在verilog使用assign语句驱动或分配reg类型变量是非法的。这是因为reg变量能够存储数据,不需要连续驱动。reg信号只能在initial或always程序块中驱动。 隐式连续赋值 当使用assign语句为给定的线网类型赋值时,它被称为显式赋值,Verilog也允许在声明线网类型时进行赋值,称为隐式赋值。 wire[1:0]a;assigna=x&y;// E...
integer i; // Instantiate the design and connect design inputs/outputs with ha u0 ( .a(a), .b(b), .sum(sum), .cout(cout)); initial begin // At the beginning of time, initialize all inputs of the design // to a known value, in this case we have chosen it to be 0. a <...
b; initial begin $monitor("%d %d %d\n", c, a, b); #1 a = 2; #1 b = 3; #1 $finish; end my_circuit x(c, a, b); endmodule // But it was said: // Use always@(*) block with blocking assignments for combinational circuits. /...
vector #(10) vten; // object with vector of size 10 vector #(.size(2)) vtwo; // object with vector of size 2 typedef vector#(4) Vfour; // Class with vector of size 4 class stack #(type T = int);//参数是一个数据类型 local T items[]; task push( T a ); ... endtask ...
I'm writing a netlist/SDF with the following commands: write_verilog -mode timesim -force t7189_top_postlayout.v write_sdf -mode timesim -force t7189_top_postlayout.sdf However, Incisive is reporting the path delay annotation to be low (~57%). I'm investigating why and trying to elim...
To ensure compatibility with the desired clock frequency during simulation, it is important to verify that any additional values in the code, such as#delay, are appropriately chosen. Solution 4: In Verilog, port directions serve as suggestions rather than strict requirements, unlike VHDL which enfo...
Verilog初级教程(8)Verilog中的assign语句,wire类型的信号需要连续赋值。例如,考虑一根电线用于连接面包板上的元件。只要将+5V电池施加在电线的一端,连接在电线另一端的元件就会得到所需的电压。