调试Multi-camera参考的手册为VisionSDK_Linux_UserGuide.pdf和VisionSDK_UserGuide_TDA2Ex.pdf，sdk使用的是PROCESSOR_SDK_VISION_03_08_00_00版本，按照UserGuide步骤调试Multi-camera的时候发现调不通，相关步骤如下：
解串板如上图所示
SW3选择如上
启动选择 2: Multi-Camera LVDS Usecases
运行报错信息如下，
[HOST] [HOST ] 639.881809 s:
[HOST] [IPU2 ] 639.882175 s: CHAINS: ChainsCommon_MultiCam_StartCaptureDevice
[HOST] [IPU2 ] 639.882693 s: VIDEO_SENSOR: INST1 : I2C1 : I2C Addr = 0x38
[HOST] [IPU2 ] 640.206002 s: VIDEO_SENSOR: VIP 0: DRV ID 1205 (I2C ADDR 0x38): a635:0000:7fa2
[HOST] [IPU2 ] 640.206521 s: VIDEO_SENSOR: INST2 : I2C1 : I2C Addr = 0x39
[HOST] [IPU2 ] 640.965534 s: src/bsp_deviceI2c.c @ Line 386:
[HOST] [IPU2 ] 640.965656 s: I2C1: DEV 0x75: RD 0x01 ... ERROR !!!
[HOST] [IPU2 ] 640.965747 s: src/bsp_deviceI2c.c @ Line 412:
[HOST] [IPU2 ] 640.965839 s: I2C1: Error timeout 663 ms!!!
[HOST] [IPU2 ] 640.965961 s: src/bsputils_lvds.c @ Line 919:
[HOST] [IPU2 ] 640.966052 s: device address - 75 i2c error - -21
[HOST] [IPU2 ] 641.636399 s: src/bsp_deviceI2c.c @ Line 765:
[HOST] [IPU2 ] 641.636491 s: I2C1: DEV 0x39: RD 0x300a ... ERROR !!!
[HOST] [IPU2 ] 641.636613 s: src/bsp_deviceI2c.c @ Line 836:
[HOST] [IPU2 ] 641.636704 s: I2C1: Error timeout 665 ms!!!
[HOST] [IPU2 ] 641.637772 s: VIDEO_SENSOR: INST3 : I2C1 : I2C Addr = 0x3a
[HOST] [IPU2 ] 642.393125 s: src/bsp_deviceI2c.c @ Line 386:
[HOST] [IPU2 ] 642.393247 s: I2C1: DEV 0x76: RD 0x01 ... ERROR !!!
[HOST] [IPU2 ] 642.393338 s: src/bsp_deviceI2c.c @ Line 412:
[HOST] [IPU2 ] 642.393430 s: I2C1: Error timeout 659 ms!!!
[HOST] [IPU2 ] 642.393491 s: src/bsputils_lvds.c @ Line 919:
[HOST] [IPU2 ] 642.393582 s: device address - 76 i2c error - -21
[HOST] [IPU2 ] 643.058226 s: src/bsp_deviceI2c.c @ Line 765:
[HOST] [IPU2 ] 643.058317 s: I2C1: DEV 0x3a: RD 0x300a ... ERROR !!!
[HOST] [IPU2 ] 643.058409 s: src/bsp_deviceI2c.c @ Line 836:
[HOST] [IPU2 ] 643.058500 s: I2C1: Error timeout 660 ms!!!
[HOST] [IPU2 ] 643.059354 s: VIDEO_SENSOR: INST4 : I2C1 : I2C Addr = 0x3b
[HOST] [IPU2 ] 643.827243 s: src/bsp_deviceI2c.c @ Line 386:
[HOST] [IPU2 ] 643.827365 s: I2C1: DEV 0x77: RD 0x01 ... ERROR !!!
[HOST] [IPU2 ] 643.827456 s: src/bsp_deviceI2c.c @ Line 412:
[HOST] [IPU2 ] 643.827548 s: I2C1: Error timeout 672 ms!!!
[HOST] [IPU2 ] 643.827639 s: src/bsputils_lvds.c @ Line 919:
[HOST] [IPU2 ] 643.827731 s: device address - 77 i2c error - -21
[HOST] [IPU2 ] 644.504453 s: src/bsp_deviceI2c.c @ Line 765:
[HOST] [IPU2 ] 644.504544 s: I2C1: DEV 0x3b: RD 0x300a ... ERROR !!!
[HOST] [IPU2 ] 644.504666 s: src/bsp_deviceI2c.c @ Line 836:
[HOST] [IPU2 ] 644.504727 s: I2C1: Error timeout 672 ms!!!
[HOST] [IPU2 ] 644.505215 s: Assertion @ Line: 616 in /home/leon/PROCESSOR_SDK_VISION_03_08_00_00/vision_sdk/apps/src/rtos/video_sensor/src/vid_sensor.c: status == SYSTEM_LINK_STATUS_SOK : failed !!!
然而我在终端起来后，压根接没i2c -1这条总线
请问下这是什么原因导致的，或者我的Multi-camera DEMO板操作步骤上有没什么错误
