Altera Avalon Verification IP Suite Bedienungsanleitung PDF herunterladen (Seite 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

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