Verilog 简易ALU
ALU设计
ALU模块：
//
//创建日期：2022/11/6 20:06:00
//设计名称：ALU算术逻辑单元
//课程名称：alu
//说明:
//输入: [11:0] alu_control; // ALU控制信号
// [31:0] alu_src1; // ALU操作数1
// [31:0] alu_src2; // ALU操作数2
//输出: [31:0] alu_result; // ALU结果
//依赖项：
//
//版次：
//版本0.01-文件已创建
//其他注释：
//
//
module alu(alu_control,alu_src1,alu_src2,alu_result);
input [11:0] alu_control; // ALU控制信号
input [31:0] alu_src1; // ALU操作数1
input [31:0] alu_src2; // ALU操作数2
output [31:0] alu_result; // ALU结果
reg [31:0] alu_result;
// 控制信号为独热编码
always @(*)
begin
case(alu_control) // 下面的1，2指操作数1，操作数2
12'b000000000001:alu_result<=alu_src1<<16; // 高位加载 1
12'b000000000010:alu_result<=alu_src1>>>alu_src2; // 算术右移 2
12'b000000000100:alu_result<=alu_src1>>alu_src2; // 逻辑右移 4
12'b000000001000:alu_result<=alu_src1<alu_display.v
//*************************************************************************
// > 文件名: alu_display.v
// > 描述 ：ALU显示模块，调用FPGA板上的IO接口和触摸屏
// > 作者 : LOONGSON
// > 日期 : 2016-04-14
//*************************************************************************
module alu_display(
//时钟与复位信号
input clk,
input resetn, //后缀"n"代表低电平有效
//拨码开关，用于选择输入数
input [1:0] input_sel, //00:输入为控制信号(alu_control)
//10:输入为源操作数1(alu_src1)
//11:输入为源操作数2(alu_src2)
//触摸屏相关接口，不需要更改
output lcd_rst,
output lcd_cs,
output lcd_rs,
output lcd_wr,
output lcd_rd,
inout[15:0] lcd_data_io,
output lcd_bl_ctr,
inout ct_int,
inout ct_sda,
output ct_scl,
output ct_rstn
);
//-----{调用ALU模块}begin
reg [11:0] alu_control; // ALU控制信号
reg [31:0] alu_src1; // ALU操作数1
reg [31:0] alu_src2; // ALU操作数2
wire [31:0] alu_result; // ALU结果
alu alu_module(
.alu_control(alu_control),
.alu_src1 (alu_src1 ),
.alu_src2 (alu_src2 ),
.alu_result (alu_result )
);
//-----{调用ALU模块}end
//---------------------{调用触摸屏模块}begin--------------------//
//-----{实例化触摸屏}begin
//此小节不需要更改
reg display_valid;
reg [39:0] display_name;
reg [31:0] display_value;
wire [5 :0] display_number;
wire input_valid;
wire [31:0] input_value;
lcd_module lcd_module(
.clk (clk ), //10Mhz
.resetn (resetn ),
//调用触摸屏的接口
.display_valid (display_valid ),
.display_name (display_name ),
.display_value (display_value ),
.display_number (display_number),
.input_valid (input_valid ),
.input_value (input_value ),
//lcd触摸屏相关接口，不需要更改
.lcd_rst (lcd_rst ),
.lcd_cs (lcd_cs ),
.lcd_rs (lcd_rs ),
.lcd_wr (lcd_wr ),
.lcd_rd (lcd_rd ),
.lcd_data_io (lcd_data_io ),
.lcd_bl_ctr (lcd_bl_ctr ),
.ct_int (ct_int ),
.ct_sda (ct_sda ),
.ct_scl (ct_scl ),
.ct_rstn (ct_rstn )
);
//-----{实例化触摸屏}end
//-----{从触摸屏获取输入}begin
//根据实际需要输入的数修改此小节，
//建议对每一个数的输入，编写单独一个always块
//当input_sel为00时，表示输入数控制信号，即alu_control
always @(posedge clk)
begin
if (!resetn)
begin
alu_control <= 12'd0;
end
