hi3531DV200设置从emmc启动，为什么重启后没有启动？

HITOOL 工具（HiTool-BVT-5.3.7）界面串口打印的信息：

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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Boot download completed!

System startup

Uncompress………….Ok

U-Boot 2016.11 (May 16 2020 - 11:19:59 +0800)hi3531dv200

Relocation Offset is: 1775d000
Relocating to 5ff5d000, new gd at 5febce20, sp at 5febce10
MMC: mmc->ocr_from_bootrom 0x00000000
sdhci-hisi: tuning done! valid phase shift [18, 13] Final Phase:31
First descriptor is NOT a primary desc on 0:1
MMC/SD Card:
MID: 0x15
Read Block: 512 Bytes
Write Block: 512 Bytes
Chip Size: 7456M Bytes (High Capacity)
Name: “8GTF4”
Chip Type: MMC
Version: 5.1
Speed: 148500000Hz
Bus Width: 4bit
Mode: HS200
hisi-sdhci: 0 (eMMC)
* Warning - bad CRC, using default environment

In: serial
Out: serial
Err: serial
Net: gmac0
Error: gmac0 address not set.

start download process.

Boot started successfully!

Send command: mmc write 0x0 0x41000000 0x0 0x19a

MMC write: dev # 0, block # 0, count 410 … 410 blocks written: OK
EOT
Fastboot burnt successfully!

Send command: reset
reset success!

上电重启，
uboot重启后调试串口只打印一次空格，uboot没有启动，为什么？