After getting a great deal of good advice from the group, here's my
A simple example of how to use the LPC2138 to create a sine wave
using direct digital synthesis (DDS).
It was developed for the Keil LPC2138 board and compiler and puts out
an audio tone from the DAC using the amplifier on the board. It
should work for other boards as well.
It's amazingly simple to create very nice looking sine waves using
DDS on the LPC2138. The waves can easily be frequency modulated or
amplitude modulated, and you can create musical chords by combining
multiple sine waves.
I included a couple technical documents that explain the process in
detail--as a result there are relatively few comments in the source
Re: Sinewave Direct Digital Synthesis Example Posted