else if (input_valid && input_sel==2'b00)
begin
alu_control <= input_value[11:0];
end
end
//当input_sel为10时，表示输入数为源操作数1，即alu_src1
always @(posedge clk)
begin
if (!resetn)
begin
alu_src1 <= 32'd0;
end
else if (input_valid && input_sel==2'b10)
begin
alu_src1 <= input_value;
end
end
//当input_sel为11时，表示输入数为源操作数2，即alu_src2
always @(posedge clk)
begin
if (!resetn)
begin
alu_src2 <= 32'd0;
end
else if (input_valid && input_sel==2'b11)
begin
alu_src2 <= input_value;
end
end
//-----{从触摸屏获取输入}end
//-----{输出到触摸屏显示}begin
//根据需要显示的数修改此小节，
//触摸屏上共有44块显示区域，可显示44组32位数据
//44块显示区域从1开始编号，编号为1~44，
always @(posedge clk)
begin
case(display_number)
6'd1 :
begin
display_valid <= 1'b1;
display_name <= "SRC_1";
display_value <= alu_src1;
end
6'd2 :
begin
display_valid <= 1'b1;
display_name <= "SRC_2";
display_value <= alu_src2;
end
6'd3 :
begin
display_valid <= 1'b1;
display_name <= "CONTR";
display_value <={20'd0, alu_control};
end
6'd4 :
begin
display_valid <= 1'b1;
display_name <= "RESUL";
display_value <= alu_result;
end
default :
begin
display_valid <= 1'b0;
display_name <= 40'd0;
display_value <= 32'd0;
end
endcase
end
//-----{输出到触摸屏显示}end
//----------------------{调用触摸屏模块}end---------------------//
endmodule
tp仿真
`timescale 1ns / 1ps
module tb;
reg [11:0] alu_control; // ALU控制信号
reg [31:0] alu_src1; // ALU操作数1
reg [31:0] alu_src2; // ALU操作数2
wire [31:0] alu_result; // ALU结果
alu alu_module(
.alu_control(alu_control),
.alu_src1 (alu_src1 ),
.alu_src2 (alu_src2 ),
.alu_result (alu_result )
);
initial begin
alu_control=12'd0;
alu_src1=32'd0;
alu_src2=32'd0;
#10;
alu_control=12'b000000000001; // 1
#10;
alu_src1=32'd1024;
#10;
alu_src1=32'd512;
#10;
alu_src2=32'd64;
#50;
alu_control=12'b000000000010; // 2
#10;
alu_src2=32'd1024;
#10;
alu_src2=32'd512;
#10;
alu_src1=32'd64;
#50;
alu_control=12'b000000000100; // 4
#10;
alu_src1=32'd192;
#10;
alu_src2=32'd192;
#10;
alu_src2=32'd16;
#50;
alu_control=12'b000000001000; // 8
#10;
alu_src1=32'd192;
#10;
alu_src2=32'd192;
#10;
alu_src2=32'd16;
#50;
alu_control=12'b000000010000; // 16
#10;
alu_src1=32'd128;
#10;
alu_src2=32'd127;
#10;
alu_src2=32'd0;
#50;
alu_control=12'b000000100000; // 32
#10;
alu_src1=32'd128;
#10;
alu_src2=32'd127;
#10;
alu_src2=32'd0;
#50;
alu_control=12'b000001000000; // 64
#10;
alu_src1=32'hffffffff;
#10;
alu_src2=32'h1;
#10;
alu_src2=32'hffffffff;
#50;
alu_control=12'b000010000000; // 128
#10;
alu_src1=32'h0fffffff;
#10;
alu_src2=32'h1;
#10;
alu_src1=32'h0;
#50;
alu_control=12'b000100000000; // 256
#10;
alu_src1=32'hffffffff;
alu_src2=32'd1;
#10;
alu_src2=32'd3;
#10;
alu_src2=32'd5;
#50;
alu_control=12'b001000000000; // 512
#10;
alu_src1=32'd1;
#10;
alu_src1=32'd3;
