Getting started with Linux on CM-X300
Contents
Preparation steps
- Obtain a PC workstation with serial communication port.
- Install TFTP server on host PC. For Windows machines we recommend TFTPD32 included in this distribution package.
- Download the Linux distribution package for CM-X300 from CompuLab's website . Unzip the package to a directory on your host workstation.
- All image files mentioned below can be found in images subdirectory
- Make sure that Linux kernel binary image kernel.img, ramdisk image ramdisk.img and bootloader script image first_boot.img are accessible by the TFTP server.
- - On Windows machine: copy kernel.img, ramdisk.img and first_boot.img to the same folder and point the TFTP server to that folder
- - On Linux machine: copy kernel.img, ramdisk.img and first_boot.img to TFTP sevrver root directory, usually /tftpboot or /tftproot.
- Copy debian-image.jffs2 and cm-x300-kernel.jffs2 from Linux distribution package for CM-X300 either to USB flash drive or to a directory exported through NFS.
Image installation
- Connect CM-X300's ETH0 port to your local Ethernet
- Connect the host PC to the CM-X300 via a null modem cable supplied with the Eval Kit.
- Start terminal emulation software on your PC using the COM port to which the null modem is connected. Set baud rate to 38400 bps, 8 bit per frame, 1 stop bit, no parity, no flow control.
- Turn on the CM-X300. The U-Boot will start and you will get a command prompt.
|
If the boot settings of your CM-X300 are different than default, you may need to press and hold ^C while turning the CM-X300 on, in order to get command prompt. |
- You can use U-boot dhcp command to obtain IP address or manually set ipaddr and serverip environment variables:
> setenv serverip <host ip address> > setenv ipaddr <CM-X300 ip address> > saveenv
- Use the following U-boot command to boot Linux on CM-X300:
> tftp 80400000 first_boot.img && autoscr 80400000
- After the ramdisk image is loaded you will get Linux login prompt. Login as root into the system.
- Now you can install kernel and filesystem images to the NAND flash using USB flash drive or NFS share as described below.
Installation using USB flash drive
- Connect USB flash drive to CM-X300. Use USB2 (host/slave) port.
- The USB flash drive will be automatically mounted under /media/sda1
- Format the NAND flash and write the kernel image and Debian filesystem image onto it:
$ flash_eraseall /dev/mtd4 $ flash_eraseall /dev/mtd5 $ nandwrite /dev/mtd4 /media/sda1/cm-x300-kernel.jffs2 $ nandwrite /dev/mtd5 /media/sda1/debian-image.jffs2
Installation using NFS
- During boot the CM-X300 tries to obtain an IP address using DHCP. If you do not have DHCP server you can set the CM-X300 IP address statically using ifconfig:
$ ifconfig eth0 <ip address>
- Mount the NFS share containing debian-image.jffs2 image:
$ mount <host ip>:/path/to/nfs/share /mnt/net
- Format the NAND flash and write the kernel image and Debian filesystem image onto it:
$ flash_eraseall /dev/mtd4 $ flash_eraseall /dev/mtd5 $ nandwrite /dev/mtd4 /media/sda1/cm-x300-kernel.jffs2 $ nandwrite /dev/mtd5 /media/sda1/debian-image.jffs2
After Installation
- Reset the CM-X300.
- To start Linux type:
> fsload; bootm
- If you want Linux to start automatically, type:
> setenv bootdelay <delay in seconds> > setenv bootcmd "fsload; bootm" > saveenv > boot
If you want to get back to U-Boot prompt, hold Ctrl-C during reset.
Connection and Logging In
Use the following usernames and passwords to login:
Account with administrative privileges:
User: root Password: 111111
Regular user account:
User: user Password: 111111
In addition to these accounts CM-X270 allows anonymous FTP access.
