DE2-115 開發 以 4 TO 10 Decoder 74145 為例

 DE2-115 開發 以 4 TO 10  Decoder 74145 為例

module x74145_4x10_deocder(SW, LEDR, LEDG , CLOCK_50 ,KEY ,HEX0 ,HEX1 ,HEX2,HEX3,HEX4 ,HEX5 ,HEX6,HEX7, GPIO );
 input  [17:0] SW;   // toggle switches
 input  [7:0] KEY;       // Push bottom
 input  CLOCK_50;   //Clock 27MHz , 50Mhz
 output [17:0] LEDR;   // red  LEDS
 output [8:0] LEDG;   // green LEDs
 output [6:0] HEX0,HEX1,HEX2,HEX3; //7-segment display
 output [6:0] HEX4,HEX5,HEX6,HEX7; //7-segment display
 inout  [35:0] GPIO;
 assign HEX0=7'b111_1111;
 assign HEX1=7'b111_1111;
 assign HEX2=7'b111_1111;
 assign HEX3=7'b111_1111;
 assign HEX4=7'b111_1111;
 assign HEX5=7'b111_1111;
 assign HEX6=7'b111_1111;
 assign HEX7=7'b111_1111;
 
 //decoder2to4_Behavioral (i, d) ;
 decoder4to10_Behavioral(SW[3:0],LEDR[9:0]);
 
endmodule
//Behavioral Modeling 
module decoder4to10_Behavioral (i, d) ;
input  [3:0]i;
output [9:0]d;
reg [9:0] d;
always @ (i )
case (i)
0: d = 10'b11_1111_1110;
1: d = 10'b11_1111_1101;
2: d = 10'b11_1111_1011;
3: d = 10'b11_1111_0111;
4: d = 10'b11_1110_1111;
5: d = 10'b11_1101_1111;
6: d = 10'b11_1011_1111;
7: d = 10'b11_0111_1111;
8: d = 10'b10_1111_1111;
9: d = 10'b01_1111_1111;

default d = 10'b11_1111_1111;
endcase
endmodule