由于driver和sequence中的sequence item指向的是同一个对象,因此可以通过item句柄在sequence内使用从driver返回的任何数据。换句话说,当一个 sequence_item 的句柄作为参数传递给 finish_item() 方法时,driver的 get_next_item() 方法拿到的 sequence_item 所指向的对象是同一个。当driver对 sequence_item 进行任何更...
/// DO NOT USE THIS PATTERN - Supplied as an example of what NOT to do/// Inside sequence_As body method//taskbody();// Initialise etcfork// The body code including other sequences and sequence_items// ...join_none endtask body;/// The body task exits immediately, in the controll...
task run_phase(uvm_phase phase); req_c req; forever begin get_next_item(req);// Item from sequence via sequencer fork begin //drive request toDUT which can take more clocks //separate threadthat doesn’t block sequence //driver can acceptmore items without waiting end join_none item_don...
(参考上一节工厂模式) $cast中的seq是uvm_sequence_base类型,多态。 4. 调用seq.start(), 执行body()函数的代码。 5. 只有使用default_sequence的方式启动,case0_sequence中starting_phase才不等于 null. (只摘取了与策略模式有关的 code)+: default_sequence的方式启动,会调用seq.start()函数来运行body()函...
classbus_itemextendsuvm_sequence_item;// Factory registration`uvm_object_utils(bus_item)// Properties - a selection of common types:rand int delay;rand logic[31:0]addr;rand op_code_enum op_code;string slave_name;rand logic[31:0]data[];bit response;functionnew(string name="bus_item");su...
() \`endif/*Remark 1:- this example shows two alternative approaches to handle local properties -When the define USE_FIELD_MACROS is set, the code is utilizing the uvm_field_xxx macrosto mark transaction fields as "uvm fields". Doing so automatically infers code which handlescompare,print,...
UVM TLM can_put Example Instead of directly trying to put a packet, the sender can first query to see if the receiver is ready or not with can_put function and then send the packet. class componentA extends uvm_component; `uvm_component_utils (componentA) // Rest of the code remains ...
1) 正如这个图片所展示的,UVM是除了DUT(待验证模块)的其他所有部分。其中,sequencer产生sequence(图上没画),sequence产生transaction。 transaction,类似于软件中的一个package。在硬件中,以一个transaction为单位进行传输,一个完整的transaction传输结束,才拉高或拉低电平。
在sequence item 的pool port讲:我们的我们的 driver 准备调用 get function。,在driver 实例化sequencer,当我们在顶层 讲 port 连接到export出口。注:从sequencer 发出的不是 对get 任务的调用,而是 反应正在 输出的事实 或者 是 提供 一个获取任务。所以 driver 就能够 调用 它。
`uvm_object_utils(adder_sequences); function new(string name="adder_sequences"); super.new(name); endfunction task body(); adder_transaction_item add_tx; repeat(2) begin add_tx = adder_transaction_item::type_id::create("add_tx"); start_item(add_tx); assert(add_tx.randomize()); ...