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[/] [alternascope/] [branches/] [Alpha/] [Mouse/] [d_DriverMouse.v] - Blame information for rev 30

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//==================================================================//
// File:    d_MouseDriver.v                                         //
// Version: 0.0.0.1                                                 //
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -//
// Copyright (C) Stephen Pickett                                    //
//   Apr 28, 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 28, 2005   Under Development                 //
//                                                                  //
//==================================================================//
 
module Driver_mouse(
    CLK_50MHZ, MASTER_RST,
    PS2C, PS2D,
    XCOORD, YCOORD,
    L_BUTTON, R_BUTTON, M_BUTTON
    );
 
//==================================================================//
// DEFINITIONS                                                      //
//==================================================================//
parameter ss_CLK_LOW_100US    = 4'b0000;
parameter ss_DATA_LOW         = 4'b0001;
parameter ss_SET_BIT_0        = 4'b0011;
parameter ss_SET_BIT_1        = 4'b0010;
parameter ss_SET_BIT_2        = 4'b0110;
parameter ss_SET_BIT_3        = 4'b0111;
parameter ss_SET_BIT_4        = 4'b0101;
parameter ss_SET_BIT_5        = 4'b0100;
parameter ss_SET_BIT_6        = 4'b1100;
parameter ss_SET_BIT_7        = 4'b1101;
parameter ss_SET_BIT_PARITY   = 4'b1111;
parameter ss_SET_BIT_STOP     = 4'b1110;
parameter ss_WAIT_BIT_ACK     = 4'b1010;
parameter ss_GET_MOVEMENT     = 4'b1000;
 
parameter P_Lbut_index  = 1;
parameter P_Mbut_index  = 2;
parameter P_Rbut_index  = 3;
 
 
//==================================================================//
// VARIABLE DEFINITIONS                                             //
//==================================================================//
//----------------------//
// INPUTS               //
//----------------------//
input CLK_50MHZ;            // System wide clock
input MASTER_RST;           // System wide reset
inout PS2C;                 // PS2 clock
inout PS2D;                 // PS2 data
 
//----------------------//
// OUTPUTS              //
//----------------------//
output[11:0] XCOORD;        // X coordinate of the cursor
output[11:0] YCOORD;        // Y coordinate of the cursor
output L_BUTTON, R_BUTTON, M_BUTTON;
 
//----------------------//
// WIRES / NODES        //
//----------------------//
wire CLK_50MHZ, MASTER_RST;
wire PS2C, PS2D;
reg[11:0] XCOORD;
reg[11:0] YCOORD;
reg L_BUTTON, R_BUTTON, M_BUTTON;
 
//----------------------//
// REGISTERS            //
//----------------------//
reg[12:0] Counter_timer;
reg[5:0]  Counter_bits;
reg[3:0]  sm_ps2mouse;
reg[32:0] data_in_buf;
 
 
 
 
//==================================================================//
// FUNCTIONAL DEFINITIONS                                           //
//==================================================================//
 
//------------------------------------------------------------------//
// INTERMEDIATE VALUES                                              //
//------------------------------------------------------------------//
reg[7:0]  Counter_PS2C;
reg       CLK_ps2c_debounced;
 
// Debounce the PS2C line.
//  The mouse is generally not outputting a nice rising clock edge.
//  To eliminate the false edge detection, make sure it is high/low
//  for at least 256 counts (5.12us off 50MHz) before triggering the CLK.
always @ (posedge CLK_50MHZ or posedge MASTER_RST) begin
    if(MASTER_RST == 1'b1) begin
        Counter_PS2C <= 8'b0;
    end else begin
        if(PS2C == 1'b1) begin
            if(Counter_PS2C == 8'hFF)
                Counter_PS2C <= Counter_PS2C;
            else
                Counter_PS2C <= Counter_PS2C + 1;
        end else begin
            if(Counter_PS2C == 8'b0)
                Counter_PS2C <= Counter_PS2C;
            else
                Counter_PS2C <= Counter_PS2C - 1;
        end
    end
end
 
always @ (posedge CLK_50MHZ or posedge MASTER_RST) begin
    if(MASTER_RST == 1'b1)
        CLK_ps2c_debounced <= 1'b0;
    else if(Counter_PS2C == 8'b0)
        CLK_ps2c_debounced <= 1'b0;
    else if(Counter_PS2C == 8'hFF)
        CLK_ps2c_debounced <= 1'b1;
    else
        CLK_ps2c_debounced <= CLK_ps2c_debounced;
end
 