alu_src2=32'hffffffff;
#10;
alu_src1=32'd5;
#50;
alu_control=12'b010000000000; // 1024
#10;
alu_src1=32'd1;
#10;
alu_src1=32'd2048;
#10;
alu_src1=32'hf0000000;
#50;
alu_control=12'b100000000000; // 2048
#10;
alu_src1=32'd1;
#10;
alu_src1=32'd2048;
#10;
alu_src1=32'hf0000000;
end
endmodule约束（COE2020）（板不一样的不要用这个约束）
#时钟信号连接
set_property PACKAGE_PIN AC19 [get_ports clk]
#脉冲开关，用于输入作为复位信号，低电平有效
#set_property PACKAGE_PIN Y3 [get_ports resetn]
set_property PACKAGE_PIN AB21 [get_ports resetn]
#拨码开关连接，用于输入，依次为sw0,sw1
#set_property PACKAGE_PIN AE20 [get_ports input_sel[0]]
set_property PACKAGE_PIN AE17 [get_ports input_sel[0]]
#set_property PACKAGE_PIN AD24 [get_ports input_sel[1]]
set_property PACKAGE_PIN AF17 [get_ports input_sel[1]]
set_property IOSTANDARD LVCMOS33 [get_ports clk]
set_property IOSTANDARD LVCMOS33 [get_ports resetn]
set_property IOSTANDARD LVCMOS33 [get_ports input_sel[1]]
set_property IOSTANDARD LVCMOS33 [get_ports input_sel[0]]
#触摸屏引脚连接
#set_property PACKAGE_PIN J25 [get_ports lcd_rst]
#set_property PACKAGE_PIN H18 [get_ports lcd_cs]
#set_property PACKAGE_PIN K16 [get_ports lcd_rs]
#set_property PACKAGE_PIN L8 [get_ports lcd_wr]
#set_property PACKAGE_PIN K8 [get_ports lcd_rd]
#set_property PACKAGE_PIN J15 [get_ports lcd_bl_ctr]
#set_property PACKAGE_PIN H9 [get_ports {lcd_data_io[0]}]
#set_property PACKAGE_PIN K17 [get_ports {lcd_data_io[1]}]
#set_property PACKAGE_PIN J20 [get_ports {lcd_data_io[2]}]
#set_property PACKAGE_PIN M17 [get_ports {lcd_data_io[3]}]
#set_property PACKAGE_PIN L17 [get_ports {lcd_data_io[4]}]
#set_property PACKAGE_PIN L18 [get_ports {lcd_data_io[5]}]
#set_property PACKAGE_PIN L15 [get_ports {lcd_data_io[6]}]
#set_property PACKAGE_PIN M15 [get_ports {lcd_data_io[7]}]
#set_property PACKAGE_PIN M16 [get_ports {lcd_data_io[8]}]
#set_property PACKAGE_PIN L14 [get_ports {lcd_data_io[9]}]
#set_property PACKAGE_PIN M14 [get_ports {lcd_data_io[10]}]
#set_property PACKAGE_PIN F22 [get_ports {lcd_data_io[11]}]
#set_property PACKAGE_PIN G22 [get_ports {lcd_data_io[12]}]
#set_property PACKAGE_PIN G21 [get_ports {lcd_data_io[13]}]
#set_property PACKAGE_PIN H24 [get_ports {lcd_data_io[14]}]
#set_property PACKAGE_PIN J16 [get_ports {lcd_data_io[15]}]
#set_property PACKAGE_PIN L19 [get_ports ct_int]
#set_property PACKAGE_PIN J24 [get_ports ct_sda]
#set_property PACKAGE_PIN H21 [get_ports ct_scl]
#set_property PACKAGE_PIN G24 [get_ports ct_rstn]
set_property PACKAGE_PIN E5 [get_ports lcd_rst]
set_property PACKAGE_PIN G7 [get_ports lcd_cs]
set_property PACKAGE_PIN H7 [get_ports lcd_rs]
set_property PACKAGE_PIN E6 [get_ports lcd_wr]
set_property PACKAGE_PIN D5 [get_ports lcd_rd]
set_property PACKAGE_PIN J5 [get_ports lcd_bl_ctr]
