各位大神，有遇到串口烧录uboot，提示成功，里面的版本却没更新的吗？

你得把日志贴出来

串口已经连接，请给单板上电，若已经上电，请断电后重新上电。
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##################### ---- 100%
Boot download completed!

hi3516cv300 System startup


U-Boot 2010.06-dirty (Aug 22 2018 - 11:19:15)

custom_power_init->45: gpio 0-6 up!!!
Check Flash Memory Controller v100 ... Found
SPI Nor(cs 0) ID: 0xef 0x40 0x18
spi_w25q256fv_qe_enable(193): Error: Disable Quad failed! reg:0x42
Block:64KB Chip:16MB Name:"W25Q128(B/F)V"
SPI Nor total size: 16MB
MMC:   
EMMC/MMC/SD controller initialization.
Card did not respond to voltage select!
No EMMC/MMC/SD device found !

EMMC/MMC/SD controller initialization.
Card did not respond to voltage select!
No EMMC/MMC/SD device found !
In:    serial
Out:   serial
Err:   serial
is_dc_in->72: gpio 0-0:1
*No SD card found!
start download process.

Boot Started successfully!

Send command:        getinfo version
version: 3.0.3
[EOT](OK)
Send command:        getinfo bootmode

spi
[EOT](OK)

Send command:        getinfo spi
Block:64KB Chip:16MB*1
ID:0xEF 0x40 0x18
Name:"W25Q128(B/F)V"
[EOT](OK)

Send command:        sf probe 0
16384 KiB hi_fmc at 0:0 is now current device
[EOT](OK)

Send command:        sf erase 0x0 0x100000

Erasing at 0x10000 --   6% complete.
Erasing at 0x20000 --  12% complete.
Erasing at 0x30000 --  18% complete.
Erasing at 0x40000 --  25% complete.
Erasing at 0x50000 --  31% complete.
Erasing at 0x60000 --  37% complete.
Erasing at 0x70000 --  43% complete.
Erasing at 0x80000 --  50% complete.
Erasing at 0x90000 --  56% complete.
Erasing at 0xa0000 --  62% complete.
Erasing at 0xb0000 --  68% complete.
Erasing at 0xc0000 --  75% complete.
Erasing at 0xd0000 --  81% complete.
Erasing at 0xe0000 --  87% complete.
Erasing at 0xf0000 --  93% complete.
Erasing at 0x100000 -- 100% complete.
[EOT](OK)

Send command:        sf write 0x81000000 0x0 0x50000

Writing at 0x10000 --  20% complete.
Writing at 0x20000 --  40% complete.
Writing at 0x30000 --  60% complete.
Writing at 0x40000 --  80% complete.
Writing at 0x50000 -- 100% complete.
[EOT](OK)

Send command:        reset
reset success!
Partition burnt completed!

重新开机又变回 U-Boot 2010.06-dirty (Apr 24 2018 - 19:16:27)

你烧写了直接知道内存哪里运行下就知道你烧写的是不是本身就是这个code？？

你没有重新编译uboot吧