Altera Avalon Verification IP Suite - Manual (Page 158)

1–2 Chapter 1: SOPC Builder Tutorial
Verifying Avalon-MM Slave DUT
Avalon Verification IP Suite User Guide May 2011 Altera Corporation
Example 1–1 shows an excerpt from the test program that demonstrates the use of the
Avalon-MM Master API. Example 1–1 shows the following two tasks:
■ master_set_and_push_commands —Sets the fields of the command descriptor and
inserts it on to the command queue.
■ master_pop_and_get_response —Pops or removes the response received by the
Avalon-MM Master BFM.
As these tasks illustrates, use the set_command_<field> methods to define the
command and the push_command method to add the command to the queue. Use the
pop_response method to get a response and the get_response_<field> to retrieve
the fields of the response.
f For more information about the methods that the Avalon-MM Master BFM uses, refer
to the
“Application Program Interface” on page 1–9 in the Avalon Memory-Mapped
Master BFM.
1
Although this testbench is written in Verilog HDL, the Avalon Verification IP Suite
supports VHDL by providing wrappers for the Avalon-MM Master and Slave BFMs.
You can include the BFMs with wrappers in simulators that support mixed language
simulation. For more information, refer to
Chapter 2, Avalon-MM Master BFM with
Avalon-ST API Wrapper and Chapter 4, Avalon-MM Slave BFM with Avalon-ST API
Wrapper .
Example 1–1. Verilog Tasks Illustrating the Avalon-MM Master BFM API
//this task sets the command descriptor for master BFM and push it to the queue
task master_set_and_push_command;
// . . .
begin
`MSTR_BFM.set_command_request(request);
`MSTR_BFM.set_command_address(addr);
`MSTR_BFM.set_command_byte_enable(byte_enable,`INDEX_ZERO);
`MSTR_BFM.set_command_idle(idle, `INDEX_ZERO);
`MSTR_BFM.set_command_init_latency(init_latency);
if (request == REQ_WRITE)
begin
`MSTR_BFM.set_command_data(data, `INDEX_ZERO);
end
`MSTR_BFM.push_command();
end
endtask
//this task pops the response received by master BFM from queue
task master_pop_and_get_response;
// . . .
begin
`MSTR_BFM.pop_response();
request = Request_t' (`MSTR_BFM.get_response_request());
addr = `MSTR_BFM.get_response_address();
data = `MSTR_BFM.get_response_data(`INDEX_ZERO);
end
endtask