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tutorials:cb2:customization:lubuntu_nand_change_boot_params

u_boot_env_gen

for lubuntu nand images, the boot parameters is stored at /dev/nandb.

root@cubieboard2:~# strings /dev/nandb
bootdelay=1
bootcmd=run setargs_nand boot_normal
console=ttyS0,115200
nand_root=/dev/system
mmc_root=/dev/mmcblk0p7
init=/init
loglevel=5
setargs_nand=setenv bootargs console=${console} init=${init} loglevel=${loglevel}
setargs_mmc=setenv bootargs console=${console} init=${init} loglevel=${loglevel}
boot_normal=boota 40007800
boot_recovery=sunxi_flash read 40007800 recovery;boota 40007800
boot_fastboot=fastboot
recovery_key_value_max=0x13
recovery_key_value_min=0x10
fastboot_key_value_max=0x8
fastboot_key_value_min=0x2

A way to change it is,

  1. Dump the boot params to a file uEnv.txt
  2. Change as you want
  3. Convert uEnv.txt to a image with u_boot_env_gen tool (download)
  4. dd back the image to /dev/nandb
tutorials/cb2/customization/lubuntu_nand_change_boot_params.txt · Last modified: 2013/12/23 14:50 (external edit)