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xinren's avatar
xinren
Icon for New Contributor rankNew Contributor
2 years ago

altera msgdma

I am new to Altera and msgdma. We have an Altera Agilex development board where MSGDMA IP is added. I have a kernel mode driver to test the MSGDMA. There are two ways to set up descriptor, regular and extended. The current setting is regular. When I set up these four fields, src address, dest address, length, and GO. Nothing happens.

Question 1. anyone has a success in using regular descriptor?

Question 2. if it is memory to stream, what is the address for the write address (regular and/or extended descriptor)?

Question 3. If the answer of 1 is yes, then any additional setting(s) is needed for hardware and software?

Thanks in advance for your help.

Xinren

Sw Development

3 Replies

  • tehjingy_Altera's avatar
    tehjingy_Altera
    Icon for Regular Contributor rankRegular Contributor
    2 years ago

    Hi

    We sincerely apologize for the inconvenience caused by the delay in addressing your Forum queries. Due to an unexpected back-end issue in our system, your Forum cases, along with others, did not get through as intended. As a result, we have a backlog of cases that we are currently working through one by one.

    Please be assured that we are doing everything we can to resolve this issue as quickly as possible. However, this process will take some time, and we kindly ask for your patience and understanding during this period. The cases will be attended by AE shortly.

    We appreciate your patience and understanding, and we are committed to providing you with the best support possible.

    Thank you for your understanding.

    Back to your issue, I think the below example design will answer your question on the use of the DMA.

    FPGA-to-HPS Bridges Design Example | Intel

    You could take a look at the part where the application write and read pattern to the memory in line 628 of example_design.c file

    Regards

    Jingyang, Teh

  • tehjingy_Altera's avatar
    tehjingy_Altera
    Icon for Regular Contributor rankRegular Contributor
    2 years ago

    Hi


    Do you have any update on this case?

    Just notice that I did not attach the link to the example design.

    Edited my previous comment and now you are able to see it now.



    Regards

    Jingyang, Teh


  • tehjingy_Altera's avatar
    tehjingy_Altera
    Icon for Regular Contributor rankRegular Contributor
    2 years ago

    Hi


    As we do not receive any response from you on the previous question/reply/answer that we have provided. Please login to ‘https://supporttickets.intel.com/s/?language=en_US’, view details of the desire request, and post a feed/response within the next 15 days to allow me to continue to support you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you on your follow-up questions.


    Regards

    Jingyang, Teh