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Altera_Forum's avatar
Altera_Forum
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12 years ago

generate music box; two or more push buttons as inputs

Hello! Could you help me in my project? My project is a music generator using DE1 module. similar to this music box http://www.fpga4fun.com/musicbox3.html. When I pushed KEY0 push button, it will pla...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

The fpga4fun design uses a pwm signal to generate the tones. Each tone has frequency ( or period ) and a duration. You may write 2 roms, one for the period of each tone and the other for the lenght ( in pwm periods ) of the note. You read at same time both tables and get the all the information need to play this note. When finishes you increment a register and read the next value on table until end.