From: Dharmosoth Seetharam <seetharam_21@yahoo.com>
Date: Wed, 28 Nov 2007 10:45:12 +0000 (GMT)
Subject: [U-Boot-Users] Problem in writing downloaded image to NAND
	device
In-Reply-To: <20071127220850.2174A24075@gemini.denx.de>
Message-ID: <794354.44331.qm@web94811.mail.in2.yahoo.com>
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To: u-boot@lists.denx.de

Hi,

Thank you for quick suggestion.

I have one doubt in NAND write/read PATH. 

> >  nand_write() --> nand_write_ecc() -->
> >  nand_write_page() --> nand_write_buf() -->
> >  
> >
> >  in nand_write_buf() :
> >
> >  for (i=0; i<len; i++) {
> >       writeb(buf[i], this->IO_ADDR_W);
> >
> > << writeb is defined as
> >    (*(volatile unsigned char *)(a) = (v)) >>


How can be "n" (where n=len) characters are 
going to written this->IO_ADDR_W.


As per the above fro loop, I am getting confuse
that is - for each character from buf ( ie. buf[i])
the dest. address will be the same. So, there will be
a overwriting to the same dest. address in NAND.

Is there any logic behind this stmt ?? 


Please suggest me the right way to understand the 
NAND write PATH from U-Boot code.


Thanks,
Seetharam

--- Wolfgang Denk <wd@denx.de> wrote:

> In message
> <914704.38072.qm@web94807.mail.in2.yahoo.com> you
> wrote:
> > 
> > I have downloaded the file
> u-boot-1.3.0-rc1.tar.bz2
> > from the following link.
> > ftp://ftp.denx.de/pub/u-boot/
> 
> Why didn't you use one of the more recent versions
> like 
> 
> > But, U_BOOT_VERSION is having 1.2.0 only.
> 
> Oops? Make sure to unpack, configure and build the
> downloaded tarball,
> please.
> 
> > Is it wrong ?? OR any other U-boot 1.3 is there ?
> > Please point me if i am wrong.
> 
> A short look at the FTP server shows:
> 
> -rw-rw-r--      6866983   Sep  8 01:09  
> u-boot-1.3.0-rc1.tar.bz2
> -rw-r--r--      6876009   Sep 20 00:07  
> u-boot-1.3.0-rc2.tar.bz2
> -rw-rw-r--      8783437   Oct 14 00:13  
> u-boot-1.3.0-rc3.tar.gz
> -rw-rw-r--      6896029   Nov 19 22:25  
> u-boot-1.3.0-rc4.tar.bz2
> -rw-rw-r--      6898443   Nov 19 22:26  
> u-boot-1.3.0.tar.bz2
> 
> So indeed it seems there are never versions
> available.
> 
> 
> 
> Best regards,
> 
> Wolfgang Denk
> 
> -- 
> DENX Software Engineering GmbH,     MD: Wolfgang
> Denk & Detlev Zundel
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194
> Groebenzell, Germany
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80
> Email: wd at denx.de
> "There are things that are so serious that you can 
> only  joke  about
> them"                                               
>     - Heisenberg
> 



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