set_property PACKAGE_PIN C4 [get_ports {lcd_data_io[0]}]
set_property PACKAGE_PIN C3 [get_ports {lcd_data_io[1]}]
set_property PACKAGE_PIN D4 [get_ports {lcd_data_io[2]}]
set_property PACKAGE_PIN D3 [get_ports {lcd_data_io[3]}]
set_property PACKAGE_PIN F5 [get_ports {lcd_data_io[4]}]
set_property PACKAGE_PIN G6 [get_ports {lcd_data_io[5]}]
set_property PACKAGE_PIN F4 [get_ports {lcd_data_io[6]}]
set_property PACKAGE_PIN E3 [get_ports {lcd_data_io[7]}]
set_property PACKAGE_PIN G5 [get_ports {lcd_data_io[8]}]
set_property PACKAGE_PIN H6 [get_ports {lcd_data_io[9]}]
set_property PACKAGE_PIN F2 [get_ports {lcd_data_io[10]}]
set_property PACKAGE_PIN F3 [get_ports {lcd_data_io[11]}]
set_property PACKAGE_PIN G4 [get_ports {lcd_data_io[12]}]
set_property PACKAGE_PIN G2 [get_ports {lcd_data_io[13]}]
set_property PACKAGE_PIN H4 [get_ports {lcd_data_io[14]}]
set_property PACKAGE_PIN H3 [get_ports {lcd_data_io[15]}]
set_property PACKAGE_PIN K6 [get_ports ct_int]
set_property PACKAGE_PIN J6 [get_ports ct_sda]
set_property PACKAGE_PIN L8 [get_ports ct_scl]
set_property PACKAGE_PIN K7 [get_ports ct_rstn]
set_property IOSTANDARD LVCMOS33 [get_ports lcd_rst]
set_property IOSTANDARD LVCMOS33 [get_ports lcd_cs]
set_property IOSTANDARD LVCMOS33 [get_ports lcd_rs]
set_property IOSTANDARD LVCMOS33 [get_ports lcd_wr]
set_property IOSTANDARD LVCMOS33 [get_ports lcd_rd]
set_property IOSTANDARD LVCMOS33 [get_ports lcd_bl_ctr]
set_property IOSTANDARD LVCMOS33 [get_ports {lcd_data_io[0]}]
set_property IOSTANDARD LVCMOS33 [get_ports {lcd_data_io[1]}]
set_property IOSTANDARD LVCMOS33 [get_ports {lcd_data_io[2]}]
set_property IOSTANDARD LVCMOS33 [get_ports {lcd_data_io[3]}]
set_property IOSTANDARD LVCMOS33 [get_ports {lcd_data_io[4]}]
set_property IOSTANDARD LVCMOS33 [get_ports {lcd_data_io[5]}]
set_property IOSTANDARD LVCMOS33 [get_ports {lcd_data_io[6]}]
set_property IOSTANDARD LVCMOS33 [get_ports {lcd_data_io[7]}]
set_property IOSTANDARD LVCMOS33 [get_ports {lcd_data_io[8]}]
set_property IOSTANDARD LVCMOS33 [get_ports {lcd_data_io[9]}]
set_property IOSTANDARD LVCMOS33 [get_ports {lcd_data_io[10]}]
set_property IOSTANDARD LVCMOS33 [get_ports {lcd_data_io[11]}]
set_property IOSTANDARD LVCMOS33 [get_ports {lcd_data_io[12]}]
set_property IOSTANDARD LVCMOS33 [get_ports {lcd_data_io[13]}]
set_property IOSTANDARD LVCMOS33 [get_ports {lcd_data_io[14]}]
set_property IOSTANDARD LVCMOS33 [get_ports {lcd_data_io[15]}]
set_property IOSTANDARD LVCMOS33 [get_ports ct_int]
set_property IOSTANDARD LVCMOS33 [get_ports ct_sda]
set_property IOSTANDARD LVCMOS33 [get_ports ct_scl]
set_property IOSTANDARD LVCMOS33 [get_ports ct_rstn]