problem, try setting all serial ports to no handshake at all,
if you haven't done yet.

Harald

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Antwort: Re: [gentoo-embedded] ftdi ft232r programming howto

[andreas.sumper]

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Hi!

Harald Schioeberg <schioebe@net.in.tum.de> schrieb am 07/04/2006 06:43:42 
PM:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> 
> > I see the ttyUSB0 - device and I tried to work with it, just like 
ttySx. 
> > the strange thing is, that after a very short period, the application 
> > running on the embedded board seems to not get any more data from the 
> > device. 
> 
> Totally unrelated to your device, this sounds very much like a serial
> handshake problem, try setting all serial ports to no handshake at all,
> if you haven't done yet.

How do I do that? I am not new to linux, but I did not need this before? 
BTW it works with the other serial devices like /dev/ttyS0, ... Only 
/dev/ttyUSBx make troubles.
In windows, they reconfigure the virtual com ports. But I just have no 
clue, how I can do such a thing in linux...
 
thanks for the hint!

Ciao,
Andy

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Re: Antwort: Re: [gentoo-embedded] ftdi ft232r programming howto

[wireless]

andreas.sumper@cnsystems.at wrote:
> Hi!
> 
> Harald Schioeberg <schioebe@net.in.tum.de> schrieb am 07/04/2006 06:43:42 
> PM:
> 
> 
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>>
>>
>>
>>>I see the ttyUSB0 - device and I tried to work with it, just like 
> 
> ttySx. 
> 
>>>the strange thing is, that after a very short period, the application 
>>>running on the embedded board seems to not get any more data from the 
>>>device. 
>>
>>Totally unrelated to your device, this sounds very much like a serial
>>handshake problem, try setting all serial ports to no handshake at all,
>>if you haven't done yet.
> 
> 
> How do I do that? I am not new to linux, but I did not need this before? 
> BTW it works with the other serial devices like /dev/ttyS0, ... Only 
> /dev/ttyUSBx make troubles.
> In windows, they reconfigure the virtual com ports. But I just have no 
> clue, how I can do such a thing in linux...

ON my gentoo systems (non-embedded) I use 'minicom' to set the
handshake, parity and start/stop bits....

I'm not sure minicom is available or will work in your case, as
it is a terminal program and for setting up modem communications.

hth,

James



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Re: Antwort: Re: [gentoo-embedded] ftdi ft232r programming howto

[Valentin Longchamp]

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Hello,
>>
>>> I see the ttyUSB0 - device and I tried to work with it, just like 
> ttySx. 
>>> the strange thing is, that after a very short period, the application 
>>> running on the embedded board seems to not get any more data from the 
>>> device. 
>> Totally unrelated to your device, this sounds very much like a serial
>> handshake problem, try setting all serial ports to no handshake at all,
>> if you haven't done yet.
> 
> How do I do that? I am not new to linux, but I did not need this before? 
> BTW it works with the other serial devices like /dev/ttyS0, ... Only 
> /dev/ttyUSBx make troubles.
> In windows, they reconfigure the virtual com ports. But I just have no 
> clue, how I can do such a thing in linux...
>  

You should be able to find all you need to configure your serial port in
your program using this howto:
http://www.tldp.org/HOWTO/Serial-Programming-HOWTO/

I've used this with a FTDI2232 chip with success.

I hope it helps

Valentin
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Antwort: Re: Antwort: Re: [gentoo-embedded] ftdi ft232r programming howto

[andreas.sumper]

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Valentin Longchamp <valentin.longchamp@epfl.ch> schrieb am 07/05/2006 
09:06:54 AM:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Hello,
> >>
> >>> I see the ttyUSB0 - device and I tried to work with it, just like 
> > ttySx. 
> >>> the strange thing is, that after a very short period, the 
application 
> >>> running on the embedded board seems to not get any more data from 
the 
> >>> device. 
> >> Totally unrelated to your device, this sounds very much like a serial
> >> handshake problem, try setting all serial ports to no handshake at 
all,
> >> if you haven't done yet.
> > 
> > How do I do that? I am not new to linux, but I did not need this 
before? 
> > BTW it works with the other serial devices like /dev/ttyS0, ... Only 
> > /dev/ttyUSBx make troubles.
> > In windows, they reconfigure the virtual com ports. But I just have no 

> > clue, how I can do such a thing in linux...
> > 
> 
> You should be able to find all you need to configure your serial port in
> your program using this howto:
> http://www.tldp.org/HOWTO/Serial-Programming-HOWTO/
> 
> I've used this with a FTDI2232 chip with success.
> 
> I hope it helps

Thanks!
I will give it a try during the day!

bye,
Andy

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Re: Antwort: Re: [gentoo-embedded] ftdi ft232r programming howto

[Harald Schioeberg]

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>> try setting all serial ports to no handshake at all,
>> if you haven't done yet.
> 
> How do I do that? 

aside from all the pointers that were already on the list, setserial
might also be worth a look.

harald
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Re: Antwort: Re: [gentoo-embedded] ftdi ft232r programming howto

[wireless]

> You should be able to find all you need to configure your serial port in
> your program using this howto:
> http://www.tldp.org/HOWTO/Serial-Programming-HOWTO/

> Valentin

Hello Valentin,

Very useful document. One point you can clear up for me. I have
read that the serial hardware system within a 2.6 linux kernel
structure have change. IF this is correct ?

Then is this document still 100% accurate for embedded systems
based on a 2.6 linux kernel?

It there are differences, is there a companion document for 2.6
based embedded linux systems?


James


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