ic验证工作中如何使用UVM在平台中加入发数的总数?
时间: 2024-05-12 12:18:59 浏览: 96
在UVM中,可以使用uvm_analysis_port和uvm_analysis_imp来实现发数的总数统计。
首先,在UVM平台中创建一个新的类,用于跟踪发数的总数。该类应该具有一个公共函数,用于增加发数的总数,并且可以在其他组件中调用该函数。例如:
```systemverilog
class packet_counter;
int total_packets;
function void inc_total();
total_packets++;
endfunction
function int get_total();
return total_packets;
endfunction
endclass
```
然后,在发送端组件中,创建一个uvm_analysis_port,用于将发送的数据包传递给该类:
```systemverilog
class packet_sender extends uvm_component;
uvm_analysis_port#(packet) packet_port;
packet_counter counter;
function new(string name, uvm_component parent);
super.new(name, parent);
counter = new();
endfunction
task send_packet(packet pkt);
counter.inc_total();
packet_port.write(pkt);
endtask
endclass
```
最后,在接收端组件中,创建一个uvm_analysis_imp,用于接收发送的数据包,并在每次接收到数据包时更新发数的总数:
```systemverilog
class packet_receiver extends uvm_component;
uvm_analysis_imp#(packet) packet_imp;
packet_counter counter;
function new(string name, uvm_component parent);
super.new(name, parent);
counter = new();
packet_imp = new();
endfunction
function void build_phase(uvm_phase phase);
packet_imp.connect(counter.packet_port);
endfunction
function void write(packet pkt);
counter.inc_total();
// handle packet
endfunction
endclass
```
这样,在UVM平台中就可以跟踪发数的总数,并且可以在任何时候获取该总数。例如,可以在测试结束时输出发数的总数:
```systemverilog
packet_counter counter = new();
// create and connect components
run_test();
$display("Total packets sent: %0d", counter.get_total());
```
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