5. Appendix A. Making Ubuntu Demo Image¶
There is a Canonical trademark policy when using Ubuntu in commercial usage or redistribution. The AMOS-820 HMI Solution Pack does not provide Ubuntu DEMO image for evaluation actively. User can follow Freescale’s policy and get the demo image from Freescale official web site, if user would like to evaluate Ubuntu on VAB-820.
This section will guide you through making an Ubuntu demo image, then copy it into Micro SD storage card or eMMC.
Required files
Ubuntu file system: You can download Ubuntu file system from Freescale official web site. The file name for this example is oneiric.tgz.
Figure 1: Freescale website screenshot
EVK/vab820_demo_image.tar.gz: We provide some scripts for you to install demo images on Micro SD card and eMMC.
5.1. Making demo image into Micro SD¶
Step 1
Prepare a Micro SD storage card (at least 4GB size and Class 4), and insert it into your Linux developing PC (Ubuntu 10.04.x x86 at least).
Step 2
Copy the demo image EVK/vab-820_demo_image.tar.bz2 to your developing PC.
Step 3
Open Terminal utility.
Step 4
Untar vab-820_demo_image.tar.bz2:
user@ubuntu:~/$ tar jxvf vab-820_demo_image.tar.bz2
Step 5
Put the downloaded file system oneiric.tgz under vab820_demo_image/:
user@ubuntu:~/$ cp oneiric.tgz vab-820_demo_image/
Step 6
Change directory to vab-820_demo_image/:
user@ubuntu:~/$ cd vab-820_demo_image/
user@ubuntu:~/vab-820_demo_image$
Step 7
Run 820_create_sd_fs.sh script:
user@ubuntu:~/vab-820_demo_image$ ./820_create_sd_fs.sh /dev/sdb
Step 8
Remove the Micro SD card from your developing PC and insert it into VAB-820. Switch the jumper to boot from Micro SD.
Step 9
Modify the u-boot parameter to load kernel from Micro SD card:
setenv bootcmd 'run bootcmd_sd'
Step 10
After booting to ubuntu, open Terminal utility and run the script on Desktop to update X11 acceleration files:
linaro@linaro:~/$ cd Desktop/820_x11_hw_accel/
linaro@linaro:~/Desktop/820_x11_hw_accel$ ./X11-acceleration-setup.sh
5.2. Making demo image into eMMC¶
Step 1
Copy the demo image EVK/vab-820_demo_image.tar.bz2 to your bootable Micro SD card:
user@ubuntu:~/$ cp vab-820_demo_image.tar.bz2 /media/sd_820/home/linaro/
Step 2
Open Terminal utility and untar vab-820_demo_image.tar.bz2:
user@ubuntu:~/$ cd /media/sd_820/home/linaro
user@ubuntu:/media/sdcard/home/linaro$ tar jxvf vab-820_demo_image.tar.bz2
Step 3
Put the downloaded file system oneiric.tgz under vab820_demo_image/:
user@ubuntu:~/$ cp oneiric.tgz /media/sd_820/home/linaro/vab-820_demo_image
Step 4
Insert the Micro SD card into VAB-820 and switch the jumper to boot VAB-820 from Micro SD card.
Step 5
Open Terminal utility.
Step 6 Change directory to vab-820_demo_image/:
linaro@linaro:~/$ cd vab-820_demo_image/
linaro@linaro:~/vab-820_demo_image$
Step 7
Run 820_create_emmc_fs.sh script:
linaro@linaro:~/vab-820_demo_image$ ./820_create_emmc_fs.sh
Step 8
Remove the Micro SD card from VAB-820. Switch the jumper to boot from SPI ROM and reboot VAB-820.
Step 9
Modify the u-boot parameter to load kernel from eMMC:
setenv bootcmd ‘run bootcmd_mmc’
Step 10
After booting to ubuntu, open Terminal utility and run the script on Desktop to update some X11 acceleration related files:
linaro@linaro:~/$ cd Desktop/820_x11_hw_accel/
linaro@linaro:~/Desktop/820_x11_hw_accel$ ./X11-acceleration-setup.sh
5.3. Setting u-boot parameters¶
Step 1
Setting the display devices.
[HDMI]
To set HDMI as display output:
setenv bootargs_base ‘setenv bootargs console=ttymxc1,115200 ${hdmi}’
To set HDMI resolution:
setenv hdmi ‘video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24’
[LVDS]
To set LVDS as display output:
setenv bootargs_base ‘setenv bootargs console=ttymxc1,115200 ${lvds}’
To set LVDS resolution:
setenv lvds ‘video=mxcfb0:dev= ldb,LDB-WSXGA+,if=RGB24 ldb=spl0’
Note
The LVDS type for this example is TP220C01 V0(AUO G220SVN01.0)
Step 2
Setting storage devices
[eMMC]
Enabling booting from eMMC:
setenv bootargs_mmc 'set bootargs ${bootargs} root=/dev/mmcblk0p1 rw rootwait'
setenv bootcmd_mmc 'run bootargs_base bootargs_sd; mmc dev 1; ext2load mmc 1:1 $loadaddr $vkernel && bootm'
setenv bootcmd 'run bootcmd_mc'
[Micro SD storage card]
Enabling booting from SD card:
setenv bootargs_sd 'set bootargs ${bootargs} root=/dev/mmcblk1p1 rw rootwait'
setenv bootcmd_sd 'run bootargs_base bootargs_sd; mmc dev 0; ext2load mmc 0:1 $loadaddr $vkernel && bootm'
setenv bootcmd 'run bootcmd_sd'
Step 3
Setting MAC address. Two ways to set MAC address:
[Way 1]
Pass MAC address from u-boot parameter; please ensure that the “ethaddr” has a valid MAC address as parameter (replace xx:xx:xx:xx:xx:xx with that MAC address below). User can set a real MAC address according to sticker on Ethernet PHY:
setenv ethaddr 'xx:xx:xx:xx:xx:xx'
setenv bootargs_base 'setenv bootargs console=ttymxc1,115200 fec_mac=${ethaddr} ${hdmi}'
[Way 2]
Here, user can set the MAC address in eFuse. The address is on the Ethernet physical port.
The MAC Address for this example is 11:22:33:44:55:66. User can write the MAC address:
imxotp blow --force 22 0x33445566
imxotp blow --force 23 0x1122
User can check the MAC address:
imxotp read 22
0x33445566 (Shows the address that the user wrote)
imxotp read 23
0x1122 (Shows the address that the user wrote)
It is a must to reset after you set MAC address and save:
reset
Warning
Be careful to write MAC address into eFuse, because the eFuse can only be written once.