我也遇到同样的问题了
串口只有如下输出信息
--------------------------------------------------------------------------------
Second Boot by Nexell Co. : Ver0.6.2 - Built on Sep 15 2017 14:56:31
--------------------------------------------------------------------------------
EMA VALUE : 001
123
Lock value = 148
GATE CYC = 0x000318C6
GATE CODE = 0x37373737
Loading from sdmmc...
Image Loading Done!
Launch to 0x42C00000