I2c communication using i2c tools with MAX96712 on AGX ORIN

Autonomous Vehicles DRIVE AGX Orin DRIVE AGX Orin General
1

Please provide the following info (tick the boxes after creating this topic):
Software Version
DRIVE OS 6.0.8.1
DRIVE OS 6.0.6
DRIVE OS 6.0.5
DRIVE OS 6.0.4 (rev. 1)
DRIVE OS 6.0.4 SDK
other

Target Operating System
Linux
QNX
other

Hardware Platform
DRIVE AGX Orin Developer Kit (940-63710-0010-300)
DRIVE AGX Orin Developer Kit (940-63710-0010-200)
DRIVE AGX Orin Developer Kit (940-63710-0010-100)
DRIVE AGX Orin Developer Kit (940-63710-0010-D00)
DRIVE AGX Orin Developer Kit (940-63710-0010-C00)
DRIVE AGX Orin Developer Kit (not sure its number)
other

SDK Manager Version
1.9.3.10904
other

Host Machine Version
native Ubuntu Linux 20.04 Host installed with SDK Manager
native Ubuntu Linux 20.04 Host installed with DRIVE OS Docker Containers
native Ubuntu Linux 18.04 Host installed with DRIVE OS Docker Containers
other

Hello - I was just wondering how or if it is possible to communicate with the MAX96712 (and eventually the linked sensor in a running camera module). For example - when there is no sample application running, i2cdetect detects a device at address 0x29 (deserializer), but write will fail using i2cset. When a sample application with camera is attached i2cset -y -f 0 0x29 0x00 0x0d i (the device id) will work fine, but trying to read the bytes back using i2cget give ‘device busy’

Alternatively, I see character devices at /dev - for example /dev/cdi-dev.0.29

which I assume is bus 0, address 29. Can we talk to devices through that?

Otherwise, how does one use i2ctools to probe registers of connected devices - or is this even possible? Thanks!

3

I suspect there might be some power control to the deserializer triggered by the sample application. Could you provide details about the camera module you’re using and clarify the reason for needing to access the deserializer and the sensor?

4

I have used one of the Valeo - V1SIM728S2RU4120NB20_CPHY_x4 as well a a custom driver for a custom camera. So , I need a way to occasionally ping registers on various devices - ultimately the sensor, but I’ll start with the deserializer.

5

Please note that only the supported cameras listed in https://developer.nvidia.com/drive/ecosystem-hw-sw#cameras and https://developer.nvidia.com/drive/ecosystem-orin#cameracamera are recommended and any other camera modules development is out of the forum support scope. You should reach out to your nvidia representative for additional assistance.