在928上跑mpp/sample的一些摄像头例程，报错

在928上跑mpp/sample的一些摄像头例程，在执行./load_ss928v100 -a - sensor0 os08a20加载mpp驱动时报错：

insmod: can't insert 'sys_config.ko': No such file or directory
insmod: can't insert 'ot_osal.ko': No such file or directory

用tftp手动把sys_config.ko和ot_osal.ko拷贝进板端再加载驱动则报错：

insmod: can't insert 'sys_config.ko': File exists
insmod: can't insert 'ot_osal.ko': File exists

直接执行./sample_snap 0，则报错：

[Func]:os08a20_write_register [Line]:123 [Info]:I2C_WRITE error!
[Func]:os08a20_default_reg_init [Line]:191 [Info]:write register failed!
[Func]:os08a20_write_register [Line]:123 [Info]:I2C_WRITE error!
[Func]:os08a20_linear_8m30_12bit_init [Line]:494 [Info]:os08a20 write register failed!
及[sample_comm_venc_get_venc_stream_proc]-2559: get venc stream time out, exit thread，

请问怎么操作才能运行sample的摄像头例程？