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Output not correct of Sampling Module1 #6

Open mobeen10x opened 10 months ago

mobeen10x commented 10 months ago

Issue Title

The 74th and last output of Sampling Module1 is not correct.

Description

Problem Description

During Testing of Sampling Module 1 74th and last output is not correct all remaining 142 outputs are correct.

Expected Behavior

DUT output should be match with Reference Model Output because all other 142 outputs are same with Reference Model.

Current Behavior

74th Output is 'hffff for all inputs and last output is not 'hffff but incorrect.

Reproduction Steps

  1. Clone this Repo https://github.com/mobeen10x/10xcelerator/tree/verif/verif/Sampling_Module1_verif_env
  2. In Repo Folder Run make rerun

Output of Environment

After Running make rerun output.txt file will be updated and the Output of Verification Environment will be in it. You can search for Test: Fail! Both Failed tests will be highlighted with Drived 4x4 matrix.

Environment Details

Verification Environment is Driving Stimulus to Module and then Comparing DUT Results with Results of Reference Model in Scoreboard.

Requirements For Simulation

UVM Enabled Simulator is Required I am Using Synopsys VCS Version L-2016.06_Full64

mobeen10x commented 9 months ago

edited **

After knowing more about bugs :

Issue Title

Issue Title: Incorrect Output in Sampling Module1

Problem Description

During the testing of Sampling Module1, the 74th and last output do not match the expected results. Specifically, the 74th output consistently shows 'hffff' for all inputs, and the last output is also incorrect.

Expected Behavior

The output of the DUT (Design Under Test) should match the Reference Model Output. This discrepancy in the 74th and last output is unexpected, as all other 142 outputs match the Reference Model.

Reasons Behind the 74th value Error

The issue appears to be related to the typo error.


'd004: Output_Pixel <= (Latch_Buffer[288+04] + Latch_Buffer[288+05] + Latch_Buffer[288+28] + Latch_Buffer[288+29]) /4;( design code line number 223)

in the place of assigning the 74th value there is a typo, So for the 74th value output is hffff because the default value of the case is hffff.

Possible Solutions

To resolve this issue, you can consider the following possible solutions: Replace the upper code of the line with 

'd074: Output_Pixel <= (Latch_Buffer[288+04] + Latch_Buffer[288+05] + Latch_Buffer[288+28] + Latch_Buffer[288+29]) /4;

Reasons Behind the Last Value Error

The issue appears to be related to Input_Buffer not getting the last value of the input matrix.


if (Input_Counter == 575)
begin
    Flag_Input_Buffer_Filled <= 'b1;
end
else if (Input_Counter < 575)
begin
    Input_Buffer[Input_Counter] <= Input_Pixel;
    Input_Counter <= Input_Counter + 1;
end

Here 575th input is never going to be registered in buffer.

Possible Solutions

To resolve this issue, you can consider the following possible solutions: Replace the upper code of the line with

         if (Input_Counter <  576)
            begin
                Input_Buffer[Input_Counter] <= Input_Pixel;
                Input_Counter <= Input_Counter + 1;
                if(Input_Counter == 575)
                begin 
                  Flag_Input_Buffer_Filled <= 'b1;
                end 
            end
        end

Reproduction Steps

To reproduce this issue, follow these steps:

  1. Clone this repository: https://github.com/mobeen10x/10xcelerator/tree/verif/verif/Sampling_Module1_verif_env
  2. In the repository folder, run the command make rerun.

Current Behavior

The 74th output consistently displays 'hffff' for all inputs, and the last output is incorrect.

Output of Environment

After running make rerun, the output.txt file will be updated with the output of the Verification Environment. You can search for Test: Fail! in this file, and both failed tests will be highlighted with a Driven 4x4 matrix.

Environment Details

The Verification Environment is responsible for driving stimulus to the Module and then comparing the DUT Results with the Results of the Reference Model in the Scoreboard.

Requirements For Simulation

To simulate this environment, you will need a UVM-enabled simulator. The author used Synopsys VCS Version L-2016.06_Full64 for this verification.

quswarabid commented 9 months ago

Please file the second issue separately.