This is a simple Spectrum Analyzer project that will playback mp3 and draw the spectrum on a Graphics LCD display using Java. This also showcase the capabilites of the GLCD Simulator and UCGDisplay libraries. Audio samples are processed and analyzed with FFT algorithm using minim library.

1. Clone

git clone https://github.com/ribasco/rpi-spectrum.git

2. Compile

mvn clean compile

• Maven 3.x
• GLCD Simulator (Download from https://github.com/ribasco/glcd-emulator/releases)

Pass the -simulation argument to activate simulation mode. Pass the -ip argument to specify the host ip Pass the -port argument to specify the host port

mvn exec:java -Dexec.args="-simulation -ip <host ip address>"

This project use the ST7920 display controller in Hardware SPI mode setting. If you have a different display or you need to change the bus interface settings etc, you can easily change this by modifying the code section createDriver(GlcdConfig config) under SpectrumAnalyzer.java class.

• Maven 3.x
• Graphics LCD (e.g. ST7920)
• Single Board Computer device with Linux kernel 4.8x above (e.g. Raspberry Pi 3)

mvn exec:java