 
//------------------------------------------------------------------//
// INTERPRETING MOVEMENTS                                           //
//------------------------------------------------------------------//
reg[7:0] xcoord_buf;
reg[7:0] ycoord_buf;
 
always @ (posedge CLK_50MHZ or posedge MASTER_RST) begin
    if(MASTER_RST == 1'b1) begin
        xcoord_buf <= 8'b0;
    end else if(data_in_buf[5] == 1'b0) begin
        xcoord_buf <= data_in_buf[19:12];
    end else begin
        xcoord_buf <= ((~(data_in_buf[19:12]))+1);
    end
end
 
always @ (posedge CLK_50MHZ or posedge MASTER_RST) begin
    if(MASTER_RST == 1'b1) begin
        ycoord_buf <= 8'b0;
    end else if(data_in_buf[6] == 1'b0) begin
        ycoord_buf <= data_in_buf[30:23];
    end else begin
        ycoord_buf <= ((~(data_in_buf[30:23]))+1);
    end
end
 
 
always @ (posedge CLK_ps2c_debounced or posedge MASTER_RST) begin
    if(MASTER_RST == 1'b1) begin
        XCOORD <= 12'd320;
    end else if(Counter_bits == 6'd32 && (data_in_buf[7] == 1'b0)) begin
        if(data_in_buf[5] == 1'b1) begin    // NEGITIVE
            if(XCOORD <= xcoord_buf)
                XCOORD <= 12'b0;
            else
                XCOORD <= XCOORD - xcoord_buf;
        end else begin  // POSITIVE
            if((XCOORD + xcoord_buf) >= 12'd639)
                XCOORD <= 12'd639;
            else
                XCOORD <= XCOORD + xcoord_buf;
        end
    end else begin
        XCOORD <= XCOORD;
    end
end
 
always @ (posedge CLK_ps2c_debounced or posedge MASTER_RST) begin
    if(MASTER_RST == 1'b1) begin
        YCOORD <= 12'd199;
    end else if(Counter_bits == 6'd32 && (data_in_buf[8] == 1'b0)) begin
        if(data_in_buf[6] == 1'b0) begin
            if( (YCOORD < 12'd401) && ((YCOORD + ycoord_buf) >= 12'd401) )
                YCOORD <= 12'd400;
            else if( ((YCOORD >= 12'd441) /*&& (YCOORD <= 12'd520)*/) && ((YCOORD + ycoord_buf) > 12'd520) )
                YCOORD <= (YCOORD + ycoord_buf) - 12'd521;
            else
                YCOORD <= YCOORD + ycoord_buf;
        end else begin
            if( /*(YCOORD < 12'd401) &&*/ (YCOORD < ycoord_buf) )
                YCOORD <= 12'd521 - ycoord_buf;
            else if( (YCOORD >= 12'd441) && ((YCOORD-12'd441) < ycoord_buf) )
                YCOORD <= 12'd441;
            else
                YCOORD <= YCOORD - ycoord_buf;
        end
    end else begin
        YCOORD <= YCOORD;
    end
end
 
//------------------------------------------------------------------//
// INTERPRETING BUTTONS                                             //
//------------------------------------------------------------------//
always @ (posedge CLK_50MHZ or posedge MASTER_RST) begin
    if(MASTER_RST == 1'b1) begin
        L_BUTTON <= 1'b0;
        M_BUTTON <= 1'b0;
        R_BUTTON <= 1'b0;
    end else if(Counter_bits == 6'd32) begin
        L_BUTTON <= data_in_buf[P_Lbut_index];
        M_BUTTON <= data_in_buf[P_Mbut_index];
        R_BUTTON <= data_in_buf[P_Rbut_index];
    end else begin
        L_BUTTON <= L_BUTTON;
        M_BUTTON <= M_BUTTON;
        R_BUTTON <= R_BUTTON;
    end
end
 
