//decorder for 7segment,high level is active
module p7segment(datain,out);
 input [3:0]datain ;    //七段顯示器輸入
 output [6:0] out;     //七段顯示器字符輸出
 
 reg [6:0] out;
 
 always @(datain )
     case (datain)
       4'b0000: out <= 7'b1111110 ;
       4'b0001: out <= 7'b0110000 ;
       4'b0010: out <= 7'b1101101 ;
       4'b0011: out <= 7'b1111001 ;
       4'b0100: out <= 7'b0110011 ;
       4'b0101: out <= 7'b1011011 ;
       4'b0110: out <= 7'b1011111 ;
       4'b0111: out <= 7'b1110000 ;
       4'b1000: out <= 7'b1111111 ;
       4'b1001: out <= 7'b1111011 ; 
       4'b1010: out <= 7'b1110111 ;
       4'b1011: out <= 7'b0011111 ; 
       4'b1100: out <= 7'b1001110 ;
       4'b1101: out <= 7'b0111101 ;
       4'b1110: out <= 7'b1001111 ;
       4'b1111: out <= 7'b1000111 ;
     endcase   

endmodule