Lucas Li.
Lucas LiHello,
I have an EVO2 developer modem. I wrote some udev rules to change the default ppp port from ttyUSB0 to sierraUSB0. When I changed the options file I mispelled the port. Unfortunately, I power cycled the device before I realized it. The modem now hangs at start up trying to initialize ppp. I can’t go in the rootfs of the modem via ssh nor debug serial. I can go into U-boot but without network, the device can’t tftp the new rootfs. Is there a way out of this one?
Thanks
Lucas
Bryan TranHi Lucas,
When you go into the U-boot prompt using the 3pin serial debug cable. Do you see your Ethernet LED still lit up ? If so, then you can do as follow:
a. Go to your Development PC machine and Type:
– source env-oe.sh
– bitbake corecdp-base-image.
*Create a corecdp-base-image. Also, if you have the line uncommented: export TFTPBOOT_DIR=/tftpboot – in the file env-oe.sh, then you should have a soft link to the image in the tftpboot folder.
b. Boot your OCG to the U-boot prompt and type: printenv[Enter]
*This will list out the environment variables that currently set on the OCG.
c. Look for:
-ipaddr <–This should set to the ip address of the OCG
-Serverip <–This should set to the IP address of your PC development machine.
*You would want to have them in the same network.
d. Type: run krb[Enter]
*If you have a TFTP server set up on your development PC, then it would upload both: kernel and rootfs to your OCG.
Regards,
BT
Jesse Gilles> I can go into U-boot but without network, the device can’t tftp the new rootfs.
You should still able to flash the rootfs over Ethernet via U-boot, as BT posted.
Lucas LiYou are right. I don’t know why I thought there was a server on the web that had the rootfs. I re-flashed the rootfs via Ethernet. Thanks again for all your help.
Lucas