Question

verilog中有关显示数码管的问题，很简单~

我要设计一个七人表决器，led灯表明是否通过，数码管显示赞成票和否定票的数量，求怎样让数码管显示票数啊！！

Answer 1

就那那种丑丑的七个HEX display来说吧，你给他一个七位长的二级制，七位对应display上的七格，0就是亮，1就是不亮。（有的是反过来的）

http://en.wikipedia.org/wiki/Seven-segment_display
拉倒下面看那个表啦
表里的abcdefg对应的是七个segment

code如下

module SevenSegmentDisplayDecoder(ssOut, nIn);
output reg [6:0] ssOut;
input [3:0] nIn;

// ssOut format {g, f, e, d, c, b, a}

always @(nIn)
case (nIn)
4'h0: ssOut = 7'b0111111;
4'h1: ssOut = 7'b0000110;
4'h2: ssOut = 7'b1011011;
4'h3: ssOut = 7'b1001111;
4'h4: ssOut = 7'b1100110;
4'h5: ssOut = 7'b1101101;
4'h6: ssOut = 7'b1111101;
4'h7: ssOut = 7'b0000111;
4'h8: ssOut = 7'b1111111;
4'h9: ssOut = 7'b1100111;
4'hA: ssOut = 7'b1110111;
4'hB: ssOut = 7'b1111100;
4'hC: ssOut = 7'b0111001;
4'hD: ssOut = 7'b1011110;
4'hE: ssOut = 7'b1111001;
4'hF: ssOut = 7'b1110001;
default: ssOut = 7'b1001001;
endcase
endmodule