diglab1.v

altera DE2开发板配套的数字显示文件程序altera DE2开发板配套的数字显示文件程序

module diglab1(
  // Clock Input (50 MHz)
  input  CLOCK_50,
  //  Push Buttons
  input  [3:0]  KEY,
  //  DPDT Switches 
  input  [17:0]  SW,
  //  7-SEG Displays
  output  [6:0]  HEX0, HEX1, HEX2, HEX3, HEX4, HEX5, HEX6, HEX7,
  //  LEDs
  output  [8:0]  LEDG,  //  LED Green[8:0]
  output  [17:0]  LEDR, //  LED Red[17:0]
  //  GPIO Connections
  inout  [35:0]  GPIO_0, GPIO_1
);

//  set all inout ports to tri-state
assign  GPIO_0    =  36'hzzzzzzzzz;
assign  GPIO_1    =  36'hzzzzzzzzz;


// Connect dip switches to red LEDs
assign LEDR[17:0] = SW[17:0];

// turn off green LEDs
assign LEDG[8:0] = 0;

reg [15:0] A;

// map to 7-segment displays

hex_7seg dsp0(A[3:0],HEX0);
hex_7seg dsp1(A[7:4],HEX1);
hex_7seg dsp2(A[11:8],HEX2);
hex_7seg dsp3(A[15:12],HEX3);


wire [6:0] blank = ~7'h00; 

// blank remaining digits
assign HEX4 = blank;
assign HEX5 = blank;
assign HEX6 = blank;
assign HEX7 = blank;

// control (set) value of A, signal with KEY3

always @(negedge KEY[3])
	A <= SW[15:0];

endmodule