Texas Instruments TMS320DM6446 DVEVM v2.0 manual Booting the New Linux Kernel

Booting the New Linux Kernel

5)You can test the rebuilt DVEVM software by booting your NFS file system and running the demos from the command line as described in Section 3.4.

4.7Booting the New Linux Kernel

After building the new kernel, in order to use it to boot the DaVinci board, you must transfer it to the board via TFTP. It is assumed you have completed the steps in Section 4.5, Building a New Linux Kernel and the boot file, uImage has been copied to /tftpboot (or some other site-specific TFTP accessible location).

1)Power on the EVM board, and abort the automatic boot sequence by pressing a key in the console window (Section 2.2).

2)Set the following environment variables. (This assumes you are starting from a default, clean U-Boot environment. See Section 3.1, Default Boot Configuration for information on the U-Boot default environment.)

EVM # setenv bootcmd 'dhcp;bootm'

EVM # setenv serverip <tftp server ip address>

EVM # setenv bootfile uImage

EVM # setenv bootargs video=davincifb:vid0=720x576x16, 2500K:vid1=720x576x16,2500K:osd0=720x576x16,2025K davinci_enc_mngr.ch0_output=COMPOSITE davinci_enc_mngr.ch0_mode=$(videostd) console=ttyS0,115200n8 noinitrd rw ip=dhcp root=/dev/hda1 mem=120M

Note that the setenv bootargs command should be typed on a single line.

3) Boot the board:

EVM # boot

This configuration boots a new Linux kernel via TFTP with a hard drive based file system. To boot via TFTP using an NFS file system, see Section A.4.4.

For instructions on how to verify that your host workstation is running a

TFTP server, and for instructions on what to do if it isn’t, see Section A.3.

For more details on booting, see Section A.4.

DVEVM Software Setup 4-17