jepler 61698eb5d8 AnalogOut / AudioOut: Copy settings from Arduino
Make changes in asf4_conf even though I think in these cases the
"peripherals" submodule is running the show.

Arduino clocks the DAC at 12MHz but uses the CCTRL setting for
clocking < 1.2MHz (100kSPS).

A fresh clock (6) is allocated for the new 12MHz clock.  This matches
the Arduino value, though not the GCLK index.

Modify other settings to more closely resemble Arduino.

In AudioOut, actually clock the waveform data from the timer we set up
for this purpose.

This gives good waveforms when setting AnalogOut full-scale in a loop,
but the rise/fall of waveforms that come from AudioOut are still erratic.
Weirdly, if AudioOut limits its range even slightly (e.g., to 1000..64000)
then the erratic

Note that this will require
to be accepted for the submodule update here to work.
2019-09-15 11:30:49 -05:00
samd21 Clock the SAMD21 much faster so it can actually convert at its max 2018-09-18 15:29:46 -07:00
samd51 AnalogOut / AudioOut: Copy settings from Arduino 2019-09-15 11:30:49 -05:00