根据百度百科对于半加器的定义,半加器电路(half-adder)其实就是指对两个输入数据位a和b相加,然后输出一个结果位s和进位c,是没有进位输入的加法器电路(如果存在进位输入的话那么就是全加器电路了)。而全加器电路(full-adder)是用门电路实现两个二进制数相加并求出和的组合线路,称为一位全加器。一位...
generate 可以用来循环实例化模块或条件实例化模块 ➢ generate 与 for loop,用来构造循环结构,多次实例化某个模块 ➢ generate 与 if else 或 case,用来在多个块之间选择一个代码块 1 //Design for a half-adder 2 module ha (input a,b, 3 output sum,cout); 4 assign sum = a ^ b; 5 assign ...
//`include "adder.v" module adder_testbench; reg a,b; wire sum,cout; integer i,j; adder adder_te( .sum ( sum ), .cout ( cout), .a ( a ), .b ( b ) ); initial begin a=0;b=0; for(i=1;i<16;i=i+1) #20 a=i; end initial begin for(j=1;j<16;j=j+1) #10 ...
$display ("Full adder instantiation"); endmodule 1. 2. 3. 4. 5. 6. 7. 8. 9. 设计顶层模块,令参数为ADDER_TYPE = 1;则如下: // Top level design: Choose between half adder and full adder module my_adder (input a, b, cin, output sum, cout); parameter ADDER_TYPE = 1; generate ...
module half_adder( input a,b, output s,cout ); assign {cout,s} = a + b; endmodule 全加器电路与半加器电路相比,多了进位输入。 图1.2 全加器真值表 全加器verilog代码: module full_adder( input a,b,cin, output s,cout ); assign {cout,s} = a + b + cin; ...
half_adder u_half_adder( .A(A_tb), .B(B_tb), .S(S_tb), .CO(CO_tb) ); initial begin A_tb = 0; B_tb = 0; #12 A_tb = 1; #21 B_tb = 1; end endmodule 全加器的代码为 module full_adder(A,B,CI,S,CO);
// half adder module half_adder(S,C,A,B); output S,C; input A,B; reg S,C; always @(A or B){ S = A ^ B; C = A && B; } endmodule //DFF module dff(Q,D,Clk); output Q; input D,Clk; reg Q; wire D,Clk; always @(posedge Clk){ Q = D; //这里这种写法是错误的...
➢ generate 与 for loop,用来构造循环结构,多次实例化某个模块➢ generate 与 if else 或 case,用来在多个块之间选择一个代码块 1 //Design for a half-adder 2 module ha (input a,b, 3 output sum,cout); 4 assign sum = a ^ b; 5 assign cout = a & b; 6 endmodule 7 8 //A top ...
1 //Design for a half-adder 2 module ha (input a,b, 3 output sum,cout); 4 assign sum = a ^ b; 5 assign cout = a&b; 6 endmodule 7 8 //A top level design that contains N instances of half adder 9 module my_design
61.Half adder 题目:Create a half adder. A half adder adds two bits (with no carry-in) and produces a sum and carry-out. 大白话:构建一个半加器。 首先复习复习一下半加器的逻辑表达式,sum是和,cout是进位: sum=a^b cout=a&b 有了逻辑表达式就很好写答案了: ...