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//
// Copyright 2013 Ettus Research LLC
//
//Message format:
// msg[63]: Completion {1 -> Read Completion, 0 -> Transaction Request}
// msg[62]: Write request*
// msg[61]: Read request*
// msg[60]: Half word {1 -> 16-bit transaction, 0 -> 32-bit transaction}*
// msg[59:52]: Reserved
// msg[51:32]: Address*
// msg[31:0]: Data
//
// * Field only valid when the word is a transaction request.
module ioport2_msg_decode(
input [63:0] message,
output rd_response,
output wr_request,
output rd_request,
output half_word,
output [19:0] address,
output [31:0] data,
output [31:0] control
);
assign rd_response = message[63];
assign wr_request = message[62];
assign rd_request = message[61];
assign half_word = message[60];
assign address = message[51:32];
assign data = message[31:0];
assign control = message[63:32];
endmodule
module ioport2_msg_encode(
input rd_response,
input wr_request,
input rd_request,
input half_word,
input [19:0] address,
input [31:0] data,
output [31:0] control,
output [63:0] message
);
assign control = rd_response ? {rd_response, 31'h0} : {rd_response, wr_request, rd_request, half_word, 8'h00, address};
assign message = {control, data};
endmodule
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