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//==================================================================//

// File:    d_TopLevel.v                                            //

// Version: 0.0.0.3                                                 //

// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -//

// Copyright (C) Stephen Pickett                                    //

//   Jun 08, 2005                                                   //

//                                                                  //

// This program 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 2   //

// of the License, or (at your option) any later version.           //

//                                                                  //

// This program 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.                     //

//                                                                  //

// If you have not received a copy of the GNU General Public License//

// along with this program; write to:                               //

//     Free Software Foundation, Inc.,                              //

//     51 Franklin Street, Fifth Floor,                             //

//     Boston, MA  02110-1301, USA.                                 //

//                                                                  //

//------------------------------------------------------------------//

// Revisions:                                                       //

// Ver 0.0.0.1     Apr   , 2005   Under Development                 //

// Ver 0.0.0.2     Jun 08, 2005    Updates                          //

// Ver 0.0.0.3     Jun 19, 2005    Added Character Display          //

//                                                                  //

//==================================================================//

module TopLevel(

    CLK_50MHZ_IN, MASTER_RST,

    H_SYNC, V_SYNC, VGA_OUTPUT,

    PS2C, PS2D,

//    TIME_BASE,

    ADC_DATA, ADC_CLK,

    VGA_RAM_ADDR, VGA_RAM_DATA,

    VGA_RAM_OE, VGA_RAM_WE, VGA_RAM_CS,

    SEG_OUT, SEG_SEL, leds, SHOW_LEVELS_BUTTON

    );

//==================================================================//

// DEFINITIONS                                                      //

//==================================================================//

//==================================================================//

// VARIABLE DEFINITIONS                                             //

//==================================================================//

//----------------------//

// INPUTS / OUTPUTS     //

//----------------------//

input CLK_50MHZ_IN, MASTER_RST;

output H_SYNC, V_SYNC;

output[2:0] VGA_OUTPUT;

//input[5:0] TIME_BASE;

inout PS2C, PS2D;

input[7:0] ADC_DATA;

output ADC_CLK;

output[17:0] VGA_RAM_ADDR;

inout[15:0] VGA_RAM_DATA;

output VGA_RAM_OE, VGA_RAM_WE, VGA_RAM_CS;

output[7:0] leds;

output[6:0] SEG_OUT;

output[3:0] SEG_SEL;

input SHOW_LEVELS_BUTTON;

wire SHOW_LEVELS_BUTTON;

//----------------------//

// WIRES / NODES        //

//----------------------//

wire      CLK_50MHZ_IN, MASTER_RST;

wire      H_SYNC, V_SYNC;

wire[2:0] VGA_OUTPUT;

wire[5:0] TIME_BASE;

wire      PS2C, PS2D;

wire[7:0] ADC_DATA;

wire      ADC_CLK;

wire[17:0] VGA_RAM_ADDR;

wire[15:0] VGA_RAM_DATA;

wire       VGA_RAM_OE, VGA_RAM_WE, VGA_RAM_CS;

//----------------------//

// VARIABLES            //

//----------------------//

assign TIME_BASE = 6'b0;

//==================================================================//

// TEMP                                                             //

//==================================================================//

wire[17:0] VGA_RAM_ADDRESS_w;

wire[15:0] VGA_RAM_DATA_w;

wire L_BUTTON, R_BUTTON, M_BUTTON;

wire VGA_RAM_ACCESS_OK;

wire CLK_50MHZ, CLK_64MHZ, CLK180_64MHZ;

reg CLK_VGA;

wire[6:0] SEG_OUT;

wire[3:0] SEG_SEL;

wire[7:0] data_charRamRead;

reg[7:0] data_charRamRead_buf;

wire[7:0] mask_charMap;

reg[7:0] mask_charMap_buf;

always @ (posedge CLK_50MHZ) begin

    if(R_BUTTON) begin

        data_charRamRead_buf <= data_charRamRead_buf;

        mask_charMap_buf <= mask_charMap_buf;

    end else begin

        data_charRamRead_buf <= data_charRamRead;

        mask_charMap_buf <= mask_charMap;

    end

end

sub_SegDriver segs(

    .CLK_50MHZ(CLK_50MHZ), .MASTER_RST(MASTER_RST),

    .DATA_IN(data_charRamRead_buf),

    .SEG_OUT(SEG_OUT), .SEG_SEL(SEG_SEL)

    );

wire[7:0] leds;

assign leds = mask_charMap_buf;

//==================================================================//

// SUBROUTINES                                                      //

//==================================================================//

//d_DCM_VGA clock_gen_VGA (

//    .CLKIN_IN(CLK_50MHZ_IN), 

//    .RST_IN(MASTER_RST), 

//    .CLKFX_OUT(CLK_VGA), 

//    .CLKIN_IBUFG_OUT(CLK_50MHZ_B), 

//    .LOCKED_OUT(CLK_VGA_LOCKED)

//    );

always @ (posedge CLK_50MHZ or posedge MASTER_RST)

    if(MASTER_RST) CLK_VGA <= 1'b0;

    else           CLK_VGA <= ~CLK_VGA;

wire CLK_64MHZ_LOCKED;

d_DCM clock_generator(

    .CLKIN_IN(CLK_50MHZ_IN),

    .RST_IN(MASTER_RST),

    .CLKIN_IBUFG_OUT(CLK_50MHZ),

    .CLK_64MHZ(CLK_64MHZ),

    .CLK180_64MHZ(CLK180_64MHZ),

    .LOCKED_OUT(CLK_64MHZ_LOCKED)

    );

wire[11:0] XCOORD, YCOORD;

wire[9:0] TRIGGER_LEVEL;

