From: Juergen Mueller (juergen.mueller@muellerhydraulik.de)
Date: Tue Sep 17 2002 - 16:21:22 EDT
Hi Uwe! JFFS(2) needs at least 5 blocks of your flash to work. I don't know which flash is used on uCdimm. To spend 5 blocks sometimes is not possible but you have to decide yourself. I got things running on Motorola Coldfire and I think it's stable. You don’t have to use mkfs with JFFS2, if the arena in your flash is clean you can mount it directly. (e.g. mount -t jffs2 /dev/mtd.. /etc/config) The first time all the necessary stuff. JFFS2 only works with mtd-driver not with blkmem. I can give you some further advice if you wan't, just let me know. You have to change some files... Regards. Juergen -----Ursprüngliche Nachricht----- Von: owner-uclinux-dev@uclinux.org [mailto:owner-uclinux-dev@uclinux.org] Im Auftrag von Uwe Beutin Gesendet: Dienstag, 17. September 2002 13:53 An: uClinux Mailing List Betreff: [uClinux-dev] Flash read/write access on a uCdimm Please help! I am desperately looking for a beginner's reference of how to use part of the Flash on a uCdimm to store some configuration files for an application that I wrote. I need less than 4kB for this. I am using the current uClinux-dist and compiled the MTD in the 2.4.17 kernel and the tools in the user section (after replacing sys_errlist[] with strerror() in two files). I would like to store files on the target in /etc/config/..., which should ideally be a mounted as JFFS(2) at bootup with the files appearing there after mount. My questions are: How do I create a /dev/mt.. in the romfs of the target system? I cannot find the mkfs.jffs for the target platform, and how do I install the tools in the romfs?! How can I persistently create a config directory in uClinux-dist/romfs/etc/ on my host system and keep the config files in there? The host romfs dir always reverts to the original layout after a "make". How do I mount/remount the mt device in /etc/config after target-system reboot?! If anybody could help me with some of these questions I would be very grateful. I am currently writing beginner's documents that I make available for everyone...any information that I can get will go into these. Please help! Greetings, Uwe This message resent by the uclinux-dev@uclinux.org list server http://www.uClinux.org/ This message resent by the uclinux-dev@uclinux.org list server http://www.uClinux.org/
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