Avalon Verification IP Suite: User Guide

ID 683439
Date 2/17/2022
Public

A newer version of this document is available. Customers should click here to go to the newest version.

Document Table of Contents

18.2. About the Test

The test flow includes the following steps:
  1. The test program initializes the BFMs.
  2. The test program runs the following three parallel processes:
    1. Process 1 creates and sends four test transactions to the source BFM. The transactions consist of the following six Avalon-ST signals: data, channel, error, empty, startofpacket, endofpacket, and idle. The Avalon-ST Source BFM drives the transactions to the Avalon-ST Single-Clock FIFO buffer. In addition, the Avalon-ST Source BFM keeps a local copy of the transactions for future reference. The Avalon-ST Source BFM prints the transaction values in the ModelSim transcript console.
    2. Process 2 controls the Avalon-ST Sink BFM. When the Avalon-ST Sink BFM receives a transaction, it completes the following steps:
      • It reads the transaction values.
      • It prints the transaction values on the ModelSim transcript console.
      • It compares the values it receives to the values from the Avalon-ST Source BFM.
      • It reports any mismatch in values as failures.
      • During this process, the Avalon-ST Sink BFM backpressures the Avalon-ST Single-Clock FIFO buffer.
    3. Process 3 measures the response latency when the Avalon-ST Single-Clock FIFO buffer backpressures the Avalon-ST Source BFM. The Avalon-ST Source BFM prints the transaction values on the ModelSim transcript console.
  3. The parallel processes terminate when the Avalon-ST Source and Sink BFM transaction queues are empty and all four transactions are complete.
  4. The test program prints a pass or fail message in the ModelSim transcript console. The test passes if the following condition is met: All transactions the Source BFM sends to the Single-Clock FIFO buffer match the transactions received by the Sink BFM.