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DRA821U: Clarification on CAN, UART, and Ethernet Driver Support for Jacinto 7 DRA821

sarthak sharma
Prodigy 100 points
Part Number: DRA821U
Other Parts Discussed in Thread: DRA821

Tool/software:

Dear TI Team,

I recently purchased the Jacinto 7 DRA821 evaluation board, and I'm currently exploring its capabilities. I understand that the TI team may have tested some of the key drivers as part of the validation process, and I’d appreciate your guidance on a few specific areas.

Could you please help clarify the following:

  1. Were the CAN, UART, and Ethernet drivers validated as part of your internal testing?

  2. Are there any logs, documentation, or reports available that detail the scope of this testing?

  3. What is the recommended procedure to enable and verify these drivers using the provided SDK (RTOS or Linux)?

  4. Are all physical ports for CAN, UART, and Ethernet accessible by default on the EVM, or is additional configuration required?

I’d appreciate any relevant documentation or pointers that could help accelerate my setup and testing process.

Thank you for your time and support.

Regards,

Sarthak Sharma

  • 0
    TI__Guru 67220 points

    Hi, 

    TI delivering various SDK packages as RTOS & Linux SDKS. 

    Please refer to SDK Documentation for more details. 

    EVM will not terminate all UART & CAN Instances as pins are multiplexed for other features. 

    Schematics also available in EVM page for your reference. 

    Please refer to SDK documentation and get back to us if you have any specific queries. 

    Best Regards, 

    Sudheer

  • 0
    Prodigy 100 points

    Dear Sudheer,

    Thank you for the valuable information provided.

    I have successfully set up the Linux SDK packages and built the Yocto image for the J7200-EVM board by following the steps outlined in the Texas Instruments documentation (https://downloads.ti.com/jacinto7/esd/processor-sdk-linux-j7200/09_02_00_04/exports/docs/linux/Overview_Building_the_SDK.html). The resulting .wic image was used to boot Linux, and the system booted successfully.

    However, I am encountering an issue where USB devices connected to the J6 connector on the board are not appearing in the /dev directory as ttyUSB0 or ttyUSB1. Could this be due to the USB driver being disabled by default in the TI SDK? If so, could you please advise on the steps to enable the USB driver to ensure proper detection of the connected USB devices?

    Thank you for your assistance.

    Regards,

    Sarthak

  • 0 in reply to sarthak sharma
    Prodigy 100 points

    Problem Statement:
    We are working on enabling the USB 2.0 interface on a TI board. Currently, the USB interface is not functioning as expected, and we are unable to achieve the desired output.

    Observations:
    Upon investigation, we found that the integrated circuits (ICs) U5 and U103, identified as TPD3S014DBVR, have their enable pins (Pin 3) in a low state. As a result, there is no output on Pin 4 of these ICs, which we suspect is preventing the USB 2.0 interface from operating correctly.


    Could you please confirm the correct method to enable Pin 3 of the TPD3S014DBVR IC to ensure proper operation? Specifically, we would like guidance on the following:


    Thanks,
    Sarthak




  • 0 in reply to sarthak sharma
    TI__Guru 67220 points

    Hi,

    USB1_DN3_PE will control the enable of "TPD3S014DBVR", which is controlled by "TUSB4041IPAPR" USB Hub.
    Please create a new thread related to USB queries if any.

    Best Regards,
    Sudheer