Release 0.10.0

This release adds support for blocking select, switches to LLVM 9, improves CGo support, improves support for the ATSAMD51 ("M4") chip, and generally has a lot of improvements and bug fixes throughout. It also adds support for a number of new boards: the Adafruit Feather M4, the Adafruit Metro M4 Express AirLift, the PineTime dev kit, and the "X9 Pro" smartwatch.

• command line
  • halt GDB after flashing with gdb subcommand
  • fix a crash when using -ocd-output
  • add info subcommand
  • add -programmer flag
• builder
  • macos: use llvm@8 instead of just llvm in paths
  • add linkerscript key to target JSON files
  • write a symbol table when writing out the compiler-rt lib
  • make Clang header detection more robust
  • switch to LLVM 9
• compiler
  • fix interface miscompilation with reflect
  • fix miscompile of static goroutine calls to closures
  • fix todo: store panic
  • fix incorrect starting value for optimized allocations in a loop
  • optimize coroutines on non-Cortex-M targets
  • fix crash for programs which have heap allocations but never hit the GC
  • add support for async interface calls
  • fix inserting non-const values in a const global
  • interp: improve error reporting
  • interp: implement comparing ptrtoint to 0
• cgo
  • improve diagnostics
  • implement the constant parser (for #define) as a real parser
  • rename reserved field names such as type
  • avoid "unsafe" imported but not used error
  • include all enums in the CGo Go AST
  • add support for nested structs and unions
  • implement #cgo CFLAGS
• standard library
  • reflect: add implementation of array alignment
  • runtime: improve scheduler performance when no goroutines are queued
  • runtime: add blocking select
  • runtime: implement interface equality in non-trivial cases
  • runtime: add AdjustTimeOffset to update current time
  • runtime: only implement CountString for required platforms
  • runtime: use MSP/PSP registers for scheduling on Cortex-M
• targets
  • arm: add system timer registers
  • atmega: add port C GPIO support
  • atsamd21: correct handling of pins >= 32
  • atsamd21: i2s initialization fixes
  • atsamd51: fix clock init code
  • atsamd51: correct initialization for RTC
  • atsamd51: fix pin function selection
  • atsamd51: pin method cleanup
  • atsamd51: allow setting pin mode for each of the SPI pins
  • atsamd51: correct channel init and pin map for ADC based on ItsyBitsy-M4
  • feather-m4: add Adafruit Feather M4 board
  • hifive1b: add support for SPI1
  • hifive1b: fix compiling in simulation
  • linux: fix time on arm32
  • metro-m4: add support for Adafruit Metro M4 Express Airlift board
  • metro-m4: fixes for UART2
  • pinetime-devkit0: add support for the PineTime dev kit
  • x9pro: add support for this smartwatch
  • pca10040-s132v6: add support for SoftDevice
  • pca10056-s140v7: add support for SoftDevice
  • arduino-nano33: added SPI1 connected to NINA-W102 chip on Arduino Nano 33 IO

Release 0.9.0

This release adds experimental support for Windows, updates to support Go 1.13, improves flashing experience of many boards (no more button pressing), and adds support for buffered channels. There are also lots of other smaller changes, see the list below.

0.9.0

• command line
  • implement 1200-baud UART bootloader reset when flashing boards that support it
  • flash using mass-storage device for boards that support it
  • implement tinygo env
  • add support for Windows (but not yet producing Windows binaries)
  • add Go version to tinygo env
  • update SVD files for up-to-date peripheral interfaces
• compiler
  • add //go:align pragma
  • fix bug related to type aliases
  • add support for buffered channels
  • remove incorrect reflect optimization
  • implement copying slices in init interpretation
  • add support for constant indices with a named type
  • add support for recursive types like linked lists
  • fix miscompile of function nil panics
  • fix bug related to goroutines
• standard library
  • machine: do not check for nil slices in SPI.Tx
  • reflectlite: add support for Go 1.13
  • runtime: implement internal/bytealg.CountString
  • sync: properly handle nil New func in sync.Pool
• targets
  • arduino: fix .bss section initialization
  • fe310: implement Pin.Get
  • gameboy-advance: support directly outputting .gba files
  • samd: reduce code size by avoiding reflection
  • samd21: do not hardcode pin numbers for peripherals
  • stm32f103: avoid issue with time.Sleep less than 200µs

Release 0.8.0

This release improves reflect support, extends and improves the scheduler, and has a whole list of improvements to microcontroller boards. In particular, it adds supports for the ItsyBitsy M4, the NUCLEO-F103RB, and even adds some preliminary support for the GameBoy Advance.