 
 
 
//------------------------------------------------------------------//
// SENDING DATA                                                     //
//------------------------------------------------------------------//
reg PS2C_out, PS2D_out;
 
assign PS2C = PS2C_out;
assign PS2D = PS2D_out;
 
 
always @ (Counter_timer or MASTER_RST) begin
    if(MASTER_RST == 1'b1) begin
        PS2C_out = 1'bZ;
    end else if((Counter_timer <= 13'd5500) && (MASTER_RST == 1'b0))
        PS2C_out = 1'b0;
    else
        PS2C_out = 1'bZ;
end
 
always @ (sm_ps2mouse or Counter_timer or MASTER_RST) begin
    if(MASTER_RST == 1'b1) begin
        PS2D_out = 1'bZ;
    end else if(Counter_timer >= 13'd5000 && sm_ps2mouse == ss_DATA_LOW) begin
        PS2D_out = 1'b0;
    end else if(sm_ps2mouse == ss_SET_BIT_0) begin
        PS2D_out = 1'b0;
    end else if(sm_ps2mouse == ss_SET_BIT_1) begin
        PS2D_out = 1'b0;
    end else if(sm_ps2mouse == ss_SET_BIT_2) begin
        PS2D_out = 1'b1;
    end else if(sm_ps2mouse == ss_SET_BIT_3) begin
        PS2D_out = 1'b0;
    end else if(sm_ps2mouse == ss_SET_BIT_4) begin
        PS2D_out = 1'b1;
    end else if(sm_ps2mouse == ss_SET_BIT_5) begin
        PS2D_out = 1'b1;
    end else if(sm_ps2mouse == ss_SET_BIT_6) begin
        PS2D_out = 1'b1;
    end else if(sm_ps2mouse == ss_SET_BIT_7) begin
        PS2D_out = 1'b1;
    end else if(sm_ps2mouse == ss_SET_BIT_PARITY) begin
        PS2D_out = 1'b0;
    end else if(sm_ps2mouse == ss_SET_BIT_STOP) begin
        PS2D_out = 1'b1;
    end else begin
        PS2D_out = 1'bZ;
    end
end
 
//------------------------------------------------------------------//
// RECIEVING DATA                                                   //
//------------------------------------------------------------------//
always @ (negedge CLK_ps2c_debounced or posedge MASTER_RST) begin
    if(MASTER_RST == 1'b1) begin
        data_in_buf <= 33'b0;
    end else if(sm_ps2mouse == ss_GET_MOVEMENT) begin
        data_in_buf <= data_in_buf >> 1;
        data_in_buf[32] <= PS2D;
    end else
        data_in_buf <= data_in_buf;
end
 
 
 
//------------------------------------------------------------------//
// COUNTERS FOR STATE MACHINE                                       //
//------------------------------------------------------------------//
// COUNTER: timer
always @ (posedge CLK_50MHZ or posedge MASTER_RST) begin
    if(MASTER_RST == 1'b1)
        Counter_timer <= 13'b0;
    else if(Counter_timer == 13'd6000)
        Counter_timer <= Counter_timer;
    else
        Counter_timer <= Counter_timer + 1;
end
 
// COUNTER: rec_data_bit_cnt
always @ (negedge CLK_ps2c_debounced or posedge MASTER_RST) begin
    if(MASTER_RST == 1'b1) begin
        Counter_bits <= 6'd22;
    end else if(sm_ps2mouse == ss_GET_MOVEMENT) begin
        if(Counter_bits == 6'd32)
            Counter_bits <= 6'd0;
        else
            Counter_bits <= Counter_bits + 1;
    end else begin
        Counter_bits <= Counter_bits;
    end
end
 
