Steps to create a UVM driver 1. Create custom class inherited from uvm_driver, register with factory and call new 2. Declare virtual interface handle and get them in build phase 3. Code the run_phase UVM Driver-Sequencer handshake How are driver/sequencer API methods used ? 1.get_next...
// this driver supports a two-deep pipeline fork do_item(); do_item(); join endtask task do_item(); forever begin mbus_item req; lock.get(); seq_item_port.get(req); // Completes the sequencer-driver handshake accept_tr(req); // request bus, wait for grant, etc. begin_tr(req...
8. Driver Sequencer Handshake UVM Driver Sequencer Connection Using get_next_item() Using get() and put() 9. Reporting Infrastructure UVM Reporting Functions UVM Printer 10. UVM Config DB UVM Resource database UVM Config database UVM config_db examples ...
下图给出sequence,sequencer与driver的握手机制。 SequenceItem Flow in Pull Mode 从上图可以看出driver执行put response,而sequence执行get response,并且putresponse是非阻塞的,而get_response是阻塞的,这样就保证了sequence,sequencer与driver之间的handshake。 以上介绍了put/get_response最基本的功能,下面介绍...
UVM Driver-Sequencer handshake UVM driver is a parameterized class which can drive a specific type of transaction object. The driver has a TLM port of typeuvm_seq_item_pull_portwhich can accept the parameterizedrequestobject from theuvm_sequencer. It can also provide aresponseobject back to the...
The non-blocking item_done() method completes the driver-sequencer handshake and it should be called after a get_next_item() or a successful try_next_item() call. put The put() method is non-blocking and is used to place an RSP sequence_item in the sequencer. Writing Driver : 1. A...
The handshake between the sequence, sequencer and driver to send the sequence_item is given below. sequence driver communication Communication between the Sequence and driver involves below steps, 1.create_item() / create req. 2.wait_for_grant(). 3.randomize the req. 4.send the req. 5.wa...
task run(); // this driver supports a two-deep pipeline fork do_item(); do_item(); join endtask task do_item(); forever begin mbus_item req; lock.get(); seq_item_port.get(req); // Completes the sequencer-driver handshake accept_tr(req); // request bus, wait for grant, etc...
Sequencer sequence和它们的目标driver之间的req和rsp item的传输是通过在sequencer中实现的双向 TLM 通信机制来实现的。uvm_driver 类包含一个 uvm_seq_item_pull_port,它和sequencer中的 uvm_seq_item_pull_export。port和export类是sequence_items 类型参数化的。一旦建立了port和export连接,driver代码就可以使用expor...
virtual sequence是控制多个sequencer中激励生成的序列。由于sequence,sequencer和driver集中在单个接口上,因此几乎所有测试平台都需要virtual sequence来协调不同接口之间的激励和交互。virtual sequence在子系统或系统级别的测试台上也很有用,可以使单元级别的sequence以协调的方式运行。下图从概念上展示了这一点,其中virtual ...