= = = = = = Basys 3键盘演示 ====== {{: nexys4-ddr: n4k.png ?nolink&600|}} =====概述===== ====描述====键盘演示项目演示了Basys3的USB-HID和USB-UART端口的简单用法。行为如下:*用户按下键盘上的一个键，通过USB-HID端口将键盘PS/2扫描码发送到Basys3。该扫描码通过USB-UART桥接器读取并传输到终端应用程序。释放密钥时，发送扫描码F0XX，表示释放PS/2码XX的密钥。= = = =功能使用 ==== | ^ 不习惯使用^ ^ ^ 16 X用户开关| | | ^ 16 X用户led | | | ^ 5 X用户按钮| | | ^ 4位7-segment显示X | | | ^ 4 X Pmod连接器| | | ^ XADC模拟输入X | | | ^ 12位X VGA输出| | | ^ USB-UART桥| | | X ^串行Flash应用程序数据X | | | ^ USB HID主机用鼠标X | | | ^USB HID Host with keyboard | | X | ------- ===== Prerequisites ===== ===Hardware=== * **Basys3 FPGA board** * **Micro-USB cable** * **USB Keyboard** ===Software=== * **Vivado Design Suite 2016.4** * //Newer versions can be used, but the procedure may vary slightly// ----- ===== Downloads ===== Basys3 Keyboard Project Repository -- [[https://github.com/Digilent/Basys-3-Keyboard/releases/download/v2016.4-1/Basys-3-Keyboard-2016.4-1.zip|ZIP Archive]] [[https://github.com/Digilent/Basys-3-Keyboard|GIT Repo]] ------- ===== Download and Launch the Basys 3 Keyboard Demo ===== >1) Follow the [[:learn:programmable-logic:tutorials:github-demos:start|Using Digilent Github Demo Projects]] Tutorial. This is an HDL design project, and as such does not support Vivado SDK, select the tutorial options appropriate for a Vivado-only design. Return to this guide when prompted to check for extra hardware requirements and setup. >2) In order to fully use this demo, you will need to connect a serial terminal to your Basys 3. Plug your board into your computer with a Micro USB cable and make sure that board is turned on. Then open a serial terminal (such as TeraTerm) on your computer. In the terminal application setup the serial port to connect to the appropriate port for your board, with a baud rate of 9600. Then return to the Github Projects Tutorial to finish programming and running the demo. > >{{:learn:programmable-logic:tutorials:cmod-a7-user-demo:tera-setup.png?300|}} {{:learn:programmable-logic:tutorials:cmod-a7-user-demo:setup.png?300|}} ===== Using the Basys 3 Keyboard Demo ===== ==== 1. Key Press ==== >When a button is pressed, the value of the scan code will be converted to ASCII and transmitted to the terminal. In the picture, 'a' is pressed, so a scan code of "1C" is sent to the terminal. The expected scan code for each key can be found in the keyboard diagram at the top of this guide. > >{{:learn:programmable-logic:tutorials:basys-3-keyboard-demo:keypress.jpg?nolink&500|}} ==== 2. Key Release ==== >When the 'a' key is released, a scan code of "F0 1C" is sent over UART. > >{{:learn:programmable-logic:tutorials:basys-3-keyboard-demo:keyrelease.jpg?nolink&500|}} ==== 3. Multiple Key Presses ==== >When multiple keys are pressed their scan codes are sent over UART in order. In this case, Q ("15") was pressed, followed by W ("1D"). > >{{:learn:programmable-logic:tutorials:basys-3-keyboard-demo:twokey.jpg?nolink&500|}} {{tag>learn programmable-logic project basys-3}}