Hassan

I have used these 3 attributes in a process but it seems that Quartus synthesis does not support any of them at all. It just gives error “predefined attribute … is not supported”

p_assert_generics: process
begin

report p_assert_generics’simple_name severity warning;
report p_assert_generics’instance_name severity warning;…[Read more]

I can see that the scripts use the explicit name of the file for analyze and run_test TCL commands. However, it is also possible to just do a file search and with the filenames in a list, iterate over the list and call analyze or run_test for each of them.

Why isn’t it done in this way?

Also, I was expecting to see a whole lot of commands that…[Read more]

When OSVVM is compiling files, I get a whole lot of messages like this:

# QuestaSim-64 vcom 10.6c Compiler 2017.07 Jul 26 2017
# Start time: 23:57:14 on Jun 06,2024
# vcom -2008 -work osvvm_cosim ../OsvvmLibraries/CoSim/src/CoSimInterruptHandler.vhd
# — Loading package STANDARD
# — Loading package TEXTIO
# — Loading package std_logic_1164
# –…[Read more]

The functions that are used to perform interface transactions and directive transactions are quite flexible and numerous. They include blocking and non-blocking calls aka asynchronous. These applies to the manager and subordinate, both read and write and also check functions.

Why is there need to have both blocking and non-blocking function…[Read more]

The MIT document for streaming and address mapped interfaces states this: “One of the challenges of using a single record, such as AddressBusRecType, as an interface is dealing with multiple drivers on each record element. OSVVM does this giving each element a resolved type, such as bit_max, std_logic_vector_max_c, integer_max, time_max, and…[Read more]

The scoreboards can contain tags for “out of order” transactions and can also drop transactions. This makes them more sophisticated then mere FIFOs. But what more features could they be given when you say “There is a long term plan to give users more direct control of the output of scoreboards.”

This code confused me and is found in the AXI4 manager source:

— Initialize DelayCoverage Models
AddBins (WriteAddressDelayCov.BurstLengthCov, GenBin(2,10,1)) ;
AddBins (WriteAddressDelayCov.BeatDelayCov, GenBin(0)) ;
AddBins (WriteAddressDelayCov.BurstDelayCov, GenBin(2,5,1)) ;

…

— Valid Delay between…[Read more]

That means normally we would not need to use Alert, but only the Affirm functions?

By the way, I did attend your course on OSVVM many years ago, before COVID. I was quite unwell in that week when I attended and could not absord the finer points. I had one more colleague with me. That colleague left a few wekks later and a redundancy drive a few…[Read more]

I understand that all of these are basically FIFOs. The term “scoreboard” need not confuse oneself.

The AXI4Manager source code contains these lines in the architecture declaration part:

signal WriteAddressFifo : osvvm.ScoreboardPkg_slv.ScoreboardIDType ;
signal WriteDataFifo : osvvm.ScoreboardPkg_slv.ScoreboardIDType ;

signal ReadAddressFifo : osvvm.ScoreboardPkg_slv.ScoreboardIDType ;
signal…[Read more]

It seems that so many IDs are needed to create a hierarchical output for difference aspects of the BFM in the test result report.

What is the primary benefit of this thread since the synthesis tool vendors will take maybe a decador or more to add simple new features for the language.

We need an effort to upgrade the flow that is used with VHDL. We need something like LLVM for VHDL. The netlist fitter can be handled by the tools. But tool for synthesis and compilation for…[Read more]

The AXI4Manager source code contains these lines in the architecture declaration part:

signal WriteAddressFifo : osvvm.ScoreboardPkg_slv.ScoreboardIDType ;
signal WriteDataFifo : osvvm.ScoreboardPkg_slv.ScoreboardIDType ;

signal ReadAddressFifo : osvvm.ScoreboardPkg_slv.ScoreboardIDType ;
signal…[Read more]

OSVVM can generate a lot of test reports at end of a test, I believe the EndOfTestReports exists for this purpose.

Is this feature compatible with VUnit or does it require specific OSVVM scripts and script commands to be run before those design reports can be created?

The TbAXI4.vhd contains AXI4 Manager and Subordinate along with the Test controller/sequencer called TestCtrl. It also contains clock and reset source.

There is one more thing called Axi4Monitor. I found a source file called Axi4Monitor_dummy.vhd which has an entity but empty architecture. Does this mean that the monitor module is not yet…[Read more]