Nexys 4 DDR GPIO Demo

The Basic User Demo project demonstrates a simple use of the Nexys4-DDR's GPIOs and UART port. The behavior is as follows:

• The 16 User LEDs are tied to the 16 User Switches.
• The 7-Segment display counts from 0 to 9 on each of its 8 digits. 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.
• 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.
• The demo is reset whenever BTNC is pressed.

• Nexys 4 DDR FPGA board
• Micro-USB cable
• Set of headphones or a speaker

• Vivado Design Suite 2016.4
  • Newer versions can be used, but the procedure may vary slightly
• Nexys 4 DDR Support Files
  • These files will describeGPIOinterfaces on your board and make it easier to select your FPGA board and addGPIOIP blocks.
  • Follow the Wiki guide:Vivado Board Files for Digilent 7-Series FPGA Boardson how to install Board Support Files for

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Nexys 4 DDRGPIODemo 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,和苏ch 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 the demo, you will need to connect a serial terminal to your Nexys DDR. Plug your board into your computer with Micro USB cables attached to the PROG+UART port 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.