If we fill and use xmit_buffer on the same cycle record it as full.
Rename sampler to bandpass.
Implement baseline wander correction in the sampler.
Rename raw to sampler.
Rationalise usb_slurp setup.
Improve the image filtering.
Support the baseline wander correction.
Correct power calculation.
Increase drive strength on the clock to ADC.  Possibly reduces jitter.
Have a larger peroid on the USB strobes going into the usbio.
(10ns v. 4ns).  Put an extra cycle on the read to match.
Sanitize the bit assignments on the spi flash port register.
A less cracky data return.