atsamd-hal-0.20.0

Added

• [breaking] Add async support for many peripherals (#635):
  • Supported peripherals: SPI, I2C, UART, DMAC, Timer/counter, external interrupts (EIC)
  • Additional reading

Changed

• (eic) [breaking] Overhaul the eic API (#635, 792):
  • API now uses a typestate pattern for ExtInt struct instead of individual ExtInt1, ExtInt2, ...
  • ExtInt methods no longer require a reference to the underlying Eic
  • ExtInts take ownership of an EXTINT channel, preventing erroneous reuse
  • Additional reading

Fixed

• (i2c) Send repeated starts in byte-by-byte I2C transactions