**这是本文档旧的修订版！**
简单的BintoBCD模组
8位Binary转化为12位BCD
原理图
模组
add3
Company: Cal Poly Pomona
Engineer: Yongyuan Zhang Lab 3 part A, question 1
Create Date: 2018/05/04 10:40:12 Description: Code of add 3 functions
timescale 1ns / 1ps
module add3(
input [3:0]x,
output reg [3:0]y
);
always@(*)
begin
if(x < 5)
y = x;
else
y = x +3; // y = x ^4'b0111;
end
endmodule
Bin转化为BCD模组
//////////////////////////////////////////////////////////////////////////////////
// Company: Cal Poly Pomona
// Engineer: Yongyuan Zhang
// Lab 3 part A, question 2
// Create Date: 2018/05/04 10:50:14
// Description: Code of binary to bcd
//////////////////////////////////////////////////////////////////////////////////
timescale 1ns / 1ps
module bin2bcd(
input[7:0] BIN,
output [11:0] BCD
);
wire [3:0] u0,u1,u2,u3,u5;
add3 U0(.x( {1'b0,BIN[7:5]} ),.y(u0));
add3 U1(.x( {u0[2:0],BIN[4]} ),.y(u1));
add3 U2(.x( {u1[2:0],BIN[3]} ),.y(u2));
add3 U3(.x( {u2[2:0],BIN[2]} ),.y(u3));
add3 U4(.x( {u3[2:0],BIN[1]} ),.y(BCD[4:1]));
add3 U5(.x( {1'b0,u0[3],u1[3],u2[3]} ), .y(u5));
add3 U6(.x( {u5[2:0],u3[3]}), . y(BCD[8:5]));
assign BCD[0] = BIN[0];
assign BCD[11:9] = {2'b00,u5[3]};
endmodule