Driver_mouse driver_MOUSE(

    .CLK_50MHZ(CLK_50MHZ), .MASTER_RST(MASTER_RST),

    .PS2C(PS2C), .PS2D(PS2D),

    .XCOORD(XCOORD), .YCOORD(YCOORD),

    .L_BUTTON(L_BUTTON), .M_BUTTON(M_BUTTON), .R_BUTTON(R_BUTTON)

    );

Driver_MouseInput Driver_MouseInput_inst(

    .CLK_50MHZ(CLK_50MHZ), .MASTER_RST(MASTER_RST),

    .XCOORD(XCOORD[9:0]), .YCOORD(YCOORD[9:0]),

    .L_BUTTON(L_BUTTON), .M_BUTTON(M_BUTTON), .R_BUTTON(R_BUTTON),

    .TRIGGER_LEVEL(TRIGGER_LEVEL)

    );

wire[7:0] ADC_RAM_DATA;

wire[10:0] ADC_RAM_ADDR;

wire ADC_RAM_CLK;

wire[10:0] TRIG_ADDR;

wire VGA_WRITE_DONE;

ADCDataBuffer ram_ADC_databuffer(

    .CLK_64MHZ(CLK_64MHZ), .MASTER_RST(MASTER_RST),

    .CLK180_64MHZ(CLK180_64MHZ),

    .TIME_BASE(TIME_BASE),

    .RAM_ADDR(ADC_RAM_ADDR), .RAM_DATA(ADC_RAM_DATA), .RAM_CLK(ADC_RAM_CLK),

    .ADC_DATA(ADC_DATA), .ADC_CLK(ADC_CLK),

    .TRIG_ADDR(TRIG_ADDR), .VGA_WRITE_DONE(VGA_WRITE_DONE),

    .TRIGGER_LEVEL(TRIGGER_LEVEL[8:0])

    );

//------------------------------------------------------------------//

//   VGA                                                            //

//------------------------------------------------------------------//

wire[9:0] HCNT, VCNT;

wire[2:0] RGB_CHAR;

CharacterDisplay charTest(

    .MASTER_CLK(CLK_50MHZ), .MASTER_RST(MASTER_RST),

    .CLK_VGA(CLK_VGA), .HCNT(HCNT), .VCNT(VCNT),

    .RGB_OUT(RGB_CHAR),

    .data_charMap(mask_charMap), .data_charRamRead(data_charRamRead)

    );

//wire[17:0] VGA_RAM_ADDRESS_w;

//wire[15:0] VGA_RAM_DATA_w;

wire VGA_RAM_OE_w, VGA_RAM_WE_w, VGA_RAM_CS_w;

wire[17:0] VGA_RAM_ADDRESS_r;

wire VGA_RAM_OE_r, VGA_RAM_WE_r, VGA_RAM_CS_r;

//wire VGA_RAM_ACCESS_OK;

assign VGA_RAM_ADDR = (VGA_RAM_ACCESS_OK) ? VGA_RAM_ADDRESS_w : VGA_RAM_ADDRESS_r;

assign VGA_RAM_DATA = (VGA_RAM_ACCESS_OK) ? VGA_RAM_DATA_w : 16'bZ;

assign VGA_RAM_OE = (VGA_RAM_ACCESS_OK) ? VGA_RAM_OE_w : VGA_RAM_OE_r;

assign VGA_RAM_WE = (VGA_RAM_ACCESS_OK) ? VGA_RAM_WE_w : VGA_RAM_WE_r;

assign VGA_RAM_CS = (VGA_RAM_ACCESS_OK) ? VGA_RAM_CS_w : VGA_RAM_CS_r;

VGADataBuffer ram_VGA_ramwrite(

    .CLK_50MHZ(CLK_50MHZ), .MASTER_RST(MASTER_RST),

    .VGA_RAM_DATA(VGA_RAM_DATA_w), .VGA_RAM_ADDR(VGA_RAM_ADDRESS_w),

    .VGA_RAM_OE(VGA_RAM_OE_w), .VGA_RAM_WE(VGA_RAM_WE_w), .VGA_RAM_CS(VGA_RAM_CS_w),

    .VGA_RAM_ACCESS_OK(VGA_RAM_ACCESS_OK),

    .ADC_RAM_DATA(ADC_RAM_DATA), .ADC_RAM_ADDR(ADC_RAM_ADDR), .ADC_RAM_CLK(ADC_RAM_CLK),

    .TIME_BASE(TIME_BASE),

    .TRIG_ADDR(TRIG_ADDR), .VGA_WRITE_DONE(VGA_WRITE_DONE)

    );

Driver_VGA driver_VGA(

    .CLK_50MHZ(CLK_50MHZ), .MASTER_RST(MASTER_RST),

    .CLK_VGA(CLK_VGA),

    .H_SYNC(H_SYNC), .V_SYNC(V_SYNC), .VGA_OUTPUT(VGA_OUTPUT),

    .XCOORD(XCOORD), .YCOORD(YCOORD),

    .VGA_RAM_DATA(VGA_RAM_DATA), .VGA_RAM_ADDR(VGA_RAM_ADDRESS_r),

    .VGA_RAM_OE(VGA_RAM_OE_r), .VGA_RAM_WE(VGA_RAM_WE_r), .VGA_RAM_CS(VGA_RAM_CS_r),

    .VGA_RAM_ACCESS_OK(VGA_RAM_ACCESS_OK),

    .TRIGGER_LEVEL(TRIGGER_LEVEL[8:0]),

    .SHOW_LEVELS(SHOW_LEVELS_BUTTON),

    .HCNT(HCNT), .VCNT(VCNT),

    .RGB_CHAR(RGB_CHAR)

    );

//==================================================================//

// FUNCTIONAL DEFINITIONS                                           //

//==================================================================//

endmodule