猫盘ttl刷机，按回车不能中断是为什么

zzzxzzz

用得ch341编程器，用xshell访问，可以看到跑内容，但无论怎么按回车就是不能出现输入命令的情况。
具体跑内容如下，求指导
*** Warning - bad CRC, using default environment
" B4 v8 |* ?0 u6 \7 t: v
MMC:   for ssg ledsdhci@d8000: 0
ÿ** File not found boot/armada-3720-customer0-minifs.dtb **
12931 bytes read in 8 ms (1.5 MiB/s)
3 t- B& k! m2 y- j: Z3 R; z12931 bytes read in 3 ms (4.1 MiB/s)
Comphy-0: USB3_HOST0    5 Gbps   
Comphy-1: SGMII0        1.25 Gbps
4 m  F" f$ u/ q& h/ @+ K8 I4 [6 z2 s) MComphy-2: SATA0         6 Gbps   
gpio: pin GPIO23 (gpio 39) value is 1
# @8 c1 O7 j& Q5 ^) ]! Q/ f** File not found boot/armada-3720-customer0-minifs.dtb **
. \) ~1 @- }6 D& }2 w! G% A( w12931 bytes read in 3 ms (4.1 MiB/s)
Enter Normal mode
$ |+ T% j. i- E2 A/ G1 y& o# FSCSI:  Hit any key to stop autoboot:  0
gpio: pin GPIO221 (gpio 57) value is 0
ÿÿ즰io: pin GPIO221 (gpio 57) value is 1
1 ?3 ]( z! ?2 ^( F( q4 j# P5 igpio: pin GPIO20 (gpio 36) value is 1

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