Subversion Repositories s80186

// Copyright Jamie Iles, 2017

//

// This file is part of s80x86.

//

// s80x86 is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// s80x86 is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with s80x86.  If not, see .

module LEDSRegister(input logic clk,

                    input logic reset,

                    output logic [`CONFIG_NUM_LEDS-1:0] leds_val,

                    input logic cs,

                    input logic [15:0] data_m_data_in,

                    input logic data_m_access,

                    output logic data_m_ack,

                    input logic data_m_wr_en,

                    input logic [1:0] data_m_bytesel);

always_ff @(posedge clk or posedge reset)

    if (reset)

        leds_val <= `CONFIG_NUM_LEDS'b0;

    else begin

        if (`CONFIG_NUM_LEDS > 8 && cs && data_m_access && data_m_bytesel[1]

            && data_m_wr_en)

            leds_val[`CONFIG_NUM_LEDS-1:8] <= data_m_data_in[`CONFIG_NUM_LEDS-1:8];

        if (cs && data_m_access && data_m_bytesel[0] && data_m_wr_en)

            leds_val[7:0] <= data_m_data_in[7:0];

    end

always_ff @(posedge clk)

    data_m_ack <= cs & data_m_access;

endmodule