make button detection more reliable in standalone mode and add exit command

[proxmark3-svn] / fpga / util.v

//-----------------------------------------------------------------------------\r
// General-purpose miscellany.\r
//\r
// Jonathan Westhues, April 2006.\r
//-----------------------------------------------------------------------------\r
\r
module mux8(sel, y, x0, x1, x2, x3, x4, x5, x6, x7);\r
    input [2:0] sel;\r
    input x0, x1, x2, x3, x4, x5, x6, x7;\r
    output y;\r
    reg y;\r
\r
always @(x0 or x1 or x2 or x3 or x4 or x5 or x6 or x7 or sel)\r
begin\r
    case (sel)\r
        3'b000: y = x0;\r
        3'b001: y = x1;\r
        3'b010: y = x2;\r
        3'b011: y = x3;\r
        3'b100: y = x4;\r
        3'b101: y = x5;\r
        3'b110: y = x6;\r
        3'b111: y = x7;\r
    endcase\r
end\r
\r
endmodule\r