in UVM, how to change the description of instance coverage

To change the description of an instance coverage in UVM, you can use the set_inst_cov_description() function provided by the uvm_coverage class. This function takes two arguments: the name of the instance coverage and the new description string.

Here is an example code snippet:

uvm_coverage my_inst_cov;
string new_desc = "This is a new description for my instance coverage";

// Set the description of the instance coverage
my_inst_cov.set_inst_cov_description("my_inst_cov", new_desc);

This will update the description of the instance coverage named "my_inst_cov" to the new description string provided.

相关问题

in UVM, how to change the description of type coverage

To change the description of a type coverage in UVM, you can use the set_type_cov_description() function provided by the uvm_coverage class. This function takes two arguments: the name of the type coverage and the new description string.

Here is an example code snippet:

uvm_coverage my_type_cov;
string new_desc = "This is a new description for my type coverage";

// Set the description of the type coverage
my_type_cov.set_type_cov_description("my_type_cov", new_desc);

This will update the description of the type coverage named "my_type_cov" to the new description string provided.

uvm 如何写coverage

对于UVM的coverage，需要采用SystemVerilog的语言来进行编码。具体步骤如下：

1. 定义一个coverage model

首先需要定义一个coverage model，它描述了要覆盖的对象和覆盖的方式。通常，coverage model是在UVM中的一个类，它继承了uvm_coverage_model类。例如，你可能会定义一个名为“my_coverage_model”的类，代码如下：

class my_coverage_model extends uvm_coverage_model;

2. 定义一个coverage bin

然后，需要定义一个coverage bin，它描述了一个覆盖点的范围。例如，你可能会定义一个名为“my_coverage_bin”的类，代码如下：

class my_coverage_bin extends uvm_coverage_bin;

3. 在coverage model中添加coverage bins

在coverage model中添加coverage bins，以描述要覆盖的对象。例如，你可能会在“my_coverage_model”中添加一个叫做“my_coverage_bin”的coverage bin，代码如下：

my_coverage_bin my_bin;
...
function new(string name="my_coverage_model");
    super.new(name);
    my_bin = new;
    add_coverage_point(my_bin);
endfunction

4. 定义一个coverage group

然后，需要定义一个coverage group，它描述了一组相关的coverage bins。例如，你可能会定义一个名为“my_coverage_group”的类，代码如下：

class my_coverage_group extends uvm_coverage_group;

5. 在coverage group中添加coverage bins

在coverage group中添加coverage bins，以描述一组相关的覆盖点。例如，你可能会在“my_coverage_group”中添加一个叫做“my_coverage_bin”的coverage bin，代码如下：

my_coverage_bin my_bin;
...
function new(string name="my_coverage_group");
    super.new(name);
    my_bin = new;
    add_coverage_point(my_bin);
endfunction

6. 在coverage model中添加coverage group

最后，在coverage model中添加coverage group，以描述要覆盖的对象和覆盖的方式。例如，你可能会在“my_coverage_model”中添加一个叫做“my_coverage_group”的coverage group，代码如下：

my_coverage_group my_group;
...
function new(string name="my_coverage_model");
    super.new(name);
    my_group = new;
    add_coverage_point(my_group);
endfunction

通过以上步骤，就可以实现UVM的coverage。然后，你可以通过使用UVM的coverage API来收集覆盖率数据，并在仿真结束时生成覆盖率报告。