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smpickett |
//==================================================================
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// File: d_MouseInput.v
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// Version: 0.01
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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// Copyright Stephen Pickett
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// May 19, 2005
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//------------------------------------------------------------------
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// Revisions:
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// Ver 0.01 May 19, 2005 Initial Release
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//
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//==================================================================
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module Driver_MouseInput(
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CLK_50MHZ, MASTER_RST,
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XCOORD, YCOORD, L_BUTTON, R_BUTTON, M_BUTTON,
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TRIGGER_LEVEL,
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TEST_in_range_trig
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);
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//==================================================================//
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// DEFINITIONS //
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//==================================================================//
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//==================================================================//
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// VARIABLE DEFINITIONS //
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//==================================================================//
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//----------------------//
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// INPUTS / OUTPUTS //
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//----------------------//
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input CLK_50MHZ; // System wide clock
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input MASTER_RST; // System wide reset
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input[11:0] XCOORD; // X coordinate of the cursor
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input[11:0] YCOORD; // Y coordinate of the cursor
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input L_BUTTON; // Left Mouse Button Press
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input R_BUTTON; // Right Mouse Button Press
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input M_BUTTON; // Middle Mouse Button Press
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output[8:0] TRIGGER_LEVEL; // Current Trigger Level
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//----------------------//
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// WIRES / NODES //
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//----------------------//
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wire CLK_50MHZ, MASTER_RST;
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wire[11:0] XCOORD;
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wire[11:0] YCOORD;
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wire L_BUTTON, R_BUTTON, M_BUTTON;
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reg[8:0] TRIGGER_LEVEL;
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//----------------------//
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// REGISTERS //
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//----------------------//
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//----------------------//
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// TESTING //
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//----------------------//
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output TEST_in_range_Trig;
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wire TEST_in_range_Trig;
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//==================================================================//
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// FUNCTIONAL DEFINITIONS //
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//==================================================================//
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//------------------------------------------------------------------//
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// INTERMEDIATES //
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//------------------------------------------------------------------//
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wire Lrise, Lfall;
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reg Lbuf;
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always @ (posedge CLK_50MHZ or posedge MASTER_RST) begin
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if(MASTER_RST == 1'b1)
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Lbuf <= 1'b0;
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else
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Lbuf <= L_BUTTON;
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end
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assign Lrise = (!Lbuf & L_BUTTON);
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assign Lfall = ( Lbuf & !L_BUTTON);
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//------------------------------------------------------------------//
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// TRIGGER //
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//------------------------------------------------------------------//
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reg in_range_Trig;
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reg Ldrag_Trig;
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always @ (YCOORD or XCOORD or TRIGGER_LEVEL) begin
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in_range_Trig = (((YCOORD >= TRIGGER_LEVEL-1'b1) && (YCOORD <= TRIGGER_LEVEL+1'b1)) && ((XCOORD >= 10'd556 && XCOORD <= 10'd558)));
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end
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assign TEST_in_range_Trig = in_range_Trig;
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always @ (posedge CLK_50MHZ or posedge MASTER_RST) begin
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if(MASTER_RST)
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Ldrag_Trig <= 1'b0;
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else if(Lrise && in_range_Trig)
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Ldrag_Trig <= 1'b1;
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else if(Lfall)
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Ldrag_Trig <= 1'b0;
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else
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Ldrag_Trig <= Ldrag_Trig;
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end
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always @ (posedge CLK_50MHZ or posedge MASTER_RST) begin
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if(MASTER_RST)
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TRIGGER_LEVEL <= 9'd200;
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else if(Ldrag_Trig)
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TRIGGER_LEVEL <= YCOORD;
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else
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TRIGGER_LEVEL <= TRIGGER_LEVEL;
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end
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endmodule
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