Altera Mentor Verification IP Altera Edition AMBA AXI4-Stream - Manual (Page 26)

Mentor Verification IP AE AMBA AXI4-Stream User Guide, V10.3 26
SystemVerilog API Overview
Executing Transactions
April 2014
Example 2-4. Master BFM Test Program Transaction Creation
// Define a variable trans of type axi4stream_transaction to hold
// master transaction record
axi4stream_transaction trans;
...
// Create master transaction with 10 transfers
trans = bfm.create_master_transaction(10);
Example 2-5 shows a slave BFM test program creating a slave transaction.
Example 2-5. Slave BFM Test Program Transaction Creation
// Define a variable trans of type axi4stream_transaction to hold
// slave transaction record
axi4stream_transaction trans;
...
// Create a slave transaction
trans = bfm.create_slave_transaction();
Executing Transactions
Executing a transaction in a master/slave BFM test program initiates the transaction onto the
protocol signals. Each master/slave BFM API has execution tasks that push transactions into the
BFM internal transaction queues.
Figure 2-1 on page 21 illustrates the internal BFM structure.
execute_transaction()
If the DUT is a slave, then the execute_transaction() task is called in the master BFM test
program.
Example 2-6 shows a master test program executing a master transaction.
Example 2-6. Master Test Program Transaction Execution
// Define a variable trans of type axi4stream_transaction to hold the
// master transaction record.
axi4stream_transaction trans;
...
// Create a master transaction with 10 transfers.
trans = bfm.create_master_transaction(10);
...
// By default the execution of a transaction will block.
bfm.execute_transaction(trans);