 
//------------------------------------------------------------------//
// MOUSE STATE MACHINE                                              //
//------------------------------------------------------------------//
always @ (negedge CLK_ps2c_debounced or posedge MASTER_RST) begin
    if(MASTER_RST == 1'b1) begin
            sm_ps2mouse <= ss_DATA_LOW;
    end else if(sm_ps2mouse == ss_DATA_LOW) begin
            sm_ps2mouse <= ss_SET_BIT_0;
    end else if(sm_ps2mouse == ss_SET_BIT_0) begin
            sm_ps2mouse <= ss_SET_BIT_1;
    end else if(sm_ps2mouse == ss_SET_BIT_1) begin
            sm_ps2mouse <= ss_SET_BIT_2;
    end else if(sm_ps2mouse == ss_SET_BIT_2) begin
            sm_ps2mouse <= ss_SET_BIT_3;
    end else if(sm_ps2mouse == ss_SET_BIT_3) begin
            sm_ps2mouse <= ss_SET_BIT_4;
    end else if(sm_ps2mouse == ss_SET_BIT_4) begin
            sm_ps2mouse <= ss_SET_BIT_5;
    end else if(sm_ps2mouse == ss_SET_BIT_5) begin
            sm_ps2mouse <= ss_SET_BIT_6;
    end else if(sm_ps2mouse == ss_SET_BIT_6) begin
            sm_ps2mouse <= ss_SET_BIT_7;
    end else if(sm_ps2mouse == ss_SET_BIT_7) begin
            sm_ps2mouse <= ss_SET_BIT_PARITY;
    end else if(sm_ps2mouse == ss_SET_BIT_PARITY) begin
            sm_ps2mouse <= ss_SET_BIT_STOP;
    end else if(sm_ps2mouse == ss_SET_BIT_STOP) begin
            sm_ps2mouse <= ss_WAIT_BIT_ACK;
    end else if(sm_ps2mouse == ss_WAIT_BIT_ACK) begin
            sm_ps2mouse <= ss_GET_MOVEMENT;
    end else if(sm_ps2mouse == ss_GET_MOVEMENT) begin
            sm_ps2mouse <= sm_ps2mouse;
    end else begin
        sm_ps2mouse <= ss_DATA_LOW;
    end
end
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
endmodule
 

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[/] [alternascope/] [branches/] [Alpha/] [Mouse/] [d_DriverMouse.v] - Blame information for rev 30

