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开发板

基础实验

LED 流水

配置文件

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NET "clk_50m"          LOC=P55   | IOSTANDARD = LVCMOS33;

NET "rst_n"            LOC=P47   | IOSTANDARD = LVCMOS33;

NET "led[0]"           LOC=P56   | IOSTANDARD = LVCMOS33;
NET "led[1]"           LOC=P57   | IOSTANDARD = LVCMOS33;
NET "led[2]"           LOC=P58   | IOSTANDARD = LVCMOS33;
NET "led[3]"           LOC=P59   | IOSTANDARD = LVCMOS33;

verilog 文件

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module led (input clk_50m, input rst_n, output reg [3:0] led);


reg [23:0] cnt;

always @(posedge clk_50m or negedge rst_n)
begin
    if(0 == rst_n)
        cnt <= 1'b0;
    else
        cnt <= cnt + 1'b1;
end

always @(posedge clk_50m or negedge rst_n)
begin
    if(0 == rst_n)
        led <= 4'b0001;

    else if (cnt == 24'hFFFFFF)
        led <= led - 1'b1;
    else ;
end


endmodule

效果图

2->4 译码器

这个开发板上只有 4个LED， 为了方便， 做一个2->4译码器

配置文件

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NET "clk_50m"          LOC=P55   | IOSTANDARD = LVCMOS33;

NET "rst_n"            LOC=P47   | IOSTANDARD = LVCMOS33;

NET "key[0]"           LOC=P50   | IOSTANDARD = LVCMOS33;
NET "key[1]"           LOC=P51   | IOSTANDARD = LVCMOS33;


NET "led[0]"           LOC=P56   | IOSTANDARD = LVCMOS33;
NET "led[1]"           LOC=P57   | IOSTANDARD = LVCMOS33;
NET "led[2]"           LOC=P58   | IOSTANDARD = LVCMOS33;
NET "led[3]"           LOC=P59   | IOSTANDARD = LVCMOS33;

verilog 文件

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module led (input clk_50m, input rst_n, input [1:0]key, output reg [3:0] led);


always @(posedge clk_50m or negedge rst_n)
begin
    if(0 == rst_n)
        led <= 4'b1111; //复位时 灯全灭
    else
    begin
        case(key[1:0])
            2'b11 : led <= 4'b1110;
            2'b10 : led <= 4'b1101;
            2'b01 : led <= 4'b1011;
            2'b00 : led <= 4'b0111;
            default:;
        endcase
    end
end


endmodule

RTL 图

bit 序列 检验

配置文件

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//NET "clk_50m"          LOC=P55   | IOSTANDARD = LVCMOS33;

//NET "rst_n"            LOC=P50   | IOSTANDARD = LVCMOS33;

//NET "key[0]"           LOC=P47   | IOSTANDARD = LVCMOS33;
//NET "key[1]"           LOC=P51   | IOSTANDARD = LVCMOS33;

NET "led[0]"           LOC=P56   | IOSTANDARD = LVCMOS33;
NET "led[1]"           LOC=P57   | IOSTANDARD = LVCMOS33;
NET "led[2]"           LOC=P58   | IOSTANDARD = LVCMOS33;
NET "led[3]"           LOC=P59   | IOSTANDARD = LVCMOS33;

verolog 文件

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module led (output [3:0] led);
assign led[3:0] = 4'b0001;
endmodule

效果图