I am trying to record video from some analog cameras. I have the Jetson TX1 Development Kit connected to the ADV7280M over I2C. The first question is why I can not see the device on I2C. When I type

``````sudo i2cdetect -y -r 1
``````

I get

``````0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: UU -- UU UU -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- UU -- -- UU
``````

it should be on 41, 42 and 43.

Additionally I have seen that people have tried to use this video decoder with l4t, however it seems like the driver has to be configured differently. I wanted to ask if somebody got it to work with the Jetson TX1 or if somebody can point me into the right direction?

What you can do is probe the i2c signal to check what happened.

When I probe the SDA and SCL they both show high. Is that expected?

Please google “i2c waveform” to know what it could be. Please probe is and send i2c command to check. Suggest to use i2cget for your device.

Ok thank you for your help, I will check that out.

So instead of connecting it to I2C GP1 DAT/CLK 3v3 on connector J21 we decided to use CAM_SDA/SCL on connector J22 pin 75/77. We have a logic level converter to get the 1.8V to 3.3V for the ADV7280m. My first question would be on what I2C bus I should see the device? It is hard to follow to which bus of the 6 bus options the connectors are hooked up?

It’s i2c6