3516ev200 liteos启动报undefined instruction

用的Hi3516EV200_SDK_V5.0.1.0，编译的sample_venc.bin，启动报下面错误，不知道是啥问题，头一次搞liteos

System startup

Uncompress Ok!

U-Boot 2016.11 (May 09 2019 - 15:43:15 +0800)hi3516ev200

Relocation Offset is: 03735000
Relocating to 43f35000, new gd at 43e94ef0, sp at 43e94ed0
SPI Nor:  NAND:  0 MiB
MMC:   
In:    serial
Out:   serial
Err:   serial
Net:   eth0
Hit any key to stop autoboot:  0
device 0 offset 0x100000, size 0x500000

SF: 5242880 bytes @ 0x100000 Read: OK
## Starting application at 0x40000000 ...
undefined instruction
pc : [<40000004>]          lr : [<43f383a8>]
reloc pc : [<3c8cb004>]    lr : [<408033a8>]
sp : 43e94d80  ip : 00000030     fp : 43f3835c
r10: 00000002  r9 : 43e94ef0     r8 : 43fa0cf0
r7 : 43e954f8  r6 : 40000000     r5 : 00000002  r4 : 43e954fc
r3 : 40000000  r2 : 43e954fc     r1 : 43e954fc  r0 : 00000001
Flags: nzCv  IRQs off  FIQs off  Mode SVC_32
Resetting CPU ...

resetting ...

烧录命令是下面这个
mw.b 42000000 ff 500000;tftp 42000000 sample_venc.bin;sf probe 0;sf erase 100000 500000;sf write 100000 500000

setenv bootcmd 'sf probe 0;sf read 0x40000000 0x100000 0x500000;go 0x40000000'