missing environment variable: pxeuuid bootfile

求问启动后出现下情况, img文件都已经正确烧录了, 是什么问题呢？
几个error的地方在下加粗:
具体如下




U-Boot 2017.09-02444-g54720da (Feb 12 2019 - 11:01:53 +0800)

Model: Rockchip RK3399 Evaluation Board
DRAM:  3.8 GiB
Relocation Offset is: f5be0000
Using default environment

dwmmc@fe320000: 1, sdhci@fe330000: 0
Card did not respond to voltage select!
mmc_init: -95, time 9
switch to partitions #0, OK
mmc0(part 0) is current device
Bootdev: mmc 0
PartType: EFI
boot mode: None
init_resource_list: failed to get resource part, ret=-1
DTB: rk-kernel.dtb
init_resource_list: failed to get resource part, ret=-1
Can't find file:rk-kernel.dtb
init_kernel_dtb dtb in resource read fail
Can't find UCLASS_IO_DOMAIN driver -19
Model: Rockchip RK3399 Evaluation Board
rockchip_set_serialno: could not find efuse device
CLK:
aplll 816000 KHz
apllb 24000 KHz
dpll 800000 KHz
cpll 24000 KHz
gpll 800000 KHz
npll 600000 KHz
vpll 24000 KHz
aclk_perihp 133333 KHz
hclk_perihp 66666 KHz
pclk_perihp 33333 KHz
aclk_perilp0 266666 KHz
hclk_perilp0 88888 KHz
pclk_perilp0 44444 KHz
hclk_perilp1 100000 KHz
pclk_perilp1 50000 KHz
Net:   No ethernet found.
Hit key to stop autoboot('CTRL+C'):  0
ANDROID: reboot reason: "(none)"
** Invalid Android Image header **
load_android_image: boot part load fail, ret=-1
Android boot failed, error -1.
=Booting Rockchip format image=
boot_rockchip_image kernel or boot part info error
Card did not respond to voltage select!
mmc_init: -95, time 9
switch to partitions #0, OK
mmc0(part 0) is current device
Failed to mount ext2 filesystem...
** Unrecognized filesystem type **
starting USB...
USB0:   Register 2000140 NbrPorts 2
Starting the controller
USB XHCI 1.10
USB1:   Register 2000140 NbrPorts 2
Starting the controller
USB XHCI 1.10
scanning bus 0 for devices... 1 USB Device(s) found
scanning bus 1 for devices... 1 USB Device(s) found
       scanning usb for storage devices... 0 Storage Device(s) found

Device 0: unknown device
No ethernet found.
missing environment variable: pxeuuid
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/00000000
No ethernet found.
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/0000000
No ethernet found.
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/000000
No ethernet found.
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/00000
No ethernet found.
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/0000
No ethernet found.
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/000
No ethernet found.
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/00
No ethernet found.
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/0
No ethernet found.
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/default-arm-rockchip
No ethernet found.
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/default-arm
No ethernet found.
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/default
No ethernet found.
Config file not found
No ethernet found.
No ethernet found.

=>

再确认下配置和各种镜像有没有烧错

问题已解决, 重新烧录img需要先清除flash, 忘了这一步