Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

Added the ability to specify the HSPI or VSPI ESP32 hardware interfaces when initializing the SPI Bus.
Added support for the spi:close/1 function.
Added AVM_VERBOSE_ABORT CMake define, which when set to on, will print the C module and line number when a VM abort occurs. This define is off by default.
Added spi:write/3 and spi:write_read/3 functions to support generalized SPI transactions and arbitrary-length reads and writes from SPI devices.
Added support for building ESP32 port with all currently supported versions of Espressif ESP-IDF, version 4.1.x through 4.4.x.
Added support for controlling_process/2 in gen_udp and gen_tcp modules.
Added ability to get the atomvm version via erlang:system_info.
Added erlang:is_boolean/1 Bif.
Added support for esp:partition_erase_range/2
Added support for i2c:close/1
Added support for erlang:unregister/1
Added Elixir ESP32 LEDC driver and example
Added support for uart:close/1
Added Bitwise support for Elixir
Added support for esp32-s2, esp32-s3, and esp32-c3 chips.

IMPORTANT: These changes are incompatible with previous releases of AtomVM.

Changed the configuration model of the SPI driver, in order to allow for multiple "follower" devices to be attached to the same SPI Bus.
Changed the return value from erlang:system_info(esp32_chip_info) from a tuple to a map, with additional information.

New function for atom comparison, useful when writing 3rd party components.
New function for translating an atom term to an int value, according to a given translation table. This function can be used for translating an atom term to an enum const before doing a switch.
New no-op ATOM_STR(...) macro for avoiding issues with clang-format.
[ESP32] REGISTER_PORT_DRIVER for registering additional port drivers without editing any source file. This allows adding new components by just copying them to the components directory.
[ESP32] REGISTER_NIF_COLLECTION for registering additional NIFs sets without editing any source file. This allows adding new NIFs by just copying them to the components directory.
New function for getting a map or proplist value using an atom string without poluting the atom table.

Fix gen_statem: Cancel outstanding timers during state transitions in order to prevent spurious timeout messages from being sent to gen_statem process.
Fix missing Elixir libraries: examvlib was not packed into atomvmlib.avm
Fix bs_context_to_binary: match offset wasn't used, leading in certain situations to infinite loops while matching binaries.
Fix how start option was handled from bs_restore2 instruction: last saved match offset was used instead of match starting offset, causing some bytes being skipped.
Fix another potential bug when doing pattern matching using code compiled with OTP 21.
[ESP32] [UART]: Allow using different pins for rx, tx, cts and rts.
[ESP32] [UART]: Replace custom UART handling with esp-idf UART event queues, hence other UARTs than UART0 are supported, with better performances and stability.
Fix binaries concat (bs_append instruction) that was adding some extra zeroes at the end of built binaries.
Fixed a bug in gen_tcp that prevents an accepting socket from inheriting settings on the listening socket.
Fixed a bug in packing and unpacking integers into and from binaries when the bit length is not a multiple of 8.
Fixed esp:deep_sleep/1 that did not accept values above 31 minutes.
Fixed a bug that could cause processes to hang indefinitely when calling ports that have terminated.
Fixed potential VM crash when parsing external terms.
Fixed the enforcement of min_free_space process option.