// Method1: using build-in start() method of sequence task run_phase(uvm_phase phase);sup...
可以看到我们前面经常提到的m_sequencer就是声明在这里的,也就是说到uvm_sequence_item这一层就已经绑定了uvm_seuqencer的概念了,也就是说uvm_sequence_item类型的transaction最终都会给到sequencer再到driver中,关于transaction从产生到driver获取的详细流程参见之前的文章:数字验证大头兵:[UVM源代码研究] sequence、 seq...
1:采用default_sequence的方式启动 2. 直接调用sequence的start()函数启动 3. 在virtual sequence中调用uvm_do宏启动sequence 下面梳理下default_sequence中策略模式的应用: 1. 将case0_sequence“挂载”到sequencer上。 2. uvm_sequence_base中的虚函数start()调用了pre/post_start(), pre/post_body(),以及body(...
在最简单的形式中,序列应该是 uvm_sequence 基类的派生,方法是指定请求和响应项类型参数,并使用要执行的特定方案实现 body 任务。 类usb_simple_sequence 扩展uvm_sequence #(usb_transfer); rand int unsigned sequence_length; constraint reasonable_seq_len { sequence_length < 10 }; //Constructor function ne...
UVM:SEQUENCE机制详解 从应用入手,最简单的seq机制使用方式如下: 其涉及5个基本组件或object:agent/driver/sequence/sequencer/item。 A、agent中完成driver和sequencer的连接:my_drv.seq_item_port.connect(my_seqr.seq_item_export); B、driver中调用seq_item_port的函数获取下个item、进行相应驱动后,结束当前item...
1.3.2. 方法二:手动启动sequence (更常用) taskmy_base_test::run_phase(uvm_phase phase);my0_seq m_seq = my0_seq::type_id::create("m_seq");super.run_phase(phase);phase.raise_objection(this);`uvm_info(get_type_name(),"< 005 > : run_phase ", UVM_DEBUG)// seq startm_seq.sta...
相应的sequence代码里是 start_item() 后跟一个 finish_item()。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_...
默认情况下,default_sequence是uvm_random_sequence Body Callbacks:uvm sequences有两种callback方法,pre_body和post_body(): These callbacks are called only when start_sequence() of sequencer or start() method of the sequence is called. Hierarchical sequences:To create a sequence using another sequence...
uvm_sequence_library uvm_sequence::req and rsp uvm_sequencer#()::get_next_item, try_next_item, item_done, get, peek, and putare now documented and official. Deprecated Features set/get_config_int, set/get_config_string, set/get_config_object ...
第二步需要override uvm_sequence_base类里的response_handler函数,实现自己对response任意处理的需求。它的原型为: // Function: response_handler // When the use_reponse_handler bit is set to 1, this virtual method is called // by the sequencer for each response that arrives for this sequence....