• command line
  • fix parsing of beta Go versions
  • check the major/minor installed version of Go before compiling
  • validate -target flag better to not panic on an invalid target
• compiler
  • implement full slice expression: s[:2:4]
  • fix a crash when storing a linked list in an interface
  • fix comparing struct types by making type IDs more unique
  • fix some bugs in IR generation
  • add support for linked lists in reflect data
  • implement []rune to string conversion
  • implement support for go on func values
• standard library
  • reflect: add support for named types
  • reflect: add support for t.Bits()
  • reflect: add basic support for t.AssignableTo()
  • reflect: implement t.Align()
  • reflect: add support for struct types
  • reflect: fix bug in v.IsNil and v.Pointer for addressable values
  • reflect: implement support for array types
  • reflect: implement t.Comparable()
  • runtime: implement stack-based scheduler
  • runtime: fix bug in the sleep queue of the scheduler
  • runtime: implement memcpy for Cortex-M
  • testing: implement stub testing.B struct
  • testing: add common test logging methods such as Errorf/Fatalf/Printf
• targets
  • 386: add support for linux/386 syscalls
  • atsamd21: make SPI pins configurable so that multiple SPI ports can be
    used
  • atsamd21: correct issue with invalid first reading coming from ADC
  • atsamd21: add support for reset-to-bootloader using 1200baud over USB-CDC
  • atsamd21: make pin selection more flexible for peripherals
  • atsamd21: fix minimum delay in time.Sleep
  • atsamd51: fix minimum delay in time.Sleep
  • nrf: improve SPI write-only speed, by making use of double buffering
  • stm32f103: fix SPI frequency selection
  • stm32f103: add machine.Pin.Get method for reading GPIO values
  • stm32f103: allow board specific UART usage
  • nucleo-f103rb: add support for NUCLEO-F103RB board
  • itsybitsy-m4: add support for this board with a SAMD51 family chip
  • cortex-m: add support for arm.SystemReset()
  • gameboy-advance: add initial support for the GameBoy Advance
  • wasm: add //go:wasm-module magic comment to set the wasm module name
  • wasm: add syscall/js.valueSetIndex support
  • wasm: add syscall/js.valueInvoke support

Release 0.7.1

This is a small bugfix release that fixes a problem on macOS, discovered while preparing for the hardware hack day on GopherCon.

• targets
  • atsamd21: add support for the -port flag in the flash subcommand

Release 0.7.0

Version 0.7.0 has many smaller improvements that you can see below. Some of the highlights include initial support for tinygo test, support for garbage collection in most targets including WebAssembly, and the addition of the HiFive1 rev B board, which is based on the new RISC-V architecture.

0.7.0

• command line
  • try more locations to find Clang built-in headers
  • add support for tinygo test
  • build current directory if no package is specified
  • support custom .json target spec with -target flag
  • use zversion.go to detect version of GOROOT version
  • make initial heap size configurable for some targets (currently WebAssembly
    only)
• cgo
  • add support for bitfields using generated getters and setters
  • add support for anonymous structs
• compiler
  • show an error instead of panicking on duplicate function definitions
  • allow packages like github.com/tinygo-org/tinygo/src/* by aliasing it
  • remove //go:volatile support
    It has been replaced with the runtime/volatile package.
  • allow poiners in map keys
  • support non-constant syscall numbers
  • implement non-blocking selects
  • add support for the -tags flag
  • add support for string to []rune conversion
  • implement a portable conservative garbage collector (with support for wasm)
  • add the //go:noinline pragma
• standard library
  • os: add os.Exit and syscall.Exit
  • os: add several stubs
  • runtime: fix heap corruption in conservative GC
  • runtime: add support for math intrinsics where supported, massively
    speeding up some benchmarks
  • testing: add basic support for testing
• targets
  • add support for a generic target that calls __tinygo_* functions for
    peripheral access
  • arduino-nano33: add support for this board
  • hifive1: add support for this RISC-V board
  • reelboard: add e-paper pins
  • reelboard: add PowerSupplyActive to enable voltage for on-board devices
  • wasm: put the stack at the start of linear memory, to detect stack
    overflows

Release 0.6.0

Version 0.6.0 again has many improvements. Big changes are much better CGo support, support for js.FuncOf (Go 1.12+), and support for two new boards: the Adafruit Feather M0 and the Adafruit Trinket M0. Other than that, there were lots of smaller improvements and bug fixes.

