Hi all,
I tried to use uboot-envtools but I got some problems:
1) Couldn't change partitions for save uboot environment.
I want to save uboot environment in to my partition ( Fat32 ) by
change value of CONFIG_SYS_MMC_ENV_PART in file :
include/configs/am335x_evm.h
to 3 4 but it didn't work.
Because I dont use sdcard then rootfs saw eMMC became mmcblk0.
I think: 0=mmcblk0
1=mmcblk0boot0
2=mmcblk0boot1
3=mmcblk0p1 (boot)
4=mmcblk0p2 (place I want to save uboot environment)
5=mmcblk0p3 (rootfs)
Uboot just only work with CONFIG_SYS_MMC_ENV_PART = 1 or 2.
2) Couldn't get environment with fw_printenv on /dev/mmcblk0boot1 or
/dev/mmcblk0boot0
Hex Dump:
# hexdump -C /dev/mmcblk0boot0
00000000 b8 fd 66 da 02 61 72 63 68 3d 61 72 6d 00 62 61 |..f..arch=
arm.ba|
00000010 75 64 72 61 74 65 3d 31 31 35 32 30 30 00 62 6f |udrate=
115200.bo|
00000020 61 72 64 3d 61 6d 33 33 35 78 00 62 6f 61 72 64
|ard=am335x.board|
00000030 5f 6e 61 6d 65 3d 41 33 33 35 42 4e 4c 54 00 62
|_name=A335BNLT.b|
.......
00000ea0 65 6e 64 6f 72 3d 61 62 63 00 76 65 72 3d 55 2d
|endor=abc.ver=U-|
00000eb0 42 6f 6f 74 20 32 30 31 35 2e 30 37 2d 72 63 31 |Boot
2015.07-rc1|
00000ec0 2d 30 30 32 35 35 2d 67 30 65 36 62 37 61 32 2d
|-00255-g0e6b7a2-|
00000ed0 64 69 72 74 79 20 28 4d 61 79 20 32 31 20 32 30 |dirty (May
21 20|
00000ee0 31 35 20 2d 20 31 36 3a 34 31 3a 30 33 29 00 00 |15 -
16:41:03)..|
00000ef0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|................|
*
00020000 06 a6 e0 be 01 61 72 63 68 3d 61 72 6d 00 62 61 |.....arch=
arm.ba|
00020010 75 64 72 61 74 65 3d 31 31 35 32 30 30 00 62 6f |udrate=
115200.bo|
00020020 61 72 64 3d 61 6d 33 33 35 78 00 62 6f 61 72 64
|ard=am335x.board|
.......
00020ed0 69 72 74 79 20 28 4d 61 79 20 32 31 20 32 30 31 |irty (May
21 201|
00020ee0 35 20 2d 20 31 36 3a 34 31 3a 30 33 29 00 00 00 |5 -
16:41:03)...|
00020ef0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|................|
My config:
# cat /etc/fw_env.config
/dev/mmcblk0boot0 0x0000 0x20000 0x20000
Environment size: 3957/131067 bytes
Get env:
# fw_printenv
Warning: Bad CRC, using default environment
bootcmd=bootp; setenv bootargs root=/dev/nfs
nfsroot=${serverip}:${rootpath}
ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off; bootm
bootdelay=5
baudrate=115200
I tried to change many configurations but its always fail. Did I get
wrong config?
Thanks
Tuan Nguyen
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