webstersprodigy.net

A musical “note” is a waveform that has a certain fundamental frequency. A perfect sine wave consists only of the fundamental frequency, and sounds very “pure” or mellow, like a flute. For this project, you are to use interrupts to generate the notes of a musical scale, while at the same time using another interrupt to update a count. We will generate square waves by toggling a bit within a port on and off. Specifically, your program should play the notes from middle C to the next higher C, each of approximately one second in duration. These notes should be playing at the same time that an 8-bit binary count is being displayed in the LED’s, updating at approximately 1/4 second.

Does my title sound like buz-word central? You bet it does. That’s because it was a bit difficult to find any good introductory material on this. Maybe that’s because there’s so much information out there…