1. I can only generate the max frequency of the sine wave at 200Hz, there's no sine wave output if I use frequency larger than 200. How can I generate higher frequency?
You need to use a sine wave with less samples per period to get higher frequencies.
2. Does the DMA.setupTransfer command set up transfer once? How does TimerExclusive control repeating DMA transfer?
It sets up the DMA with the specifications/parameters. Timer keeps running until you tell it to stop. Please see the MSP430 User's Guide, these questions and more are answered by this document.
3. Is there any audio file example other than this sine wave that I can use to generate better audio output, like midi file?
No, no such component exists. -Joe _______________________________________________ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
