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。
•Function不可以调用task,但task可以调用function。 •Function至少要有一个input类型的参数,且不能有output,inout类型的参数,而task既可以没有参数,也可以有各种类型的参数。 •Function返回一个值,而task不返回值。 •Function只能对输入值返回一个结果值,而task支持多用途,可以返回多个结果值,但task只能用out...
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_...
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); parameter S=4; output[2*S:1] R ; input[S:1] A,B ...
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. ...
module bell_controller( input ClkIn, // 输入时钟 input Resetb, // 复位按钮 input [2:0] tone_number, // 输入的音符序号 output reg Bell // 蜂鸣器输出 ); wire ClkBell; reg [15:0] PreDiv; reg [12:0] Delay; // 实例化频率分频器 gen_divd Gen_ClkBell(.reset(Resetb), .clkin(ClkI...
题目:Module A is supposed to implement the functionz = (x^y) & x. Implement this module. 大白话:写一个模块A,实现功能z = (x^y) & x 答案: moduletop_module(input x,input y,output z);assign z=(x^y)&x;endmodule 49.Simple circuit B ...
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...
1:0;endmodule//if 语句moduletop_module (input[1:0] A,input[1:0] B,outputz );always@(*)beginif(A ==B) z=1;elsez =0;endendmodule 53.Module A is supposed to implement the functionz = (x^y) & x. Implement this module.