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TDA4VEN-Q1: Transmitting video streams between two TDA4VENs via PCIe

yangtian yi
Prodigy 70 points
Part Number: TDA4VEN-Q1
Other Parts Discussed in Thread: AM67A

Tool/software:

Hi TI experts，

We are trying to transmit video stream data between two TDA4VENs. We found a reference example in the official document below.

https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/06_02_00_21/exports/docs/vision_apps/docs/user_guide/APP_PCIE_VIDEO.html

However, this example does not fully align with our requirements. The example uses 3 EVM boards, but our usage scenario only involves 2. Additionally, this example is based on the Linux+RTOS SDK, whereas we will use the EdgeAI SDK due to other application requirements. Now, we have three questions that we hope to get answers and support for:
  1. Can this example be implemented in the EdgeAI SDK? We plan to use the 10.01 version of the AM67A EdgeAI SDK on TDA4VEN.
  2. Can this example be completed using only two EVM boards?
  3. What is the approximate latency of video transmission in the example?

Best,

Yangtian.Yi

  • 0
    TI__Genius 11540 points

    Hi Yangtian,

    This demo is descoped after sdk 6.2. We do not support this in our latest sdk. 

    yangtian yi said:
    Can this example be implemented in the EdgeAI SDK? We plan to use the 10.01 version of the AM67A EdgeAI SDK on TDA4VEN.

    1. No, capture node is part of rtos sdk and in EgdeAi SDK linux controls capture and display part, so we cannot use the demo on EdgeAI sdk.

    2. In general, you can use pcie to transfer data between 2 evm, this demo might not fit with 2 evm, you can refer to some pcie examples for that and create your applicaiton.

    I am looping in pcie expert for the examples.

    Regards,
    Gokul

  • +1 in reply to Gokul S
    TI__Guru 50613 points

    Hi Yangtian,

    As Gokul mentioned, the demo has been descoped for a while and we do not have support in the latest SDK, nor do we have support for TDA4VEN.

    Furthermore, the TDA4VEN EVM board from TI does not have support for EP-mode, although, SoC itself is capable of EP mode. Custom board will be required if wanting to test out an EP/RC example from Linux SDK.

    Regards,

    Takuma

  • 0 in reply to Takuma Fujiwara
    Prodigy 70 points

    Hi Takuma,

    We have been continuing our develop on the solution for image transmission between two TDA4 via PCIe. In your previous reply, you mentioned that the TDA4VEN EVM does not support the EP mode. Could you please specify which components are missing for this support?

    Regards,

    Yangtian

  • +1 in reply to yangtian yi
    TI__Guru 50613 points

    Hi Yangtian,

    As an example from the J784S4 EVM schematic file, there are some resistors that can be easily modified to change the PRSNT signal behavior of the PCIe port.

    TDA4VEN EVM does not have the disconnected DNI pads to allow the board modifications.

    Regards,

    Takuma