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//------------------------------
// Module name: hex_to_7seg
// Function: convert 4-bit hex value to drive 7 segment display
// output is low active - using case statement
// Creator: Peter Cheung
// Version: 1.1
// Date: 23 Oct 2011
//------------------------------
module hex_to_7seg (out,in);
output [6:0] out; // low-active output to drive 7 segment display
input [3:0] in; // 4-bit binary input of a hexademical number
reg [6:0] out; // make out a variable for use in procedural assignment
always @ (in)
case (in)
4'h0: out = 7'b1000000;
4'h1: out = 7'b1111001; // -- 0 ---
4'h2: out = 7'b0100100; // | |
4'h3: out = 7'b0110000; // 5 1
4'h4: out = 7'b0011001; // | |
4'h5: out = 7'b0010010; // -- 6 ---
4'h6: out = 7'b0000010; // | |
4'h7: out = 7'b1111000; // 4 2
4'h8: out = 7'b0000000; // | |
4'h9: out = 7'b0011000; // -- 3 ---
4'ha: out = 7'b0001000;
4'hb: out = 7'b0000011;
4'hc: out = 7'b1000110;
4'hd: out = 7'b0100001;
4'he: out = 7'b0000110;
4'hf: out = 7'b0001110;
endcase
endmodule
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