Genesys 2 USB Device Demo

NOTE: This project can only be programmed using Vivado/SDK 2015.4

The Genesys2 USB Device Demo project demonstrates the usage of the usb2device IP core on the Genesys2. . The behavior is as follows:

• The Genesys2 will act as a USB device, so the USB OTG port needs to be connected to a USB host.
• The USB IP should enumerate as a HID device (more specifically, as a mouse).
• BTNU, BTNL, BTND and BTNR will trigger interrupts if pressed. As a result, the Genesys2 will send HID reports that will cause the mouse pointer on the host to move in the corresponding direction (up, to the left, down or to the right).
• The UART terminal can be connected for debug purposes. It is configured to work at a baud rate of 115200 with 8 data bits, 1 stop bit, and no parity.

• Basic familiarity with SDK

• Genesys2 FPGA board
• Micro-USB cable
• Genesys2 Power Supply

• Xilinx SDK 2015.4

Genesys2 Support Repository – ZIP GIT Repo

1.1) Download the project zip file which can be downloaded here. Once you have downloaded the project, unzip it in the location of your choosing.

1.2) If you want to generate the project in Vivado, continue to step 2. If you want to move straight to Xilinx SDK, skip to step 5.

Generate the USB_Device_Demo project in the Projects folder by following this guide before continuing: How to Generate a Project from Digilent's Github. NOTE: This must be done in Vivado 2015.4

3.1) Click Generate Bitstream on the left hand menu towards the bottom. Vivado will run through both Run Synthesis and Run Implementation before it generates the bitstream automatically.

Note: If you want, you can click each step by itself in the order of Run Synthesis, Run Implementation and then Generate Bitstream.

4.1) Export the microblaze project by going to File→Export→Export Hardware. Click the check box to Include the bitstream, and export it local to project. This will create a .sdk folder in your project directory. Afterwards, click File→Launch SDK. Both the exported location and workspace should be left as <Local to Project>. Click “OK” to launch Xilinx SDK.

4.2) Skip to step 6.

5.1) Open up Xilinx SDK 2015.4 and create a workspace where your project will be saved.

6.1) In your project Explorer window on the left side, click File→Import, then under the general folder, select Existing projects. (Or just click Import Project on the main screen).

6.2) Navigate to where you saved the downloaded project, select the sdk folder, and click OK. In the Import window, click Finish to import the system hardware wrapper.

6.3) Import the projects by clicking Finish. You can ignore the warnings that may pop up.

7.1) Click Xilinx Tools→Program FPGA and click Program. Xilinx SDK will then program the FPGA with a microblaze bit file.

8.1) Right click on the demo folder and click Run as→Launch on Hardware(GDB). The microblaze program will be programmed onto your Genesys2.

This portion will help you run the demo and observe all its features.

9.1) Enumeration

The enumeration process will start without any user interaction other than launching the project on hardware.

9.2) Using the buttons

Pushbuttons BTNU, BTNL, BTND, BTNR will control the mouse pointer on the host PC.

9.3) Setting up UART communications

Plug a micro-USB cable into the plug labeled UART, and plug this into your computer.

You can use any serial terminal (Tera Term) to connect to the Genesys2 using 112500 baud rate, 8 data bits, no parity bit and 1 stop bit. This interface can be used in case status and debug functionalities are added.