In my code I am using the following sensitivity list declaration. Problem: This code never enters the always @( * ) block - thus the supply check always fails (supplyOk=0): //checking supply `ifdef SUPPLYCHKOFF logic supplyOk = ...
下面的并列例子对比了传统Verilog的always块和SystemVerilog的always_comb块: 相较always,always_comb的第一个好处就是工具能知道过程块意图,因而能推出组合性的敏感列表(combinatorial sensitivity list)。敏感列表不完整是传统Verilog非常常见的一个编码错误,且由于并非语法错误,会导致RTL仿真行为与综合后门级行为的不一致。
Also note that in SystemVerilog: (1) class definitions are typically gathered into one or more packages, and (2) items that are defined inside of a package are not permitted to make hierarchical references to items outside of that package. (this is also why we need virtual interface) Ano...
Verilog 2001 first introducedalways @*as a shortcut to code combinational logic. Thealways @*is intended to infer a complete sensitivity list for both RTL simulation and synthesis from the contents of the block, saving a designer from having to manually specify a sensitivity list to code combina...
I have a module that contains logic equivalent to the following simplified block of SystemVerilog code: module (Interface1.input inIF, Interface2.output outIF) always_comb begin if(passExternalSignals) begin inIF.rfd = outIF.rfd; outIF.rdy = inIF.rdy; outIF.data = in...
SNUG2005 Israel Rev 1.0 1 SystemVerilog's priority & unique - A Solution to Verilog's "full_case" & "parallel_case" Evil Twins! 1.0 The legend of full_case parallel_case Prior to 1999, I found that engineers routinely added full_case parallel_case to all RTL case statements. Indeed, ...
Verilog always block is a procedural statement that starts an activity flow. It is essentially an infinite loop. However, when combined with a Verilog event expression, it can be used to model combinational and sequential logic. Share this: ...
SystemVerilogalways_combprocesses are designed for this purpose and automatically work out what signals will trigger the process, so the designer does not have to add a sensitivity list in the code. Designers sometimes inadvertently infer latches when they write HDL code for their combinational ...
EN首先简单介绍下 strpos 函数，strpos 函数是查找某个字符在字符串中的位置，这里需要明确这个函数的作用...
K eyw ords:system level description language;Verilog HDL;SystemC;syntax equivalence 随着片上系统(SoC)[1]设计的复杂程度增加,传统的设计方法已经不能够满足电子系统设计的要求,原因在于系统设计、硬件设计和软件设计使用不同语言,无法进行软硬件协同验证,系统验证成为制约设计效率的主要因素.因而迫切需要一种...