Question about 802.11 WLAN on eCos

Question about 802.11 WLAN on eCos

[Vlasios Tsiatsis]

Hi everyone, 
i have seen that there was a great interest in WLAN on
eCos. I am also interested in getting PCMCIA 802.11
support on  an eCos platform so i have s few
questions:
How easy is it to write an 802.11  driver or port some
other driver to eCos ? Has anyone started doing that ?
Any useful pointers would be appreciated.

thanks, 
vlassis



	
		
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Re: Question about 802.11 WLAN on eCos

[Weqaar Janjua]

Read my posts on this list, subject "WLAN on eCos
(HW/SW design)".
-Weqaar Janjua

--- Vlasios Tsiatsis <vlasios@yahoo.com> wrote:

> Hi everyone, 
> i have seen that there was a great interest in WLAN
> on
> eCos. I am also interested in getting PCMCIA 802.11
> support on  an eCos platform so i have s few
> questions:
> How easy is it to write an 802.11  driver or port
> some
> other driver to eCos ? Has anyone started doing that
> ?
> Any useful pointers would be appreciated.
> 
> thanks, 
> vlassis
> 
> 
> 
> 	
> 		
> __________________________________ 
> Do you Yahoo!? 
> Yahoo! Mail - You care about security. So do we. 
> http://promotions.yahoo.com/new_mail
> 



		
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Redhat booting Linux - newbie question

[Srivatsan]

[-- Attachment #1: Type: text/plain, Size: 1681 bytes --]



Hi all,

     I am a newbie to Redhat and am considering some pointers to the
following questions.

    1) I tried to boot Linux using Redhat on a Rattler board. The board
I am having is a Rattler board (MPC8280) but the Linux kernel I am
having is a kernel for MPC8260ads board (Please don't ask me to change
the kernel for Rattler board). I build the kernel with initial ramdisk
and download the kernel onto the target (rattler board) at the address
0x00400000.[This is the address which is given in mkimage command]. The
kernel build is zImage.initrd.elf .

       But when I tried to give a <go 0x00400000> redboot starts
printing some junk for every key pressed on the keyboard [I feel that
the control is not transferred to the Linux Kernel but is still in the
Redboot or redboot is throwing some exception]. Please give me guidance
on booting the Linux Kernel with using Redboot.


2) Can anyone give me pointers on how much time Redboot takes to boot a
Linux Kernel (redboot boot + decompression]?

With Best Regards,
C.R.Srivatsan   

    



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Re: Redhat booting Linux - newbie question

[Weqaar Janjua]

MPC8280 has an onboard redBoot monitor which does
support linux booting but the compressed zImage is
loaded at the specified address location and will be
decompressed and run from a different location
depending on the available memory in RAM, for this you
need to convert the kernel image that you built into
an S-record file so you don't need to specify an
address when you boot. Also there might be interrupt
layout differences between MPC8280 and MPC8260ads, so
make sure all interrupts can be disabled. Which
filesystem are u using on flash, jffs2?
--------------------------------------
Weqaar Janjua
Senior, Computer Systems
Arizona State University - Polytechnic
--------------------------------------

--- Srivatsan <srivatsan@deccanetworld.com> wrote:

> 
> 
> Hi all,
> 
>      I am a newbie to Redhat and am considering some
> pointers to the
> following questions.
> 
>     1) I tried to boot Linux using Redhat on a
> Rattler board. The board
> I am having is a Rattler board (MPC8280) but the
> Linux kernel I am
> having is a kernel for MPC8260ads board (Please
> don't ask me to change
> the kernel for Rattler board). I build the kernel
> with initial ramdisk
> and download the kernel onto the target (rattler
> board) at the address
> 0x00400000.[This is the address which is given in
> mkimage command]. The
> kernel build is zImage.initrd.elf .
> 
>        But when I tried to give a <go 0x00400000>
> redboot starts
> printing some junk for every key pressed on the
> keyboard [I feel that
> the control is not transferred to the Linux Kernel
> but is still in the
> Redboot or redboot is throwing some exception].
> Please give me guidance
> on booting the Linux Kernel with using Redboot.
> 
> 
> 2) Can anyone give me pointers on how much time
> Redboot takes to boot a
> Linux Kernel (redboot boot + decompression]?
> 
> With Best Regards,
> C.R.Srivatsan   
> 
>     
> 
> 
> 
>
********************************DISCLAIMER**********************************
> 
> This e-mail and any attachment is for authorised use
> by the intended
> recipient(s) only. It may contain proprietary
> material, confidential
> information and/or be subject to legal privilege of
> Deccanet Designs Ltd.
> If you have received this message in error, please
> notify the originator
> immediately. If you are not the intended recipient,
> you are notified that
> you are strictly prohibited from retaining, using,
> copying, altering or
> disclosing the contents of this message.
> 
>
****************************************************************************



		
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RE: Redhat booting Linux - newbie question

[Srivatsan]

[-- Attachment #1: Type: text/plain, Size: 4642 bytes --]

Thanks Weqaar.

