Guralp Systems CMG-DCM - Manual (Page 126)

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.
126 Issue F