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TinyGo v0.13.0 Release Notes

Release Date: 2020-04-14 // about 4 years ago

  • 🚀 This new release adds support for Go 1.14 and LLVM 10. It fixes a number of compiler and runtime bugs and also has had some significant refactoring in goroutine support. Perhaps most visible is that USB-CDC now works on all major OSes (Windows, macOS, and Linux) so that you can flash Adafruit boards without manually entering the bootloader.

    🚀 This release adds support for five new boards: the Adafruit CLUE, Arduino Mega 2560, and the Particle Argon, Boron and Xenon.

    🚀 Note that this release requires Go 1.14 to support WebAssembly.

    🏗 ARM builds (for the Raspberry Pi) will follow later.

    🚀 Here is a detailed list of changes with this release:

    • 💻 command line
      • use gdb-multiarch for debugging Cortex-M chips
      • support tinygo run with simavr
      • support LLVM 10
      • support Go 1.14
      • retry 3 times when attempting to do a 1200-baud reset
    • compiler
      • mark the abort function as noreturn
      • fix deferred calls to exported functions
      • add debug info for local variables
      • check for channel size limit
      • refactor coroutine lowering
      • add dereferenceable_or_null attribute to pointer parameters
      • do not perform nil checking when indexing slices and on unsafe.Pointer
      • remove runtime.isnil hack
      • use LLVM builtins for runtime memcpy/memmove/memzero functions
      • implement spec-compliant shifts on negative/overflow
      • support anonymous type asserts
      • track pointer result of string concatenation for GC
      • track PHI nodes for GC
      • add debug info to goroutine start wrappers
      • optimize comparing interface values against nil
      • fix miscompilation when deferring an interface call
      • builder: include picolibc for most baremetal targets
      • builder: run tools (clang, lld) as separate processes
      • builder: use -fshort-enums consistently
      • interp: add support for constant type asserts
      • interp: better support for interface operations
      • interp: include backtrace with error
      • transform: do not track const globals for GC
      • transform: replace panics with source locations
      • transform: fix error in interface lowering pass
      • transform: make coroutine lowering deterministic
      • transform: fix miscompilation in func lowering
    • cgo
      • make -I and -L paths absolute
    • standard library
      • machine: set the USB VID and PID to the manufacturer values
      • machine: correct USB CDC composite descriptors
      • machine: move errors.New calls to globals
      • runtime: support operations on nil maps
      • runtime: fix copy builtin return value on AVR
      • runtime: refactor goroutines
      • runtime: support -scheduler=none on most platforms
      • runtime: run package initialization in the main goroutine
      • runtime: export malloc / free for use from C
      • runtime: add garbage collector that uses an external allocator
      • runtime: scan callee-saved registers while marking the stack
      • runtime: remove recursion from conservative GC
      • runtime: fix blocking select on nil channel
      • runtime/volatile: include ReplaceBits method
      • sync: implement trivial sync.Map
    • targets
      • arm: use -fomit-frame-pointer
      • atmega1284: support this chip for testing purposes
      • atsamd51: make QSPI available on all boards
      • atsamd51: add support for ADC1
      • atsamd51: use new interrupt registration in UART code
      • attiny: clean up pin definitions
      • avr: use the correct RAM start address
      • avr: pass the correct -mmcu flag to the linker
      • avr: add support for tasks scheduler (disabled by default)
      • avr: fix linker problem with overlapping program/data areas
      • nrf: fix typo in pin configuration options
      • nrf: add lib/nrfx/mdk to include dirs
      • nrf52840: implement USB-CDC
      • riscv: implement VirtIO target and add RISC-V integration test
      • riscv: add I2C support for the HiFive1 rev B board
      • stm32: refactor GPIO pin handling
      • stm32: refactor UART code
      • stm32f4: add SPI
      • wasm: support Go 1.14 (breaking previous versions)
      • wasm: support syscall/js.CopyBytesToJS
      • wasm: sync polyfills from Go 1.14.
    • boards
      • arduino-mega2560: add the Arduino Mega 2560
      • clue-alpha: add the Adafruit CLUE Alpha
      • gameboy-advance: enable debugging with GDB
      • particle-argon: add the Particle Argon board
      • particle-boron: add the Particle Boron board
      • particle-xenon: add the Particle Xenon board
      • reelboard: add reelboard-s140v7 SoftDevice target