[澳门在线教程]如何将鼠标与Basys 3 现场可编程门阵列接口-澳门在线4student.com

上次，我提出了一个现场可编程门阵列教程关于如何控制 4位7段显示在 Basys 3 现场可编程门阵列板。充分 Verilog 和甚高密度脂蛋白显示4位数字的代码 7段显示的现场可编程门阵列 Basys 3 还提供了。

这个现场可编程门阵列教程告诉您如何将鼠标与 Xilinx Basys 3 现场可编程门阵列板。的现场可编程门阵列教程还提供了 Verilog代码用于与鼠标接口现场可编程门阵列 Basys 3.

机载辅助功能微控制器 PIC24FJ128 允许 Basys 3 现场可编程门阵列具有 USB HID主机能力。一旦现场可编程门阵列被编程，微控制器在 USB HID 主机模式可以连接现场可编程门阵列与鼠要么键盘连接到 USB A型连接器（J2）如下图所示。

如图所示如上图所示，微控制器的PS2_CLK和PS2_DAT信号用于实现 PS / 2接口 for communication 与鼠要么键盘. The other signals 是 to program the 现场可编程门阵列 from a USB随身碟连接到 USB-HID端口（J2）当JP1编程模式跳线设置为“ USB”时。
在这个现场可编程门阵列教程，我们只关注板载的PS / 2接口微控制器与鼠标通信。在这种情况下，微控制器的行为就像 PS / 2总线和连接到 USB-HID端口可以使用两线制（时钟和数据）串行总线（PS / 2协议）与现场可编程门阵列作为主持人。鼠标将时钟和数据信号发送到现场可编程门阵列 when it is moved as shown in the following figure; otherwise, these signals 是 held high.

11位字数据包括‘0’起始位，8位数据（最低位首先），一个奇偶校验位，然后是‘1’停止位。三个11位字从鼠标转移到现场可编程门阵列，如下图所示。

鼠标的三字节移动数据包括鼠标状态字节，X方向字节和Y方向字节。该数据仅在时钟信号的下降沿有效。 X方向和Y方向字节用于显示鼠标的相对坐标，该鼠标左右移动将生成正/负X，而移动到顶部/底部将生成正/负Y。鼠标状态字节用作X和Y的“符号”位。 X 和 Y the 鼠标速度更快； XY和YY位指示运动溢出。鼠标状态字节中的L和R位用于指示是否按下了鼠标的向左和向右按钮。

简而言之，鼠标总是发送上图所示格式的33位数据信号到 Basys 3 现场可编程门阵列每当鼠标移动时。左键单击状态显示在数据的第二位，而第三位表示右键单击状态 of the 鼠. X和Y坐标 are 分别从33位数据的第13至20位和24至30位发送。

在这个现场可编程门阵列教程, a Verilog代码用于与鼠标接口现场可编程门阵列 Basys 3 被呈现。每次单击鼠标左键，都会在显示屏的7段显示屏上显示一个4位数字。 Basys 3 现场可编程门阵列板增加一。另一方面，鼠标右键单击将显示的数字减一。

Verilog代码用于与鼠标接口 Basys 3 现场可编程门阵列板:

// hzgifts.cn: 现场可编程门阵列项目, Verilog projects, 甚高密度脂蛋白 projects
// 现场可编程门阵列教程: 如何将鼠标与Basys 3 现场可编程门阵列接口 
// Verilog代码 用于将鼠标与Basys 3接口 现场可编程门阵列 board 
module 鼠_basys3_澳门在线(
    input clock_100Mhz, // 100 Mhz clock source on Basys 3 现场可编程门阵列
    input reset, // reset
    input Mouse_Data, // Mouse PS2 data
    input Mouse_Clk, // Mouse PS2 Clock
    output reg [3:0] Anode_Activate, // anode signals 的  the 7-segment LED display
    output reg [6:0] LED_out// cathode patterns 的  the 7-segment LED display
    );
    reg [5:0] Mouse_bits; // count number 的  bits receiving from the PS2 鼠 
    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 和 decreased by the 鼠 
    reg [3:0] LED_BCD;
 // Signals for displaying on 7-segment LED 的  Basys 3 现场可编程门阵列 
    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 的  bits receiving from the Mouse Data 
 // 33 bits to be received from the Mouse 
    always @(posedge Mouse_Clk 要么 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 要么 posedge reset)
    begin
        if(reset)
            displayed_number <= 0;
        else begin
            if(Mouse_bits==1) begin
                if(Mouse_Data==1) // if The 鼠 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 鼠 is right clicked, decrease the number 
                   displayed_number <= displayed_number - 1;
                end
        end 
    end    
     // refreshing the 4位7段显示 on Basys 3 现场可编程门阵列 
    always @(posedge clock_100Mhz 要么 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 和 Deactivate LED2, LED3, LED4
            LED_BCD = displayed_number/1000;
            // the first digit 的  the 16-bit number
              end
        2'b01: begin
            Anode_Activate = 4'b1011; 
            // activate LED2 和 Deactivate LED1, LED3, LED4
            LED_BCD = (displayed_number % 1000)/100;
            // the second digit 的  the 16-bit number
              end
        2'b10: begin
            Anode_Activate = 4'b1101; 
            // activate LED3 和 Deactivate LED2, LED1, LED4
            LED_BCD = ((displayed_number % 1000)%100)/10;
            // the third digit 的  the 16-bit number
                end
        2'b11: begin
            Anode_Activate = 4'b1110; 
            // activate LED4 和 Deactivate LED2, LED3, LED1
            LED_BCD = ((displayed_number % 1000)%100)%10;
            // the fourth digit 的  the 16-bit number    
               end
        endcase
    end
    // Cathode patterns 的  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

销约束文件用于将鼠标与Basys 3接口现场可编程门阵列:

# fpga4student.com: 现场可编程门阵列 projects, Verilog projects, 甚高密度脂蛋白 projects
# 现场可编程门阵列 tutorial: How to interface a 鼠 with Basys 3 现场可编程门阵列 
# Verilog代码 for interfacing a 鼠 with the Basys 3 现场可编程门阵列 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]}]