Altera Cyclone II FPGA Starter User Manual download pdf (Page 44)

6–2 Altera Corporation

Cyclone II FPGA Starter Development Kit User Guide October 2006

Music Synthesizer Demonstration

5. Place toggle switch SW9 in the UP position to hear a 1 kHz

humming sound from the audio-out port. Alternatively, if switch

SW9 is DOWN, connect the Mic In port to a microphone to hear

voice sounds or use the line-in port to play audio from an

appropriate sound source.

The CII_Starter_Default folder contains the Verilog source code for this

demonstration. It also includes the necessary files for the corresponding

Quartus II project. The top-level CII_Starter_Default.v Ver il og fi le can

serve as a template for other projects, because it defines ports that

correspond to all of the user-accessible pins on the Cyclone II FPGA.

Music

Synthesizer

Demonstration

This demonstration shows how to implement a multi-tone electronic

keyboard using the development board with a PS/2 keyboard and a

speaker. Figure 6–1 shows the setup of the demonstration.

Use the PS/2 keyboard as the piano keyboard for input. The Cyclone II

FPGA on the development board serves as the Music Synthesizer System

on Chip (SOC) to generate music and tones. The VGA monitor connected

to the development board shows which key is pressed during the playing

of the music.

Figure 6–1. Music Synthesizer Demonstration Setup

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Altera Cyclone II FPGA Starter User Manual Page 44