# Changelog

## v1.3.0 - 2022-02-21

* Updates
  * Add `transfer!/2`. This function is the raising version of `transfer/2`.
    Thanks to @mnishiguchi for this.

## v1.2.0 - 2022-01-23

* Updates
  * Add the `:lsb_first` option to support SPI transfers that send the least
    significant bit first rather than the most significant one. If the bit
    reversal isn't supported by the hardware, a software version is used.
  * Add `config/1` to return the configuration for an SPI bus reference. This is
    useful for checking what is actually being used.
  * Update `transfer/2` to support `iodata`. This makes the interface more
    convenient since now you can prepend SPI message headers in your code
    without having to concatenate binaries.
  * Support full pathes being passed to SPI devices in `open/2`. Previously this
    resulted in errors, but it was easy to forget.

## v1.1.0 - 2021-12-28

* Updates
  * Add `max_transfer_size/0` to return the low level maximum size that can be
    sent at a time. Thanks to @cocoa-xu for this.

* Bug fixes
  * Properly mark NIF transfer function as IO bound so that the Erlang scheduler
    schedules it properly.

## v1.0.0 - 2021-10-20

This release only changes the version number. No code has changed.

## v0.1.6

This release only has doc and build output cleanup. No code has changed.

## v0.1.5

* Bug fixes
  * Add -fPIC to compilation flags to fix build with `nerves_system_x86_64` and
    other environments using the Musl C toolchains

## v0.1.4

This release doesn't functionally change any code. The only updates are to build
files for consistency with other Circuits projects.

## v0.1.3

* Bug fixes
  * Fix binary handling in NIF. This fixes segfaults and other errors on
    Raspbian.

## v0.1.2

* Bug fixes
  * Fix file handle leak when SPI bus references were garbage collected.

## v0.1.1

* Bug fixes
  * Build C source under the `_build` directory so that changing targets
    properly rebuilds the C code as well as the Elixir code.

## v0.1.0

Initial release to hex.