Added fft.h and fft.c files -- started writing some code
Worked on audio input pathway.
Beginning to test fft functionality.
Still testing fft. Caught some bugs. Appears to work for N<32
Added audio.h and audio.c files, wrote DMA and ADC init functions
Added some audio pipeline code and the DMA interrupt
FFT tested and confirmed working. Implemented IFFT.
Began testing audio and DMA stream -- not working yet.
Appears to be Vref issue on ADC minus input.
Real-valued FFT rfft() is working. Baby steps.
Added debug pin functionality, and main.h universal include file
Minor