in UVM, how to change the description of type coverage
时间: 2024-03-01 17:53:51 浏览: 18
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.
相关问题
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.
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:
```systemverilog
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:
```systemverilog
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:
```systemverilog
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:
```systemverilog
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:
```systemverilog
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:
```systemverilog
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。