Line No.	Rev	Author	Line
1	27	smpickett	`//==================================================================//`
2			`// File: d_MouseDriver.v //`
3			`// Version: 0.0.0.1 //`
4			`// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -//`
5			`// Copyright (C) Stephen Pickett //`
6			`// Apr 28, 2005 //`
7			`// //`
8			`// This program is free software; you can redistribute it and/or //`
9			`// modify it under the terms of the GNU General Public License //`
10			`// as published by the Free Software Foundation; either version 2 //`
11			`// of the License, or (at your option) any later version. //`
12			`// //`
13			`// This program is distributed in the hope that it will be useful, //`
14			`// but WITHOUT ANY WARRANTY; without even the implied warranty of //`
15			`// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //`
16			`// GNU General Public License for more details. //`
17			`// //`
18			`// If you have not received a copy of the GNU General Public License//`
19			`// along with this program; write to: //`
20			`// Free Software Foundation, Inc., //`
21			`// 51 Franklin Street, Fifth Floor, //`
22			`// Boston, MA 02110-1301, USA. //`
23			`// //`
24			`//------------------------------------------------------------------//`
25			`// Revisions: //`
26			`// Ver 0.0.0.1 Apr 28, 2005 Under Development //`
27			`// //`
28			`//==================================================================//`
29	2	smpickett
30			`module Driver_mouse(`
31			`CLK_50MHZ, MASTER_RST,`
32			`PS2C, PS2D,`
33			`XCOORD, YCOORD,`
34	5	smpickett	`L_BUTTON, R_BUTTON, M_BUTTON`
35	2	smpickett	`);`
36
37			`//==================================================================//`
38			`// DEFINITIONS //`
39			`//==================================================================//`
40			`parameter ss_CLK_LOW_100US = 4'b0000;`
41			`parameter ss_DATA_LOW = 4'b0001;`
42			`parameter ss_SET_BIT_0 = 4'b0011;`
43			`parameter ss_SET_BIT_1 = 4'b0010;`
44			`parameter ss_SET_BIT_2 = 4'b0110;`
45			`parameter ss_SET_BIT_3 = 4'b0111;`
46			`parameter ss_SET_BIT_4 = 4'b0101;`
47			`parameter ss_SET_BIT_5 = 4'b0100;`
48			`parameter ss_SET_BIT_6 = 4'b1100;`
49			`parameter ss_SET_BIT_7 = 4'b1101;`
50			`parameter ss_SET_BIT_PARITY = 4'b1111;`
51			`parameter ss_SET_BIT_STOP = 4'b1110;`
52			`parameter ss_WAIT_BIT_ACK = 4'b1010;`
53			`parameter ss_GET_MOVEMENT = 4'b1000;`
54
55			`parameter P_Lbut_index = 1;`
56			`parameter P_Mbut_index = 2;`
57			`parameter P_Rbut_index = 3;`
58
59
60			`//==================================================================//`
61			`// VARIABLE DEFINITIONS //`
62			`//==================================================================//`
63			`//----------------------//`
64			`// INPUTS //`
65			`//----------------------//`
66			`input CLK_50MHZ; // System wide clock`
67			`input MASTER_RST; // System wide reset`
68			`inout PS2C; // PS2 clock`
69			`inout PS2D; // PS2 data`
70
71			`//----------------------//`
72			`// OUTPUTS //`
73			`//----------------------//`
74			`output[11:0] XCOORD; // X coordinate of the cursor`
75			`output[11:0] YCOORD; // Y coordinate of the cursor`
76			`output L_BUTTON, R_BUTTON, M_BUTTON;`
77
78			`//----------------------//`
79			`// WIRES / NODES //`
80			`//----------------------//`
81			`wire CLK_50MHZ, MASTER_RST;`
82			`wire PS2C, PS2D;`
83			`reg[11:0] XCOORD;`
