From mboxrd@z Thu Jan 1 00:00:00 1970 From: Markus =?utf-8?Q?Klotzb=C3=BCcher?= Date: Mon, 14 Jan 2008 09:00:24 +0100 Subject: [U-Boot-Users] problems with CRC in fw_printenv and fw_setenv utility and use In-Reply-To: <14767876.post@talk.nabble.com> (u-boot user's message of "Fri\, 11 Jan 2008 16\:09\:18 -0800 \(PST\)") References: <14767876.post@talk.nabble.com> Message-ID: <87d4s4et0n.fsf@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de u-boot user writes: > I have built the binary fw_printenv by using mtd-user.h from mtd-utils on > the internet as it fw_printenv won't compile it without using that > file. So So you're obviously not using the newest version of U-Boot, what you should. Make sure to read the updated README in tools/env/. > I have used mtd-user.h and mtd-abi.h. The contents of my configuration file > are > # MTD device name Device offset Env. size Flash sector size > /dev/mtd1 0x0000 0x4000 0x4000 Is this in /etc/ ? > When I run fw_printenv it complained with error Warning : Bad CRC using > default environment in env_init function in fw_env.c source code. To gain a > better understanding I print the value crc1 calculated using > crc32(0,environment.data,ENV_SIZE). The value it prints is CRC > computed:FE641197 > If I print the environment.crc value it is D0CA8A0E. As the checksum values > are different crc1_ok is not set and I get the error. Any clue as to why > these values would be different? Probably some mismatch between the information in your config file and the real environment. Where is you're environment located in flash? Is your mtd partitioning right? What does $ cat /proc/mtd show? > When I use the fw_setenv utility to set an environment variable it gives the > following errors > Writing CRC value to flash: D0C78567 > Unlocking flash... > Other dev values are: 0 > Current dev value: 0 > Done > Erasing old environment... > MTD erase error on /dev/mtd1: Invalid argument > Error: can't write fw_env to flash Weird. I would guess your MTD partitioning is wrong. Best regards Markus Klotzbuecher -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office at denx.de