1) I have tried the Srecord part. I tried building the Srecord image but
it 
   is hanging the whole board. Nothing is displayed on the console, I
feel 
   there could be some porting issues or it could be that my building 
   steps are not proper or might be the board in my hand isn't working 
   properly. 

2) The kernel is configured for the following:

    a) Platform support is for ADS8260
    b) RAM Disk support and default ram disk size is 8192
    c) Initial ram disk support
    d) Support for console on virtual terminal
    e) standard/generic (8250/16550 and compatible UARTs)
    f) Support for console on serial port
    g) Ext3 journaling file system support.
    h) /proc file system support
    i) Enable SCC console
    j) Zlib decompression support
    k) Include KGDB support
    

3) I do a make dep, make zImage.initrd 
   for converting the kernel into a srec image I do 
         ppc_82xx-objcopy -O srec zImage.initrd

4) Anybody can share a working kernel for the Rattler board so that I
can 
   zero in on the problem.

With Best Regards,
C.R.Srivatsan

 

-----Original Message-----
From: Weqaar Janjua [mailto:weqaar@yahoo.com] 
Sent: Wednesday, December 08, 2004 11:38 AM
To: Srivatsan; ecos-devel@sources.redhat.com
Subject: Re: Redhat booting Linux - newbie question

MPC8280 has an onboard redBoot monitor which does
support linux booting but the compressed zImage is
loaded at the specified address location and will be
decompressed and run from a different location
depending on the available memory in RAM, for this you
need to convert the kernel image that you built into
an S-record file so you don't need to specify an
address when you boot. Also there might be interrupt
layout differences between MPC8280 and MPC8260ads, so
make sure all interrupts can be disabled. Which
filesystem are u using on flash, jffs2?
--------------------------------------
Weqaar Janjua
Senior, Computer Systems
Arizona State University - Polytechnic
--------------------------------------

--- Srivatsan <srivatsan@deccanetworld.com> wrote:

> 
> 
> Hi all,
> 
>      I am a newbie to Redhat and am considering some
> pointers to the
> following questions.
> 
>     1) I tried to boot Linux using Redhat on a
> Rattler board. The board
> I am having is a Rattler board (MPC8280) but the
> Linux kernel I am
> having is a kernel for MPC8260ads board (Please
> don't ask me to change
> the kernel for Rattler board). I build the kernel
> with initial ramdisk
> and download the kernel onto the target (rattler
> board) at the address
> 0x00400000.[This is the address which is given in
> mkimage command]. The
> kernel build is zImage.initrd.elf .
> 
>        But when I tried to give a <go 0x00400000>
> redboot starts
> printing some junk for every key pressed on the
> keyboard [I feel that
> the control is not transferred to the Linux Kernel
> but is still in the
> Redboot or redboot is throwing some exception].
> Please give me guidance
> on booting the Linux Kernel with using Redboot.
> 
> 
> 2) Can anyone give me pointers on how much time
> Redboot takes to boot a
> Linux Kernel (redboot boot + decompression]?
> 
> With Best Regards,
> C.R.Srivatsan   
> 
>     
> 
> 
> 
>
********************************DISCLAIMER******************************
****
> 
> This e-mail and any attachment is for authorised use
> by the intended
> recipient(s) only. It may contain proprietary
> material, confidential
> information and/or be subject to legal privilege of
> Deccanet Designs Ltd.
> If you have received this message in error, please
> notify the originator
> immediately. If you are not the intended recipient,
> you are notified that
> you are strictly prohibited from retaining, using,
> copying, altering or
> disclosing the contents of this message.
> 
>
************************************************************************
****



		
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********************************DISCLAIMER**********************************

This e-mail and any attachment is for authorised use by the intended
recipient(s) only. It may contain proprietary material, confidential
information and/or be subject to legal privilege of Deccanet Designs Ltd.
If you have received this message in error, please notify the originator
immediately. If you are not the intended recipient, you are notified that
you are strictly prohibited from retaining, using, copying, altering or
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****************************************************************************