Re: mpc8313erdb
From: Carlos Roberto Moratelli <hidden>
Date: 2008-06-20 16:53:39
Date: Fri, 20 Jun 2008 16:12:20 +0530 From: "Nidhi Dua" <redacted> Subject: mpc8313erdb To: linuxppc-embedded@ozlabs.org Message-ID: [ref] Content-Type: text/plain; charset="iso-8859-1" We are using the board MPC8313ERDB and we are facing problems regarding u-boot environment variables(the environment variables displayed after giving 'printenv' command at u-boot prompt). We are following the steps stated as below: 1. =>printenv output is: .... .... bootargs=root=/dev/mtdblock2 rootfstype=jffs2 rw console=ttyS0,115200 bootcmd=bootm fe100000 - fe700000 filesize=1a4a05 fileaddr=200000 ipaddr=192.168.1.101 serverip=192.168.1.57 stdin=serial stdout=serial stderr=serial ethact=TSEC0 Here ethact is TSEC0 by default. 2. =>setenv ethact TSEC1 3. =>saveenv output: Saving Environment to Flash... Un-Protected 1 sectors Erasing Flash... . done Erased 1 sectors Writing to Flash... done Protected 1 sectors Here we have set the ethact variable to TSEC1 and saved it. Now it is showing that this value of ethact is burnt in flash. But after the board is reset, 4. =>printenv ileaddr=200000 ipaddr=192.168.1.101 serverip=192.168.1.57 stdin=serial stdout=serial stderr=serial ethact=TSEC0 Here again the value of ethact is changed to TSEC0. we have following questions: question 1: We want to know the reason why it(ethact variable) changes to TSEC0 everytime with a reset.
This variable (ethact) isn't save with the enviroment variables.
quoted hunk
question2: After we have set ethact to TSEC1 and saved it(=>saveenv) and tried to ping the Host from u-boot prompt it is working (displaying: 'host alive'). But when we are trying to ping Target board from the host it is showing: PING 192.168.1.101 (192.168.1.101) 56(84) bytes of data.quoted
From 192.168.1.57 icmp_seq=2 Destination Host Unreachable From 192.168.1.57 icmp_seq=3 Destination Host Unreachable.... ....--- 192.168.1.101 ping statistics ---12 packets transmitted, 0 received, +9 errors, 100% packet loss, time 11002ms , pipe 3 Why is it happening so?
Ping from a host to U-Boot should't work. U-Boot isn't able to respond a ping protocol. Maybe this link can be usefull: http://docs.blackfin.uclinux.org/doku.php?id=bootloaders:u-boot:faq
question 3: After we have set 'ethact' to TSEC1, the kernel is loaded, and we have logged -in, when we try to ping the Host from target it says '100% packet lost'. also we are unable to ping target from the host. Why is it happening so?
After the kernel boot, did you try using ifconfig command to configure the ethernet interface?
Awaiting a prompt reply Regards Nidhi Dua
I hope this can help you. Regards Carlos R. Moratelli