Results 1 to 2 of 2

Thread: HPS-FPGA Communication using mSGDMAs in memory-mapped mode

  1. #1
    Join Date
    Mar 2018
    Rep Power

    Question HPS-FPGA Communication using mSGDMAs in memory-mapped mode


    I'm trying to write some data from HPS to an on-chip memory and to rewrite them in a memory in HPS (from the on-chip memory).
    I'm using a SoCKit board.
    As a first step, in both cases, I'm using a mSGDMA (in memory-mapped to memory-mapped mode) for each direction, in order to read data from HPS and to write them to FPGA, and to read data from FPGA and to write them to HPS. In addiction, I'm not considering the use of any further processor (as Nios II).
    Unfortunately, I didn't find any C code to use as a reference.
    To understand the flow and how I should write the related C code, I started by the code provided at this link, where a streaming to memory-mapped mode (and vice versa) is considered for the mSGDMA.
    But I didn't understand which addresses I should consider to read/write the CSR and descriptor register (some address is missed).

    Could you suggest to me any reference code to read/write using mSGDMA or what addresses should be : ALT_LWFPGASLVS_OFST, READ_MSGDMA_DISP_CSR_BASE, WRITE_MSGDMA_DISP_CSR_BASE, MEMTEST_MEMTEST_CONTROLLER_BASE?

    Thank you in advance!

  2. #2
    Join Date
    Aug 2004
    Texas Y'all
    Rep Power

    Default Re: HPS-FPGA Communication using mSGDMAs in memory-mapped mode

    I would take a look at the baremetal code with this design example:

Similar Threads

  1. C++ template in memory-mapped master
    By BKN in forum C and C++
    Replies: 2
    Last Post: January 13th, 2018, 08:11 AM
  2. PCie BAR to memory mapped slave
    By sxmg92 in forum General Altera Discussion
    Replies: 1
    Last Post: April 17th, 2017, 02:27 PM
  3. avalon memory mapped slave
    By stehj_PowerCon in forum VHDL
    Replies: 3
    Last Post: July 22nd, 2015, 10:55 PM
  4. Memory mapped IO query
    By MCooper in forum VHDL
    Replies: 0
    Last Post: March 24th, 2013, 03:51 PM
  5. Verify failed on memory-mapped IO
    By LogicL in forum Nios Forum
    Replies: 1
    Last Post: August 4th, 2010, 11:31 PM

Tags for this Thread


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts