Commit Graph

3 Commits

Author SHA1 Message Date
Scott Shawcroft e580d22f4a Use the external crystal on SAMD21 again.
Also, re-enable calibration storage for CircuitPlayground Express.
Tested with a 500hz PWMOut on Metro M0 with Saleae:
 * with crystal 500hz
 * with usb 500hz +- 0.1hz
 * without either 487hz += 0.1hz

SAMD51 is skipped due to DFLL errata and the fact it defaults to a
factory calibrated 48mhz that works fine for USB.

Fixes #648
2018-06-01 18:01:42 -07:00
Scott Shawcroft d0fb6e7a2f atmel-samd: Add rotary encoder support.
Fixes #283
2018-06-01 15:08:48 -07:00
Scott Shawcroft fd71e56891 atmel-samd: Re-org helper peripheral files into their own subdirectory.
Ideally in the future they won't depend on ASF4 or MicroPython.
2018-06-01 15:07:31 -07:00