OTNframedelay

原创于 2014-10-29 23:54:27 发布 · 364 阅读

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本文介绍了一种OTN帧延时测试类的设计与实现过程，包括类的初始化、配置延时策略以及启动测试流程。通过构建堆栈、设置策略并启动测试，实现了对OTN帧延时的有效控制。

`ifndef OTNFrameDelay_sv
`define OTNFrameDelay_sv
class OTNFrameDelay extends BaseTest;
`uvm_component_utils(OTNFrameDelay)

local ProcessStack stack;
local OTNFramePolicy delay_policy;
protected rand int random_delay;
constraint constr_random_delay {random_delay>=100; random_delay<=2000;}

function new(string name = "", uvm_component parent = null);
super.new(name, parent);
endfunction

virtual function void start_of_simulation_phase(uvm_phase phase);
super.start_of_simulation_phase(phase);
if(!randomize())`uvm_fatal("RANDOMIZATION_ERROR", "Failed to generate delay");
`uvm_info("TEST_STATUS", $sformatf("delay: %0d frames", random_delay), UVM_NONE)
endfunction

virtual task main_phase(uvm_phase phase);
phase.raise_objection(this);

//construct a stack
stack = ProcessStack::construct("OTNFrame", getNode(GEN), getTransciever(GEN), ProcessStack::SRC);

//construct a policy
delay_policy = OTNFramePolicy::type_id::create("delay_policy");
//configure the policy;
delay_policy.setFrameCount(random_delay);

//add policy to stack
stack.add(delay_policy).finish();
//start stack in blocking mode
stack.start(phase, 1'b1);

phase.drop_objection(this);
endtask

endclass

`endif //OTNFrameDelay_sv

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`ifndef OTNFramePolicy_sv
`define OTNFramePolicy_sv

class OTNFramePolicy extends OTNPolicyBase;
`uvm_object_utils(OTNFramePolicy)

function new(string name = "");
super.new(name);
endfunction

function void execute(OTNFrame txn, ExecutionContext cntxt);
endfunction
endclass

`endif //OTNFramePolicy_sv