在Verilog中,input和output分别用于定义模块的输入端口和输出端口。input用于接收外部信号或者其它模块输出的信号,而output用于向外部传递数据。通过input和output定义的端口,模块之间可以进行数据传输,实现各种计算和控制任务。
5.6.1 带有output和inout形参的函数 Functions with output and inout formal arguments 传统Verilog的函数只能带有input参数。SystemVerilog允许函数带有output和inout参数,同任务一样。这一增强对void函数非常重要。 5.6.2 void函数 void function SystemVerilog允许将函数声明为void,指示该函数不返回任何值(但可赋值给ou...
函数(function)定义格式: function [<lower>:<upper>] <output_name> ; input <name>; begin <statements> end endfunction 任务(task)定义格式: // A task is a subroutine with any number of input, output or inout // arguments and may contain timing controls task <task_name>; input <input_...
◼ 基本逻辑门关键字是Verilog HDL预定义的逻辑门,包括and、or、not、xor、nand、nor等。 ◼ Verilog HDL内置了26个基本元件,其中14个门级元件,12个开关级元件。 调用门原语句法: gate_keyword<instance>(output,input1,...,inputn ); module gates(input a,b,c,d,output o);//assign o=!(a&b&c&...
outputDOUT ); regDOUT; inout 端口仿真 对包含有 inout 端口类型的 pad 模型进行仿真。pad 模型完整代码如下: 实例 modulepad( //DIN, pad driver when pad configured as output //OEN, pad direction(1-input, o-output) inputDIN,OEN, //pull function (00,01-dispull, 10-pullup, 11-pulldown) ...
module lorenz_system( input clk, // 时钟信号 input rst, // 重置信号 output reg [lbk]15:0[rbk] x, // x 变量的输出 output reg [lbk]15:0[rbk] y, // y 变量的输出 output reg [lbk]15:0[rbk] z // z 变量的输出); // 参数设定:这些值代表Lorenz方程中的 sigma, rho, beta paramet...
Input and Output SkewA skew number for an input denotes when that input is sampled before the clocking event (such as posedge or negedge) occurs. For an output, it is just the opposite - it denotes when an output is synchronized and sent after the clocking event. ...
06.Create a module that implements an AND gate. moduletop_module(inputa,inputb,outputout );assignout=a&&b;endmodule 07.Create a module that implements a NOR gate. A NOR gate is an OR gate with its output inverted. A NOR function needs two operators when written in Verilog. ...
Priority encoder with casez 一、问题描述 Build a priority encoder for 8-bit inputs. Given an 8-bit vector, the output should report the first (least significant) bit in the vector that is 1. Report zero if the input vector has no bits that are high. For example, the input 8'b1001000...
output[2*S:1] R ; input[S:1] A,B ; reg[2*S:1] R ; integer i; always @(A or B) begin R=0 ; for(i=1; i<=S; i=i+1) if(B[i]) R=R+(A<<(i-1)); end endmodule 【例2-15】 module MULT4B (R,A,B);