I spoke to PCR over the phone today and told him that we were unable to get even a simple sawtooth waveform out of the DAC. Niranjay told me that the port details in the manual given by Vi Microsystems was wrong. PCR has now said that he’ll enquire at Vi and tell us by Tuesday when he comes.
I have started work on the implementation of the adaptive sinusoidal interference canceller (ASIC) in ADSP-2181. The major difficulty in the implementation is the determination of cosine & sine values as 2181 is a fixed point processor and doesn’t have native support for the core math functions. If I implement it in C and cross-compile it, the method will work, but will be very slow. The other difficulty is debugging the program, which is almost as bad, if not worse than debugging C programs in Linux. But I think we can finish it by the end of the month. That will complete the project work, leaving only the documentation.