Genesys 2 DMA Audio Demo
|8 User Switches||X|
|8 User LEDs||X|
|6 User Push Buttons||X|
|128×32 Monochrome OLED Display||X|
|Fully Bonded 400-pin FMC HPC Connector||X|
|Micro SD Card Connector||X|
|HDMI Sink and HDMI Source||X|
|Two four-lane DisplayPort Connectors||X|
|Audio Codec w/ Four 3.5mm Jacks||X|
|10/100/1000 Ethernet PHY||X|
|1GiB 1800Mt/s DDR3 Memory||X|
|Five Pmod Ports||X|
|Pmod for XADC Signals||X|
|USB HID Host||X|
|USB 2.0 Host/Device/OTG PHY||X|
The audio demo records a 5 second sample from microphone(J12) or line in (J13) and plays it back on headphone out(J10) or line out (J12). Record and playback is started by push buttons:
|BTNL||play on Line out|
|BTNR||record from line in|
|BTNU||record from microphone|
|BTND||playback on headphone|
For example, with the push of BTNU this demo records 5 seconds of audio data from the MIC (J12) input. Consequently by pressing BTND the demo plays on the HPH OUT (J10) the recorded samples.
- Basic familiarity with Vivado
- This experience can be found by walking through our “Getting Started with Vivado” guide
- Genesys 2 FPGA board
- Micro-USB cable
- Genesys 2 Power Supply
- Headphones or Speakers
- Audio Input device (Aux-In, Guitar, etc.)
- Vivado Design Suite 2016.X
- Newer/older versions can be used, but the procedure may vary slightly
Plug in your microphone or aux input into the respective jack on your Genesys 2. Plug your speakers/headphones into the Line out jack. Plug in your Genesys 2 and power it on.
1. Download the Project
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.
2. Generate the Project
2.1) If not already installed, install the Vivado Board Files for the Genesys 2 by following this guide: Installing Vivado Board Files for Digilent Boards.
2.2) Generate the user_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 2015.3
3. Build the Project
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. Export to SDK
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. Open Xilinx SDK and create a workspace
6. Import the SDK files
7. Program the FPGA
8. Program the Microblaze processor
Running the Genesys 2 DMA Audio Demo
This portion will help you run the demo and observe all its features.
1. Recording from an input
To record from the microphone input, press btnu. To record from the line input, press btnr. Once the recording is activated, the message “Start Recording…” will be sent over UART and the demo will record 5 seconds of audio. If any buttons are pressed during the recording, the message “Still Recording…” will be sent over UART.
2. Playing to an output
To play to the microphone input, press btnd. To play to the line output, press btnl. Once the playback is activated, the message “Start Playback…” will be sent over UART and the demo will play 5 seconds of audio. If any buttons are pressed during the playback, the message “Still Playing…” will be sent over UART.