84			`reg[11:0] YCOORD;`
85			`reg L_BUTTON, R_BUTTON, M_BUTTON;`
86
87			`//----------------------//`
88			`// REGISTERS //`
89			`//----------------------//`
90			`reg[12:0] Counter_timer;`
91			`reg[5:0] Counter_bits;`
92			`reg[3:0] sm_ps2mouse;`
93			`reg[32:0] data_in_buf;`
94
95
96
97
98			`//==================================================================//`
99			`// FUNCTIONAL DEFINITIONS //`
100			`//==================================================================//`
101
102			`//------------------------------------------------------------------//`
103			`// INTERMEDIATE VALUES //`
104			`//------------------------------------------------------------------//`
105			`reg[7:0] Counter_PS2C;`
106			`reg CLK_ps2c_debounced;`
107
108			`// Debounce the PS2C line.`
109			`// The mouse is generally not outputting a nice rising clock edge.`
110			`// To eliminate the false edge detection, make sure it is high/low`
111	27	smpickett	`// for at least 256 counts (5.12us off 50MHz) before triggering the CLK.`
112	2	smpickett	`always @ (posedge CLK_50MHZ or posedge MASTER_RST) begin`
113			`if(MASTER_RST == 1'b1) begin`
114			`Counter_PS2C <= 8'b0;`
115			`end else begin`
116			`if(PS2C == 1'b1) begin`
117			`if(Counter_PS2C == 8'hFF)`
118			`Counter_PS2C <= Counter_PS2C;`
119			`else`
120			`Counter_PS2C <= Counter_PS2C + 1;`
121			`end else begin`
122			`if(Counter_PS2C == 8'b0)`
123			`Counter_PS2C <= Counter_PS2C;`
124			`else`
125			`Counter_PS2C <= Counter_PS2C - 1;`
126			`end`
127			`end`
128			`end`
129
130			`always @ (posedge CLK_50MHZ or posedge MASTER_RST) begin`
131			`if(MASTER_RST == 1'b1)`
132			`CLK_ps2c_debounced <= 1'b0;`
133			`else if(Counter_PS2C == 8'b0)`
134			`CLK_ps2c_debounced <= 1'b0;`
135			`else if(Counter_PS2C == 8'hFF)`
136			`CLK_ps2c_debounced <= 1'b1;`
137			`else`
138			`CLK_ps2c_debounced <= CLK_ps2c_debounced;`
139			`end`
140
141
142			`//------------------------------------------------------------------//`
143			`// INTERPRETING MOVEMENTS //`
144			`//------------------------------------------------------------------//`
145			`reg[7:0] xcoord_buf;`
146			`reg[7:0] ycoord_buf;`
147
148			`always @ (posedge CLK_50MHZ or posedge MASTER_RST) begin`
149			`if(MASTER_RST == 1'b1) begin`
150			`xcoord_buf <= 8'b0;`
151			`end else if(data_in_buf[5] == 1'b0) begin`
152			`xcoord_buf <= data_in_buf[19:12];`
153			`end else begin`
154			`xcoord_buf <= ((~(data_in_buf[19:12]))+1);`
155			`end`
156			`end`
157
158			`always @ (posedge CLK_50MHZ or posedge MASTER_RST) begin`
159			`if(MASTER_RST == 1'b1) begin`
160			`ycoord_buf <= 8'b0;`
161			`end else if(data_in_buf[6] == 1'b0) begin`
162			`ycoord_buf <= data_in_buf[30:23];`
163			`end else begin`
164			`ycoord_buf <= ((~(data_in_buf[30:23]))+1);`
165			`end`
166			`end`
167
168
169			`always @ (posedge CLK_ps2c_debounced or posedge MASTER_RST) begin`
170			`if(MASTER_RST == 1'b1) begin`
171			`XCOORD <= 12'd320;`
172			`end else if(Counter_bits == 6'd32 && (data_in_buf[7] == 1'b0)) begin`
173			`if(data_in_buf[5] == 1'b1) begin // NEGITIVE`
174			`if(XCOORD <= xcoord_buf)`
175			`XCOORD <= 12'b0;`
176			`else`
177			`XCOORD <= XCOORD - xcoord_buf;`
178			`end else begin // POSITIVE`
179	27	smpickett	`if((XCOORD + xcoord_buf) >= 12'd639)`
180	2	smpickett	`XCOORD <= 12'd639;`
181			`else`
182			`XCOORD <= XCOORD + xcoord_buf;`
