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Arty A7-100T GPIO Demo


This project is a Vivado demo using the Arty A7's Switches, LEDs, RGB LED's, Pushbuttons, and USB UART bridge, written in VHDL. When programmed onto the board, the switches are tied to the LEDs. Every time a switch is pushed on, the corresponding LED will light up. The RGB LED smoothly transitions between colors. On reset, the Cmod A7-35T sends the line “ARTY GPIO/UART DEMO!” to the serial terminal. Whenever one of the buttons is pressed, the line “Button press detected!” is sent.

To use the USB-UART bridge feature of this demo, the Arty A7-100T must be connected to a serial terminal on the computer it is connected to over the MicroUSB cable. For more information on how to set up and use a serial terminal, such as Tera Term or PuTTY, refer to this tutorial.


Demo Setup

  1. Download and extract the most recent release ZIP archive from this repository's Releases Page.
  2. Open the project in Vivado 2018.2 by double clicking on the included XPR file found at "<archive extracted location>/vivado_proj/Arty-A7-100-GPIO.xpr".
  3. In the Flow Navigator panel on the left side of the Vivado window, click Open Hardware Manager.
  4. Plug the Arty A7-100T into the computer using a MicroUSB cable.
  5. Open a serial terminal emulator (such as TeraTerm) and connect it to the Arty A7-100T's serial port, using a baud rate of 9600.
  6. In the green bar at the top of the Vivado window, click Open target. Select Auto connect from the drop down menu.
  7. In the green bar at the top of the Vivado window, click Program device.
  8. In the Program Device Wizard, enter "<archive extracted location>vivado_proj/Arty-A7-100-GPIO.runs/impl_1/GPIO_Demo.bit" into the "Bitstream file" field. Then click Program.
  9. The demo will now be programmed onto the Arty A7-100T. See the Description section of this README to learn how to interact with this demo.

Next Steps

This demo can be used as a basis for other projects, either by adding sources included in the demo's release to those projects, or by modifying the sources in the release project.

Check out the Arty A7-100T's Resource Center to find more documentation, demos, and tutorials.

For technical support or questions, please post on the Digilent Forum.

Additional Notes

For more information on how this project is version controlled, refer to the Digilent Vivado Scripts Repository