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OKris1's avatar
OKris1
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6 years ago

How to set QSYS component base address through VHDL generics

Hi. I am new to QSYS and VHDL, so i am still learning. I have created a VHDL code and simulated it in MODELSIM = it works fine, as it should I have then wrapped it into an avalon MM interface and cr...
OKris1's avatar
OKris1
Icon for New Contributor rankNew Contributor
6 years ago
Hi Anand My custom VHDL code is a basic 2's complement calculator (which for the moment only do multiplication) It has AVALON MM slave interface with 3 registers which are two for input value and one output register for multiplication result When I set a generic value called base_address the first register is given this address, and the second is given base_address+1 and the next one is given base_address+2 I am ot sure if I understand the base column in QSYS system contents tab, but I thought this was the same thing = base_address? When I use Assign Base address from system menu all my QSYS components are given a sequenctially logic address span that do not conflict, but I dont understand how my CUSTOM MADE qsys COMPONENT addressable registers are related to the BASE value in QSYS system contents? Br Øystein ------ Original Melding ------ Fra: "Intel Forums" <supportreplies@intel.com> Til: "oystein.kristiansen@embida.no" <oystein.kristiansen@embida.no> Sendt: 29.05.2019 04.15.07 Emne: AnandRS answered you: How to set QSYS component base address through VHDL generics
AnandRaj_S_Intel's avatar
AnandRaj_S_Intel
Icon for Regular Contributor rankRegular Contributor
6 years ago

NO,

Let me explain with example:

  1. Let us say we have a 2 custom component namely A & B.
  2. The Qsys system assign the base address & address span for the component.(A=0x0000 b =0x000F) base of A=0x0000 b=0x000F and address span for component A=0x000 to 0x000E.
  3. In component A hdl we have a case statement when "01" => Z <= X; 01 is address =offset address.Now data is stored in base address of the component + offset address =0x0001.

To have better understanding go through course like Using the Nios II Processor: Hardware Development,Using the Nios II Processor: Software Development & Using the Nios II Processor: Custom Components and Instructions

https://www.intel.com/content/www/us/en/programmable/support/training/catalog.html

Regards

ANAND