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Basys3_Master.xdc

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+# fpga4student.com: FPGA projects, Verilog projects, VHDL projects
+# FPGA tutorial: How to interface a mouse with Basys 3 FPGA 
+# Verilog code for interfacing a mouse with the Basys 3 FPGA board  
+##USB HID (PS/2)
+ set_property PACKAGE_PIN C17 [get_ports Mouse_Clk]                        
+     set_property IOSTANDARD LVCMOS33 [get_ports Mouse_Clk]
+     set_property PULLUP true [get_ports Mouse_Clk]
+ set_property PACKAGE_PIN B17 [get_ports Mouse_Data]                    
+     set_property IOSTANDARD LVCMOS33 [get_ports Mouse_Data]    
+     set_property PULLUP true [get_ports Mouse_Data]
+# Clock signal
+set_property PACKAGE_PIN W5 [get_ports clock_100Mhz]       
+ set_property IOSTANDARD LVCMOS33 [get_ports clock_100Mhz]
+set_property PACKAGE_PIN R2 [get_ports reset]     
+ set_property IOSTANDARD LVCMOS33 [get_ports reset]
+#seven-segment LED display
+set_property PACKAGE_PIN W7 [get_ports {LED_out[6]}]                    
+   set_property IOSTANDARD LVCMOS33 [get_ports {LED_out[6]}]
+set_property PACKAGE_PIN W6 [get_ports {LED_out[5]}]                    
+   set_property IOSTANDARD LVCMOS33 [get_ports {LED_out[5]}]
+set_property PACKAGE_PIN U8 [get_ports {LED_out[4]}]                    
+   set_property IOSTANDARD LVCMOS33 [get_ports {LED_out[4]}]
+set_property PACKAGE_PIN V8 [get_ports {LED_out[3]}]                    
+   set_property IOSTANDARD LVCMOS33 [get_ports {LED_out[3]}]
+set_property PACKAGE_PIN U5 [get_ports {LED_out[2]}]                    
+   set_property IOSTANDARD LVCMOS33 [get_ports {LED_out[2]}]
+set_property PACKAGE_PIN V5 [get_ports {LED_out[1]}]                    
+   set_property IOSTANDARD LVCMOS33 [get_ports {LED_out[1]}]
+set_property PACKAGE_PIN U7 [get_ports {LED_out[0]}]                    
+   set_property IOSTANDARD LVCMOS33 [get_ports {LED_out[0]}]
+set_property PACKAGE_PIN U2 [get_ports {Anode_Activate[0]}]                    
+   set_property IOSTANDARD LVCMOS33 [get_ports {Anode_Activate[0]}]
+set_property PACKAGE_PIN U4 [get_ports {Anode_Activate[1]}]                    
+   set_property IOSTANDARD LVCMOS33 [get_ports {Anode_Activate[1]}]
+set_property PACKAGE_PIN V4 [get_ports {Anode_Activate[2]}]               
+   set_property IOSTANDARD LVCMOS33 [get_ports {Anode_Activate[2]}]
+set_property PACKAGE_PIN W4 [get_ports {Anode_Activate[3]}]          
+   set_property IOSTANDARD LVCMOS33 [get_ports {Anode_Activate[3]}]

