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Guralp Systems CMG-DCM User Manual

Page 126

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CMG-DCM Data Communications Module

which you will be using.

If the device has several serial interfaces, the command
serialmap may help you determine which port number

corresponds to which device:

[root @ dcm] # serialmap

Library version: libserialmap Version 1.0.5 with

LIBGCONFIGDB

4 serial ports

Port 0, Key 7000, name ttyS0, device /dev/ttyS0, baud

38400

Port 1, Key 7001, name ttyS1, device /dev/ttyS1, baud

19200

Port 2, Key 7002, name ttyS2, device /dev/ttyS2, baud

19200

Port 3, Key 7003, name ttyS3, device /dev/ttyS3, baud

19200

flashdcm also has an -e option, which wipes clean the Flash

memory used for the filesystem

before providing the new

firmware. Some surface DCM units require you to do this when
installing a root image. If you use the -e option to install a root

image, you must also provide a new boot image, since the boot

image in memory will be erased.

6. Power up the DCM. The second computer or DCM will detect

messages coming from the bootloader of the DCM, and

automatically interrupt the boot process to provide the new
firmware.

7. Wait for the new firmware to be uploaded. The DCM will reboot

automatically at the end of transmission, and the flashdcm

process will terminate. This may take several minutes.

At this point, you will have a minimal installation of the DCM
software, and can proceed to commissioning the system.

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