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Extension board
sabyasachi.paul
Join Date: 20 Aug 20
Posts: 6
Posted: Wed, 2020-09-16 04:25

Hi,

There are 2 GMSL camera ports on the RB5. Is it possible to mount an extension board on top of the RB5 in order to have 2 additional GMSL ports? Thanks a lot.

Best regards

Sabyasachi Paul

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mistry Moderator
Join Date: 18 Apr 18
Posts: 22
Posted: Wed, 2020-09-16 10:52

Hi Sabyasachi,

Current Vision Mezzanine included with the RB5 development kit uses all the CSI lines on High Speed connectors 1/2/3 and routes them to various cam connectors on the development kit. The GMSL ports are routed from the MAX9296A to CSI 4/5 on HS3. So there are two ways you can add more GMSL ports to the platform: 

  1. You can create an extension board and use a flex cable to connect to CAM1 or CAM2 connectors on the vision mezzanine. Unfortunately you cannot directly plug in the board to the HS1/2/3 connectors as the CSI lines are not pass through.
    OR
  2. You can remove the current Vision Mezzanine and create you own 96Boards compatible mezzanine with multiple GMSL ports. You can find more info and support on how to create your own Mezzanine here: https://www.96boards.org/documentation/mezzanine/ and you can find some templates here: https://github.com/96boards/mezzanine-community

I hope this helps.

Best Regards,

Rajan.

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sabyasachi.paul
Join Date: 20 Aug 20
Posts: 6
Posted: Thu, 2020-09-17 02:01

Hi Rajan,

Thanks for your response. Can you help us with the following:

1. Can you provide a list of GMSL supported cameras for the board?

2. Can we plug in another 4k camera to the Vision Mezzanine. So, the question is if the RB5 would be able to handle 2 4k camera streams? If so, do you have a link where we can order the same. I see 3 ports (CAM1, CAM2, CAM3). CAM1 and CAM2 are occupied by the 4k and the tracking camera. So the additional 4k camera can be plugged directly to the CAM3?

Thanks again. Looking forward to your reply.

Best regards

Sabyasachi 

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mistry Moderator
Join Date: 18 Apr 18
Posts: 22
Posted: Thu, 2020-09-17 21:42

Hi Sabyasachi,

The list of cameras that are supported can be found here:

https://developer.qualcomm.com/qualcomm-robotics-rb5-kit/software-reference-manual/camera-and-video/camera-capture-and-encode

Like you mentioned, Cam 1 and 2 ports are connected to onboard cameras. 
If you want to enable other CAM ports, you will need to make changes to device tree, and enable driver support if the camera you are using is not on the list above. 4k30 is ok on all 4 lane ports, 4K60 is currently enabled on one port of RB5 due to signal integrity issues at higher data rates. I believe the QRB5165 SOM can support multiple 4K60 cameras. 

Hope this helps.

Rajan.

 

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sabyasachi.paul
Join Date: 20 Aug 20
Posts: 6
Posted: Mon, 2020-09-21 08:03

Hi Rajan

Thanks for your reply. Can you point us to a link where to buy an additional Main Camera (IMX577) along with the connector to the Mezannine board?

Also, can you send us a link to the GMSL enabled camera (ON SEMI AR0231) along with the GMSL connector cable to the Mezannine board?

We could not find links specific to the connectors. Thanks a lot!

Best regards

Sabyasachi Paul

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Re: Extension board Best Answer
mistry Moderator
Join Date: 18 Apr 18
Posts: 22
Posted: Tue, 2020-09-22 08:25

Hi Sabyasachi,

Please reach out to Thundercomm to get the main IMX camera with the flex cable. They should be able to help you with getting additional camera's, cables and connector specs.

 For the GMSL camera, you can get part number LI-AR0231-GMSL2-CFM-176H-000 (no ISP) directly from Leopard Imaging. 

Hope this helps,

Best Regards,

Rajan.

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sabyasachi.paul
Join Date: 20 Aug 20
Posts: 6
Posted: Wed, 2020-09-23 01:17

Hi Rajan,

Thank you. This is helpful. Yes the main camera (IMX577) has a different MIPI interface on the Leopard Imaging website. I will contact Thundercomm then.

Best regards

Sabyasachi Paul

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