183			`end`
184			`end else begin`
185			`XCOORD <= XCOORD;`
186			`end`
187			`end`
188
189			`always @ (posedge CLK_ps2c_debounced or posedge MASTER_RST) begin`
190			`if(MASTER_RST == 1'b1) begin`
191	11	smpickett	`YCOORD <= 12'd199;`
192	2	smpickett	`end else if(Counter_bits == 6'd32 && (data_in_buf[8] == 1'b0)) begin`
193	11	smpickett	`if(data_in_buf[6] == 1'b0) begin`
194	27	smpickett	`if( (YCOORD < 12'd401) && ((YCOORD + ycoord_buf) >= 12'd401) )`
195			`YCOORD <= 12'd400;`
196			`else if( ((YCOORD >= 12'd441) /&& (YCOORD <= 12'd520)/) && ((YCOORD + ycoord_buf) > 12'd520) )`
197			`YCOORD <= (YCOORD + ycoord_buf) - 12'd521;`
198	2	smpickett	`else`
199			`YCOORD <= YCOORD + ycoord_buf;`
200	11	smpickett	`end else begin`
201	27	smpickett	`if( /(YCOORD < 12'd401) &&/ (YCOORD < ycoord_buf) )`
202			`YCOORD <= 12'd521 - ycoord_buf;`
203			`else if( (YCOORD >= 12'd441) && ((YCOORD-12'd441) < ycoord_buf) )`
204			`YCOORD <= 12'd441;`
205	2	smpickett	`else`
206			`YCOORD <= YCOORD - ycoord_buf;`
207			`end`
208			`end else begin`
209			`YCOORD <= YCOORD;`
210			`end`
211			`end`
212
213			`//------------------------------------------------------------------//`
214			`// INTERPRETING BUTTONS //`
215			`//------------------------------------------------------------------//`
216			`always @ (posedge CLK_50MHZ or posedge MASTER_RST) begin`
217			`if(MASTER_RST == 1'b1) begin`
218			`L_BUTTON <= 1'b0;`
219			`M_BUTTON <= 1'b0;`
220			`R_BUTTON <= 1'b0;`
221			`end else if(Counter_bits == 6'd32) begin`
222			`L_BUTTON <= data_in_buf[P_Lbut_index];`
223			`M_BUTTON <= data_in_buf[P_Mbut_index];`
224			`R_BUTTON <= data_in_buf[P_Rbut_index];`
225			`end else begin`
226			`L_BUTTON <= L_BUTTON;`
227			`M_BUTTON <= M_BUTTON;`
228			`R_BUTTON <= R_BUTTON;`
229			`end`
230			`end`
231
232
233
234
235			`//------------------------------------------------------------------//`
236			`// SENDING DATA //`
237			`//------------------------------------------------------------------//`
238			`reg PS2C_out, PS2D_out;`
239
240			`assign PS2C = PS2C_out;`
241			`assign PS2D = PS2D_out;`
242
243
244			`always @ (Counter_timer or MASTER_RST) begin`
245			`if(MASTER_RST == 1'b1) begin`
246			`PS2C_out = 1'bZ;`
247			`end else if((Counter_timer <= 13'd5500) && (MASTER_RST == 1'b0))`
248			`PS2C_out = 1'b0;`
249			`else`
250			`PS2C_out = 1'bZ;`
251			`end`
252
253			`always @ (sm_ps2mouse or Counter_timer or MASTER_RST) begin`
254			`if(MASTER_RST == 1'b1) begin`
255			`PS2D_out = 1'bZ;`
256			`end else if(Counter_timer >= 13'd5000 && sm_ps2mouse == ss_DATA_LOW) begin`
257			`PS2D_out = 1'b0;`
258			`end else if(sm_ps2mouse == ss_SET_BIT_0) begin`
259			`PS2D_out = 1'b0;`
260			`end else if(sm_ps2mouse == ss_SET_BIT_1) begin`
261			`PS2D_out = 1'b0;`
262			`end else if(sm_ps2mouse == ss_SET_BIT_2) begin`
263			`PS2D_out = 1'b1;`
264			`end else if(sm_ps2mouse == ss_SET_BIT_3) begin`
265			`PS2D_out = 1'b0;`
266			`end else if(sm_ps2mouse == ss_SET_BIT_4) begin`
267			`PS2D_out = 1'b1;`
268			`end else if(sm_ps2mouse == ss_SET_BIT_5) begin`
269			`PS2D_out = 1'b1;`
270			`end else if(sm_ps2mouse == ss_SET_BIT_6) begin`
271			`PS2D_out = 1'b1;`
272			`end else if(sm_ps2mouse == ss_SET_BIT_7) begin`
273			`PS2D_out = 1'b1;`
274			`end else if(sm_ps2mouse == ss_SET_BIT_PARITY) begin`
275			`PS2D_out = 1'b0;`