mouse_basys3_FPGA.v

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+// fpga4student.com: FPGA projects, Verilog projects, VHDL projects
+// FPGA tutorial: How to interface a mouse with Basys 3 FPGA 
+// Verilog code for interfacing a mouse with the Basys 3 FPGA board 
+module mouse_basys3_FPGA(
+    input clock_100Mhz, // 100 Mhz clock source on Basys 3 FPGA
+    input reset, // reset
+    input Mouse_Data, // Mouse PS2 data
+    input Mouse_Clk, // Mouse PS2 Clock
+    output reg [3:0] Anode_Activate, // anode signals of the 7-segment LED display
+    output reg [6:0] LED_out// cathode patterns of the 7-segment LED display
+    );
+    reg [5:0] Mouse_bits; // count number of bits receiving from the PS2 mouse 
+    reg [26:0] one_second_counter; // counter for generating 1 second clock enable
+    wire one_second_enable;// one second enable for counting numbers
+    reg [15:0] displayed_number; // Number to be increased and decreased by the mouse 
+    reg [3:0] LED_BCD;
+ // Signals for displaying on 7-segment LED of Basys 3 FPGA 
+    reg [20:0] refresh_counter; // the first 19-bit for creating 190Hz refresh rate
+             // the other 2-bit for creating 4 LED-activating signals
+    wire [1:0] LED_activating_counter; 
+ // counting the number of bits receiving from the Mouse Data 
+ // 33 bits to be received from the Mouse 
+    always @(posedge Mouse_Clk or posedge reset)
+    begin
+        if(reset==1)
+            Mouse_bits <= 0;
+        else if(Mouse_bits <=31) 
+            Mouse_bits <= Mouse_bits + 1;
+        else 
+             Mouse_bits <= 0;
+    end
+ // Increase/Decrease the number when pressing Left/Right Mouse 
+    always @(negedge Mouse_Clk or posedge reset)
+    begin
+        if(reset)
+            displayed_number <= 0;
+        else begin
+            if(Mouse_bits==1) begin
+                if(Mouse_Data==1) // if The mouse is left clicked, increase the number 
+                   displayed_number <= displayed_number + 1;
+            end
+            else if(Mouse_bits==2) begin
+               if(Mouse_Data==1&&displayed_number>0)// if The mouse is right clicked, decrease the number 
+                   displayed_number <= displayed_number - 1;
+                end
+        end 
+    end    
+     // refreshing the 4-digit 7-segment display on Basys 3 FPGA 
+    always @(posedge clock_100Mhz or posedge reset)
+    begin 
+        if(reset==1)
+            refresh_counter <= 0;
+        else
+            refresh_counter <= refresh_counter + 1;
+    end 
+    assign LED_activating_counter = refresh_counter[20:19];
+    // anode activating signals for 4 LEDs
+    // decoder to generate anode signals 
+    always @(*)
+    begin
+        case(LED_activating_counter)
+        2'b00: begin
+            Anode_Activate = 4'b0111; 
+            // activate LED1 and Deactivate LED2, LED3, LED4
+            LED_BCD = displayed_number/1000;
+            // the first digit of the 16-bit number
+              end
+        2'b01: begin
+            Anode_Activate = 4'b1011; 
+            // activate LED2 and Deactivate LED1, LED3, LED4
+            LED_BCD = (displayed_number % 1000)/100;
+            // the second digit of the 16-bit number
+              end
+        2'b10: begin
+            Anode_Activate = 4'b1101; 
+            // activate LED3 and Deactivate LED2, LED1, LED4
+            LED_BCD = ((displayed_number % 1000)%100)/10;
+            // the third digit of the 16-bit number
+                end
+        2'b11: begin
+            Anode_Activate = 4'b1110; 
+            // activate LED4 and Deactivate LED2, LED3, LED1
+            LED_BCD = ((displayed_number % 1000)%100)%10;
+            // the fourth digit of the 16-bit number    
+               end
+        endcase
+    end
+    // Cathode patterns of the 7-segment LED display 
+    always @(*)
+    begin
+        case(LED_BCD)
+        4'b0000: LED_out = 7'b0000001; // "0"     
+        4'b0001: LED_out = 7'b1001111; // "1" 
+        4'b0010: LED_out = 7'b0010010; // "2" 
+        4'b0011: LED_out = 7'b0000110; // "3" 
+        4'b0100: LED_out = 7'b1001100; // "4" 
+        4'b0101: LED_out = 7'b0100100; // "5" 
+        4'b0110: LED_out = 7'b0100000; // "6" 
+        4'b0111: LED_out = 7'b0001111; // "7" 
+        4'b1000: LED_out = 7'b0000000; // "8"     
+        4'b1001: LED_out = 7'b0000100; // "9" 
+        default: LED_out = 7'b0000001; // "0"
+        endcase
+    end
+ endmodule