写一个UVM的验证平台
时间: 2023-02-13 12:51:29 浏览: 29
UVM(Universal Verification Methodology)是一种用于电子设计验证的开源方法论。它旨在提供一组统一的工具和流程,帮助设计人员更快地开发和重用验证代码。
要创建一个UVM验证平台,需要以下步骤:
安装UVM库。在开始使用UVM之前,需要安装UVM库,这是一组预先定义的类和函数,可用于创建验证环境。
创建验证模型。验证模型是指您要验证的电子设计的模拟版本。这可以是单个组件,也可以是多个组件的系统。
创建验证设计。验证设计是指将验证模型与UVM库结合起来的代码。这包括创建验证器、测试套件和测试用例。
执行测试。使用验证设计的代码,执行测试以检查电子设计的性能和功能。
分析测试结果。检查测试结果,确定是否存在错误或问题,并确定如何解决这些问题。
相关问题
给我写一个uvm验证平台
以下是一个简单的UVM验证平台示例:
- 创建一个UVM测试环境类(testbench),该类将包含所有UVM组件,并提供测试所需的接口和配置信息。
class my_testbench extends uvm_env;
`uvm_component_utils(my_testbench)
// Define interface signals and configurations
// ...
// Define UVM components
my_agent m_agent;
my_driver m_driver;
my_monitor m_monitor;
my_scoreboard m_scoreboard;
// Define UVM sequences and sequences library
my_sequence_lib m_sequence_lib;
function new(string name, uvm_component parent);
super.new(name, parent);
endfunction
function void build_phase(uvm_phase phase);
super.build_phase(phase);
m_agent = my_agent::type_id::create("m_agent", this);
m_driver = my_driver::type_id::create("m_driver", this);
m_monitor = my_monitor::type_id::create("m_monitor", this);
m_scoreboard = my_scoreboard::type_id::create("m_scoreboard", this);
m_sequence_lib = my_sequence_lib::type_id::create("m_sequence_lib", this);
endfunction
function void connect_phase(uvm_phase phase);
super.connect_phase(phase);
// Connect UVM components
m_driver.seq_item_port.connect(m_agent.seq_item_export);
m_monitor.analysis_port.connect(m_agent.analysis_export);
m_scoreboard.reference_port.connect(m_monitor.monitor_export);
endfunction
virtual function void run_phase(uvm_phase phase);
super.run_phase(phase);
m_sequence_lib.run_sequence();
endfunction
endclass
- 创建一个UVM代理(agent)类,该类将实现将数据传输到DUT和从DUT接收数据的功能。
class my_agent extends uvm_agent;
`uvm_component_utils(my_agent)
// Define interface signals and configurations
// ...
// Define UVM components
my_sequencer m_sequencer;
function new(string name, uvm_component parent);
super.new(name, parent);
endfunction
function void build_phase(uvm_phase phase);
super.build_phase(phase);
m_sequencer = my_sequencer::type_id::create("m_sequencer", this);
endfunction
virtual function void connect_phase(uvm_phase phase);
super.connect_phase(phase);
// Connect UVM components
m_sequencer.seq_item_port.connect(seq_item_export);
endfunction
endclass
- 创建一个UVM驱动(driver)类,该类将向DUT发送数据。
class my_driver extends uvm_driver;
`uvm_component_utils(my_driver)
// Define interface signals and configurations
// ...
function new(string name, uvm_component parent);
super.new(name, parent);
endfunction
virtual task run_phase(uvm_phase phase);
super.run_phase(phase);
forever begin
seq_item_port.get_next_item(req);
send_req_to_dut();
seq_item_port.item_done();
end
endtask
endclass
- 创建一个UVM监视器(monitor)类,该类将从DUT接收数据。
class my_monitor extends uvm_monitor;
`uvm_component_utils(my_monitor)
// Define interface signals and configurations
// ...
function new(string name, uvm_component parent);
super.new(name, parent);
endfunction
virtual task run_phase(uvm_phase phase);
super.run_phase(phase);
forever begin
wait_for_dut_data();
pass_data_to_scoreboard();
end
endtask
endclass
- 创建一个UVM评分板(scoreboard)类,该类将比较从驱动程序发送的数据和从监视器接收的数据,以确认DUT是否按预期工作。
class my_scoreboard extends uvm_scoreboard;
`uvm_component_utils(my_scoreboard)
// Define interface signals and configurations
// ...
