CMG-DCM
ipkg remove
to remove the package. This will not affect the operation of the system in any other way; however, it may prevent Gü ralp Systems' engineers from being able to assist you in the event of problems.
ipkg can also be used for other package management tasks; however, if you remove software from the DCM, or replace packages with versions
incompatible with the rest of the system, you risk leaving the unit in an unrecoverable state. We recommend that you use only upgrade wherever possible, to ensure that you have a fully tested set of packages.
The firmware
Reinstalling the firmware from scratch is a more involved process, and you should only need to do it if the root or boot partitions of the DCM become corrupted. In this case, you can use the boot loader (which is resident in hardware) to update them. You will need a second DCM or Linux computer attached to the console port in order to do this.
Note that the firmware is not the same as the distribution. If you want to ensure that your DCM has all the latest software, you should use the upgrade command described above. Reinstalling the firmware will reset any changes you
have made to the system.
The procedure for installing new firmware depends on which revision of the DCM design you have. All recent DCM units use “MkII” firmware. If you are unsure which hardware type you are using, contact Gür alp Systems.
MkII DCM or AM
Mark II DCMs and AMs have a 256 kb bootloader, a 1 Mb kernel image and a 64 Mb file system image. Currently all surface DCM units are the Mark II design.
1.Download the latest revision of the root (and boot, if appropriate) files
from the Gü ralp Systems website at http://www.guralp.net/software/modules/DCM/
2.Obtain the flashdcm tool from the same site. This is a Linux utility which enables you to access the DCM's firmware. If you are using a second DCM, flashdcm will already be present on it.
3.Note the baud rate of the DCM's console port (115200 by default).
4.Power down the DCM.
5.On the second computer or DCM, issue the command
92 | Issue A |
