element14 Community
element14 Community
    Register Log In
  • Site
  • Search
  • Log In Register
  • Community Hub
    Community Hub
    • What's New on element14
    • Feedback and Support
    • Benefits of Membership
    • Personal Blogs
    • Members Area
    • Achievement Levels
  • Learn
    Learn
    • Ask an Expert
    • eBooks
    • element14 presents
    • Learning Center
    • Tech Spotlight
    • STEM Academy
    • Webinars, Training and Events
    • Learning Groups
  • Technologies
    Technologies
    • 3D Printing
    • FPGA
    • Industrial Automation
    • Internet of Things
    • Power & Energy
    • Sensors
    • Technology Groups
  • Challenges & Projects
    Challenges & Projects
    • Design Challenges
    • element14 presents Projects
    • Project14
    • Arduino Projects
    • Raspberry Pi Projects
    • Project Groups
  • Products
    Products
    • Arduino
    • Avnet Boards Community
    • Dev Tools
    • Manufacturers
    • Multicomp Pro
    • Product Groups
    • Raspberry Pi
    • RoadTests & Reviews
  • Store
    Store
    • Visit Your Store
    • Choose another store...
      • Europe
      •  Austria (German)
      •  Belgium (Dutch, French)
      •  Bulgaria (Bulgarian)
      •  Czech Republic (Czech)
      •  Denmark (Danish)
      •  Estonia (Estonian)
      •  Finland (Finnish)
      •  France (French)
      •  Germany (German)
      •  Hungary (Hungarian)
      •  Ireland
      •  Israel
      •  Italy (Italian)
      •  Latvia (Latvian)
      •  
      •  Lithuania (Lithuanian)
      •  Netherlands (Dutch)
      •  Norway (Norwegian)
      •  Poland (Polish)
      •  Portugal (Portuguese)
      •  Romania (Romanian)
      •  Russia (Russian)
      •  Slovakia (Slovak)
      •  Slovenia (Slovenian)
      •  Spain (Spanish)
      •  Sweden (Swedish)
      •  Switzerland(German, French)
      •  Turkey (Turkish)
      •  United Kingdom
      • Asia Pacific
      •  Australia
      •  China
      •  Hong Kong
      •  India
      •  Korea (Korean)
      •  Malaysia
      •  New Zealand
      •  Philippines
      •  Singapore
      •  Taiwan
      •  Thailand (Thai)
      • Americas
      •  Brazil (Portuguese)
      •  Canada
      •  Mexico (Spanish)
      •  United States
      Can't find the country/region you're looking for? Visit our export site or find a local distributor.
  • Translate
  • Profile
  • Settings
Avnet Boards Forums
  • Products
  • Dev Tools
  • Avnet Boards Community
  • Avnet Boards Forums
  • More
  • Cancel
Avnet Boards Forums
MiniZed Hardware Design PL DDR Memory Range
  • Forum
  • Documents
  • Members
  • Mentions
  • Sub-Groups
  • Tags
  • More
  • Cancel
  • New
Join Avnet Boards Forums to participate - click to join for free!
Actions
  • Share
  • More
  • Cancel
Forum Thread Details
  • State Suggested Answer
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 309 subscribers
  • Views 2483 views
  • Users 0 members are here
Related

PL DDR Memory Range

prateek.mohan1
prateek.mohan1 over 4 years ago

Hello, I am using a Zynq7000-SOC and am trying to put in a "AXI Central Direct Memory Access" block in the PL in order to move some data from DDR to DDR. Eventually I want to move data from PL to SRAM but I wanted to try DDR to DDR first just to see how it would work.

I have a block diagram like below:

image

 

So basically, the Zynq7000-SOC's M_AXI_GP0 port is connected to the "AXI Central Direct Memory Access" block (axi_cdma_0) for configuration of the DMA. I have the axi_cdma_0 connected to two different HP ports of the Zynq7000 - so I am using both S_AXI_HP0 and S_AXI_HP2.

 

I should mention that I am using the Minized platform from Avnet which has 512 MB of DDR. Now, when I go to the Address Editor, I see these addresses:

 

image

 

Now, I am using a BSP for Minized so I suppose it understands that only 512 MB of DDR exist because if I try to change the 'Master Base Address' of one of my ranges to above 0x1FFF_FFFF (for instance, I tried 0x2000_0000) I get this error:

 

image

 

I'm assuming this is because the address is above the 512 MB range. I was just wondering a few things

 

1. Is that assumption I made correct? Does it not allow me to go over the 0x1FFF_FFFF range because only 512 MB of DDR exist?

2. How does this play into the picture for the total address range accessible to me? The AXI_HP ports should also have access to OCM, but if OCM is mapped high I should be able to access the range 0xFFFC_0000 which won't be possible currently. I would get the error.

3. I saw the system table map mentioned in the Zynq TRM (UG585) and it shows that memory ranges for DDR go up to 0x3FFF_FFFF. What does this mean for the MiniZed? What is technically the max range I should be able to access through the PL?

image

4. Can I access the same memory location from PS and PL? For example, if I perform a DMA transaction to read data from address 0x1000_0000 - 0x1000_FFFF and write that data to address 0x1001_0000 - 0x1001_FFFF can I read address 0x1001_0000 from the PS and see the moved data?

 

Thanks for the help!

 

Prateek

  • Sign in to reply
  • Cancel
  • bhfletcher
    0 bhfletcher over 4 years ago

    Have you already taken the MiniZed Technical Training Courses? The Hardware course covers basic DMA in Labs 6 and 7, so I suggest you start there.

    http://avnet.me/E14_TTC

    Technical Training Courses

     

    Bryan

    • Cancel
    • Vote Up 0 Vote Down
    • Sign in to reply
    • Verify Answer
    • Reject Answer
    • Cancel
element14 Community

element14 is the first online community specifically for engineers. Connect with your peers and get expert answers to your questions.

  • Members
  • Learn
  • Technologies
  • Challenges & Projects
  • Products
  • Store
  • About Us
  • Feedback & Support
  • FAQs
  • Terms of Use
  • Privacy Policy
  • Legal and Copyright Notices
  • Sitemap
  • Cookies

An Avnet Company © 2025 Premier Farnell Limited. All Rights Reserved.

Premier Farnell Ltd, registered in England and Wales (no 00876412), registered office: Farnell House, Forge Lane, Leeds LS12 2NE.

ICP 备案号 10220084.

Follow element14

  • X
  • Facebook
  • linkedin
  • YouTube