function new(string name, uvm_component parent);
super.new(name, parent);
endfunction
virtual function void compare(ref_item, dut_item, ...);
// Compare reference and DUT data
// ...
endfunction
endclass
- 创建UVM序列(sequence)类和UVM序列库(sequence library)类,以定义测试序列并将其添加到测试环境中。
class my_sequence extends uvm_sequence;
`uvm_object_param_utils(my_sequence)
// Define sequence items and data
// ...
function new(string name = "my_sequence");
super.new(name);
endfunction
virtual task body();
// Define test sequence
// ...
endtask
endclass
class my_sequence_lib extends uvm_sequence_library;
`uvm_component_utils(my_sequence_lib)
// Define test sequences
my_sequence m_test_sequence;
function new(string name, uvm_component parent);
super.new(name, parent);
endfunction
function void build_phase(uvm_phase phase);
super.build_phase(phase);
m_test_sequence = my_sequence::type_id::create("m_test_sequence");
m_test_sequence.set_sequence_state(uvm_sequence_base::is_auto_item);
endfunction
function void run_sequence();
m_test_sequence.start(m_sequencer);
m_test_sequence.wait_for_sequence_state(UVM_FINISHED);
endfunction
endclass
- 在UVM测试中使用这些组件,创建一个UVM测试(test)类并运行它。
class my_test extends uvm_test;
`uvm_component_utils(my_test)
my_testbench m_testbench;
function new(string name, uvm_component parent);
super.new(name, parent);
endfunction
virtual function void build_phase(uvm_phase phase);
super.build_phase(phase);
m_testbench = my_testbench::type_id::create("m_testbench", this);
endfunction
virtual task run_phase(uvm_phase phase);
super.run_phase(phase);
// Run testbench
m_testbench.run_phase(phase);
endtask
endclass
module top;
initial begin
uvm_config_db#(uvm_object_wrapper)::set(null, "uvm_test_top", "test", my_test::type_id::get());
run_test();
end
endmodule
帮我写一个UVM验证环境
以下是一个简单的UVM验证环境的示例代码,其中包括了一个简单的DUT和一个简单的测试:
`include "uvm_macros.svh"
class my_dut extends uvm_component;
// DUT代码
endclass
class my_test extends uvm_test;
`uvm_component_param_utils(my_test)
my_dut dut;
function new(string name, uvm_component parent);
super.new(name, parent);
endfunction
virtual task run_phase(uvm_phase phase);
// 在run_phase中执行测试
// 这里可以写一些testbench代码,比如产生测试向量,发送到DUT等等
endtask
endclass
class my_env extends uvm_env;
`uvm_component_param_utils(my_env)
my_dut dut;
my_test test;
function new(string name, uvm_component parent);
super.new(name, parent);
endfunction
virtual function void build_phase(uvm_phase phase);
// 在build_phase中创建DUT和test
dut = my_dut::type_id::create("dut", this);
test = my_test::type_id::create("test", this);
endfunction
virtual function void connect_phase(uvm_phase phase);
// 在connect_phase中连接DUT和test
test.dut = dut;
endfunction
virtual task run_phase(uvm_phase phase);
// 在run_phase中启动测试
test.start();
endtask
endclass
class my_top extends uvm_env;
`uvm_component_param_utils(my_top)
my_env env;
function new(string name, uvm_component parent);
super.new(name, parent);
endfunction
virtual function void build_phase(uvm_phase phase);
// 在build_phase中创建env
env = my_env::type_id::create("env", this);
endfunction
virtual task run_phase(uvm_phase phase);
// 在run_phase中运行env
env.run_phase(phase);
endtask
endclass
module tb;
my_top top;
initial begin
uvm_config_db#(virtual my_test)::set(null, "*", "default_test", my_test::type_id::get());
uvm_config_db#(virtual my_env)::set(null, "*", "default_env", my_env::type_id::get());
top = my_top::type_id::create("top", null);
run_test();
end
endmodule
这个示例中,我们创建了一个名为my_dut
的DUT和一个名为my_test
的测试,然后在my_env
中连接它们,最后在my_top
中运行my_env
。在tb
模块中,我们将默认的测试和环境设置为my_test
和my_env
,并且创建了my_top
实例并运行测试。
当然,这只是一个简单的示例,实际中的UVM验证环境可能会更加复杂,包含更多的组件和功能。但是这个示例可以帮助您了解基本的UVM验证环境创建过程。