A signal changes after 100ps after the clocking block event through an output synchronous drive. I observe a different behavior while running it with two EDA simulators. With the first simulator, the clocking block outputaacts on the second posedge, with the signal changing on the second falling...
Syntax [default]clocking[identifier_name]@[event_or_identifier]defaultinput#[delay_or_edge]output#[delay_or_edge][list of signals]endclocking delay_value表示要采样或驱动信号的时钟时间的时间单位的偏差。如果未指定偏斜,则将在指定事件后对所有输入信号进行采样并驱动输出符号。default#1step0ns clockingckb ...
可以通过时钟块名称直接访问时钟块的时钟事件,如 @(cb) 等于@(posedge clk).可以通过用 时钟块名字和 (.) 操作符俩访问时钟块的各个信号,所有的event都会同步到时钟块。 以下是同步语句的一些示例: // Wait for the next change of Data signal from the cb clocking block @(cb.Data); // Wait for pos...
接口模块将具有不同的时钟模块声明,就像之前一样,每个声明具有不同的输入偏差。 interface_if (inputbitclk);logic[3:0] gnt;clockingcb_0 @(posedgeclk);input#0gnt;endclockingclockingcb_1 @(posedgeclk);input#1step gnt;endclockingclockingcb_2 @(posedgeclk);input#1gnt;endclockingclockingcb_3 @(posed...
目前这个工程还是很简单,以后要加上clocking block,覆盖率,随机化等部分,有时间了弄吧,现在其它要办的事还不少。 对了跑是在questasim里跑的,以后弄UVM了再在虚拟机里跑。 1.env部分 env `include "transaction.sv" `include "generator.sv" `include "driver.sv" ...
SystemVerilog Clocking Block Prev: Introduction|Next: Multiple clocks Input and Output Skew A skew number for an input denotes when that input is sampledbeforethe clocking event (such as posedge or negedge) occurs. For an output, it is just the opposite - it denotes when an output is ...
This would allow test writers to focus more on transactions rather than worry about when a signal will interact with respect to a clock. A testbench can have many clocking blocks, but only one block per clock. Syntax [default] clocking [identifier_name] @ [event_or_identifier] ...
//monitor clocking block clocking monitor_cb @(posedge clk); default input #1 output #1; input addr; input wr_en; input rd_en; input wdata; input rdata; endclocking 指定方向 //driver modport modport DRIVER (clocking driver_cb,input clk,reset); ...
interface中clocking block的用处? 一下clocking block的基本用途。 clocking block比较有用的地方是在防止同步信号的竞... systemverilog的event regions。 2017-09-26 回答者: 聪明的康师... 猜你关注广告 1神戒礼包 2维普查重官网 3室内装修 dr钻戒官网 渣浆泵 武动苍穹 七战官网 培训学校 棋牌源...
同步覆盖点的采样的clocking event 一系列的覆盖点 覆盖点之间的交叉覆盖(cross coverage) 可选的形式参数(optimal formal arguments) 覆盖选项 功能覆盖率的例子 covergroup cov_grp @(posedge clk); cov_p1: coverpoint a; endgroup cov_grp cov_inst = new(); ...