Nexys 4GPIO Demo

The Basic User Demo project demonstrates a simple usage of the Nexys4'sGPIOand UART. The behavior is as follows:

• 16个用户LED与16个用户开关绑定。按下中心使用器按钮时，LED被绑定到GND
• The 7-Segment display counts from 0 to 9 on each of its 8 digits. This count is reset when the center button is pressed. Also, single anodes of the 7-Segment display are blanked by holding BTNU, BTNL, BTND, or BTNR. Holding the center button blanks all the 7-Segment anodes.
• An introduction message is sent across the UART when the device is finished being configured, and after the center User button is pressed.
• A message is sent over UART whenever BTNU, BTNL, BTND, or BTNR is pressed.
• The Tri-Color LEDs cycle through several colors in a ~4 second loop
• 数据from the microphone is collected and transmitted over the mono audio out port.
• Note that the center user button behaves as a user reset button

All UART communication can be captured by attaching the UART port to a computer running a Terminal program with 9600 Baud Rate, 8 data bits, no parity, and 1 stop bit.

• Nexys4 FPGA board
• Micro-USB cable
• Headphones or speaker

• Vivado Design Suite 2016.4
  • Newer versions can be used, but the procedure may vary slightly

Nexys 4GPIODemo Project Repository –邮政编码GIT Repo

1) Follow theUsing Digilent Github Demo Projects教程。这是一个HDL设计项目，因此不支持Vivado SDK，请选择适用于仅体内设计的教程选项。当提示检查额外的硬件要求和设置时，请返回本指南。

2) In order to fully use the demo, you will need to connect a serial terminal to your Nexys 4. Plug your board into your computer with a Micro USB cable and make sure the 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.

For this section, all the switches are tied to their correspondingLED. Every time a switch is toggled, theLEDdirectly above it will toggle with it. If the center push button is pressed, all the LEDs will be tied to ground

The 7-segment display counts from 0 to 9 on each of its 8 digits. This count is reset when the center button is pressed. Also, single anodes of the 7-segment display are blanked by holding BTNU, BTNL, BTND, or BTNR. Holding the center button blanks all the 7-Segment anodes.

The two tri-color LEDs are set to gradually change colors at all times. The user cannot affect them in this demonstration.

The microphone which is next to Pmod connector JC, records audio data and sends it to the mono audio output located at J8. To listen to the mics output, you will need to plug in headphones or a speaker.

On startup or reset of the demo, the message “NEXYS4GPIO/UART DEMO!” is sent over UART to your serial terminal application. Whenever the right, left, up, or down button is pressed, the message “Button press detected!” will be sent.