v2.1.0

• New features

  • Support setting a timeout on I2C bus transactions. Support for this depends
    on the backend and drivers, but it's at least possible to set it. The
    default is usually 1 second with Linux.

• Improvements

  • Various documentation and spec cleanup

v2.0.7

• Improvements
  • Raise earlier when bad values are passed for the :retries option
  • Update copyrights and license info for REUSE compliance

v2.0.6

• Bug fixes
  • Don't crash on ENXIO (errno 6) failures due to unresponsives I2C targets
  • Add ENXIO as a known error for easier debugging next time

v2.0.5

Only Elixir 1.13 and later are supported now. There are no known issues with
using earlier versions at the moment, but it's no longer regularly checked in
CI.

• Bug fixes
  • Fix compilation when Erlang has been installed to a directory with spaces

v2.0.4

• Improvements
  • Improve target detection so that setting MIX_TARGET when not
    crosscompiling does the expected thing on MacOS.

v2.0.3

• Bug fixes
  • Remove lazy NIF loading. There's an unexplained segfault in a small example
    program that uses the same strategy. Even though it wasn't reproduceable
    here, it's not worth the risk. Thanks to @pojiro for investigating.

v2.0.2

• Changes
  • Fix race condition when multiple processes load the NIF simultaneously that
    would cause an unnecessary crash.
  • Bump minimum supported version of Elixir to 1.11 since no longer testing
    with it due to a dependency issue.

v2.0.1

• Changes
  • Add Circuits.I2C.bus() type back to fix a dialyzer warning on projects
    that support both Circuits.I2C 1.0 and 2.0.

v2.0.0

This is a major update to Circuits.I2C that removes the requirement to use
Nerves or Linux. The API is almost the same and the default is to compile and
use the Linux backend, so changes may not be needed.

• Changes
  • Support alternative backends for different operating systems or for
    simulated hardware
  • For the Linux NIF, support passing a :retry count to Circuits.I2C.open/2
    that will apply to all I2C operations. This simplifies dealing with devices
    with flaky connections.
  • Defer loading the Linux NIF until Circuits.I2C.open/2 is called
  • Return error on Circuits.I2C.open/2 if the device isn't a real I2C device.
    This was previously detected on the first operation.
  • For the Linux NIF, return errno numbers rather than their strerr strings
    when they're unknown. It turned out that the strings could be more confusing
    that the numbers.

v2.0.0-pre.0

This is a major update to Circuits.I2C that removes the requirement to use
Nerves or Linux. The API is almost the same and the default is to compile and
use the Linux backend, so changes may not be needed.

This is a prerelease so APIs may still change before the v2.0.0 release.

• Changes
  • Support alternative backends for different operating systems or for
    simulated hardware
  • For the Linux NIF, support passing a :retry count to Circuits.I2C.open/2
    that will apply to all I2C operations. This simplifies dealing with devices
    with flaky connections.
  • Defer loading the Linux NIF until Circuits.I2C.open/2 is called
  • Return error on Circuits.I2C.open/2 if the device isn't a real I2C device.
    This was previously detected on the first operation.
  • For the Linux NIF, return errno numbers rather than their strerr strings
    when they're unknown. It turned out that the strings could be more confusing
    that the numbers.