276			`end else if(sm_ps2mouse == ss_SET_BIT_STOP) begin`
277			`PS2D_out = 1'b1;`
278			`end else begin`
279			`PS2D_out = 1'bZ;`
280			`end`
281			`end`
282
283			`//------------------------------------------------------------------//`
284			`// RECIEVING DATA //`
285			`//------------------------------------------------------------------//`
286			`always @ (negedge CLK_ps2c_debounced or posedge MASTER_RST) begin`
287			`if(MASTER_RST == 1'b1) begin`
288			`data_in_buf <= 33'b0;`
289			`end else if(sm_ps2mouse == ss_GET_MOVEMENT) begin`
290			`data_in_buf <= data_in_buf >> 1;`
291			`data_in_buf[32] <= PS2D;`
292			`end else`
293			`data_in_buf <= data_in_buf;`
294			`end`
295
296
297
298			`//------------------------------------------------------------------//`
299			`// COUNTERS FOR STATE MACHINE //`
300			`//------------------------------------------------------------------//`
301			`// COUNTER: timer`
302			`always @ (posedge CLK_50MHZ or posedge MASTER_RST) begin`
303			`if(MASTER_RST == 1'b1)`
304			`Counter_timer <= 13'b0;`
305			`else if(Counter_timer == 13'd6000)`
306			`Counter_timer <= Counter_timer;`
307			`else`
308			`Counter_timer <= Counter_timer + 1;`
309			`end`
310
311			`// COUNTER: rec_data_bit_cnt`
312			`always @ (negedge CLK_ps2c_debounced or posedge MASTER_RST) begin`
313			`if(MASTER_RST == 1'b1) begin`
314			`Counter_bits <= 6'd22;`
315			`end else if(sm_ps2mouse == ss_GET_MOVEMENT) begin`
316			`if(Counter_bits == 6'd32)`
317			`Counter_bits <= 6'd0;`
318			`else`
319			`Counter_bits <= Counter_bits + 1;`
320			`end else begin`
321			`Counter_bits <= Counter_bits;`
322			`end`
323			`end`
324
325
326			`//------------------------------------------------------------------//`
327			`// MOUSE STATE MACHINE //`
328			`//------------------------------------------------------------------//`
329			`always @ (negedge CLK_ps2c_debounced or posedge MASTER_RST) begin`
330			`if(MASTER_RST == 1'b1) begin`
331			`sm_ps2mouse <= ss_DATA_LOW;`
332			`end else if(sm_ps2mouse == ss_DATA_LOW) begin`
333			`sm_ps2mouse <= ss_SET_BIT_0;`
334			`end else if(sm_ps2mouse == ss_SET_BIT_0) begin`
335			`sm_ps2mouse <= ss_SET_BIT_1;`
336			`end else if(sm_ps2mouse == ss_SET_BIT_1) begin`
337			`sm_ps2mouse <= ss_SET_BIT_2;`
338			`end else if(sm_ps2mouse == ss_SET_BIT_2) begin`
339			`sm_ps2mouse <= ss_SET_BIT_3;`
340			`end else if(sm_ps2mouse == ss_SET_BIT_3) begin`
341			`sm_ps2mouse <= ss_SET_BIT_4;`
342			`end else if(sm_ps2mouse == ss_SET_BIT_4) begin`
343			`sm_ps2mouse <= ss_SET_BIT_5;`
344			`end else if(sm_ps2mouse == ss_SET_BIT_5) begin`
345			`sm_ps2mouse <= ss_SET_BIT_6;`
346			`end else if(sm_ps2mouse == ss_SET_BIT_6) begin`
347			`sm_ps2mouse <= ss_SET_BIT_7;`
348			`end else if(sm_ps2mouse == ss_SET_BIT_7) begin`
349			`sm_ps2mouse <= ss_SET_BIT_PARITY;`
350			`end else if(sm_ps2mouse == ss_SET_BIT_PARITY) begin`
351			`sm_ps2mouse <= ss_SET_BIT_STOP;`
352			`end else if(sm_ps2mouse == ss_SET_BIT_STOP) begin`
353			`sm_ps2mouse <= ss_WAIT_BIT_ACK;`
354			`end else if(sm_ps2mouse == ss_WAIT_BIT_ACK) begin`
355			`sm_ps2mouse <= ss_GET_MOVEMENT;`
356			`end else if(sm_ps2mouse == ss_GET_MOVEMENT) begin`
357			`sm_ps2mouse <= sm_ps2mouse;`
358			`end else begin`
359			`sm_ps2mouse <= ss_DATA_LOW;`
360			`end`
361			`end`
362
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375
376
377
378
379			`endmodule`
380