0.6.0

• command line
  • some portability improvements
  • make $GOROOT more robust and configurable
  • check for Clang at the Homebrew install location as fallback
• compiler driver
  • support multiple variations of LLVM commands, for non-Debian distributions
• compiler
  • improve code quality in multiple ways
  • make panic configurable, adding trap on panic
  • refactor many internal parts of the compiler
  • print all errors encountered during compilation
  • implement calling function values of a named type
  • implement returning values from blocking functions
  • allow larger-than-int values to be sent across a channel
  • implement complex arithmetic
  • improve hashmap support
  • add debuginfo for function arguments
  • insert nil checks on stores (increasing code size)
  • implement volatile operations as compiler builtins
  • add //go:inline pragma
  • add build tags for the Go stdlib version
• cgo
  • implement char, enum and void* types
  • support #include for builtin headers
  • improve typedef/struct/enum support
  • only include symbols that are necessary, for broader support
  • mark external function args as nocapture
  • implement support for some #define constants
  • implement support for multiple CGo files in a single package

• standard library
  • machine: remove microbit matrix (moved to drivers repository)
  • machine: refactor pins to use Pin type instead of GPIO
  • runtime: print more interface types on panic, including error

• targets
  • arm: print an error on HardFault (including stack overflows)
  • atsamd21: fix a bug in the ADC peripheral
  • atsamd21: add support for I2S
  • feather-m0: add support for this board
  • nrf51: fix a bug in I2C
  • stm32f103xx: fix a bug in I2C
  • syscall: implement Exit on unix
  • trinket-m0: add support for this board
  • wasm: make main example smaller
  • wasm: don't cache wasm file in the server, for ease of debugging
  • wasm: work around bug #41508 that caused a deadlock while linking
  • wasm: add support for js.FuncOf

Release 0.5.0

Version 0.5.0 has many big and small improvements. The headline changes include support for the Go standard library 1.12 in addition to the existing Go 1.11 support and a switch to LLVM 8 which improves WebAssembly support. Other notable changes are support for the stm32f4discovery and dropping the dependency on the GNU toolchain for ARM microcontrollers.

• compiler driver
  • use wasm-ld instead of wasm-ld-8 on macOS
  • drop dependency on llvm-ar
  • fix linker script includes when running outside TINYGOROOT
• compiler
  • switch to LLVM 8
  • add support for the Go 1.12 standard library (Go 1.11 is still supported)
  • work around lack of escape analysis due to nil checks
  • implement casting named structs and pointers to them
  • fix int casting to use the source signedness
  • fix some bugs around make([]T, …) with uncommon index types
  • some other optimizations
  • support interface asserts in interp for "math/rand" support
  • resolve all func value targets at compile time (wasm-only at the moment)
• cgo
  • improve diagnostics
  • implement C struct, union, and arrays
  • fix CGo-related crash in libclang
  • implement C.struct_ types
• targets
  • all baremetal: pretend to be linux/arm instead of js/wasm
  • avr: improve uintptr support
  • cortexm: implement memmove intrinsic generated by LLVM
  • cortexm: use the lld linker instead of arm-none-eabi-ld
  • darwin: use custom syscall package that links to libSystem.dylib
  • microbit: add blink example
  • samd21: support I2C1
  • samd21: machine/atsamd21: correct pad/pin handling when using both UART
    and USBCDC interfaces at same time
  • stm32f4discovery: add support for this board
  • wasm: support async func values
  • wasm: improve documentation and add extra example

Release 0.4.1

Version 0.4.1 fixes two important bugs in the compiler. One causes the .data section to not get flashed to the chip in many cases, and the other fixes a problem in the Docker container.

• compiler
  • fix objcopy replacement to include the .data section in the firmware image
  • use llvm-ar-7 on Linux to fix the Docker image

Release 0.4.0

Version 0.4.0 has improved support for samd21-based boards and has various compiler improvements.

It currently still requires Go 1.11, support for Go 1.12 will be added in a future release.

• compiler
  • switch to the hardfloat ABI on ARM, which is more widely used
  • avoid a dependency on objcopy (arm-none-eabi-objcopy etc.)
  • fix a bug in make([]T, n) where n is 64-bits on a 32-bit platform
  • adapt to a change in the AVR backend in LLVM 8
  • directly support the .uf2 firmware format as used on Adafruit boards
  • fix a bug when calling panic() at init time outside of the main package
  • implement nil checks, which results in a ~5% increase in code size
  • inline slice bounds checking, which results in a ~1% decrease in code size
• targets
  • samd21: fix a bug in port B pins
  • samd21: implement SPI peripheral
  • samd21: implement ADC peripheral
  • stm32: fix a bug in timekeeping
  • wasm: fix a bug in wasm_exec.js that caused corruption in linear memory when running on Node.js.

Release 0.3.0

Version 0.3.0 has added support for macOS and has greatly improved support for samd21-based boards.
It currently still depends on Go 1.11, support for Go 1.12 will be added in a future release.

• compiler
  • remove old -initinterp flag
  • add support for macOS
• cgo
  • add support for bool/float/complex types
• standard library
  • device/arm: add support to disable/enable hardware interrupts
  • machine: add CPU frequency for nrf-based boards
  • syscall: add support for darwin/amd64
• targets
  • circuitplay_express: add support for this board
  • microbit: add regular pin constants
  • samd21: fix time function for goroutine support
  • samd21: add support for USB-CDC (serial over USB)
  • samd21: add support for pins in port B
  • samd21: add support for pullup and pulldown pins
  • wasm: add support for Safari in example