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0.23.0

  • command line
    • add -work flag
    • add Go 1.18 support
    • add LLVM 14 support
    • run: add support for command-line parameters
    • build: calculate default output path if -o is not specified
    • build: add JSON output
    • test: support multiple test binaries with -c
    • test: support flags like -v on all targets (including emulated firmware)
  • compiler
    • add support for ThinLTO
    • use compiler-rt from LLVM
    • builder: prefer GNU build ID over Go build ID for caching
    • builder: add support for cross compiling to Darwin
    • builder: support machine outlining pass in stacksize calculation
    • builder: disable asynchronous unwind tables
    • compileopts: fix emulator configuration on non-amd64 Linux architectures
    • compiler: move allocations > 256 bytes to the heap
    • compiler: fix incorrect unsafe.Alignof on some 32-bit architectures
    • compiler: accept alias for slice cap builtin
    • compiler: allow slices of empty structs
    • compiler: fix difference in aliases in interface methods
    • compiler: make RawSyscall an alias for Syscall
    • compiler: remove support for memory references in AsmFull
    • loader: only add Clang header path for CGo
    • transform: fix poison value in heap-to-stack transform
  • standard library
    • internal/fuzz: add this package as a shim
    • os: implement readdir for darwin and linux
    • os: add DirFS, which is used by many programs to access readdir.
    • os: isWine: be compatible with older versions of wine, too
    • os: implement RemoveAll
    • os: Use a uintptr for NewFile
    • os: add stubs for exec.ExitError and ProcessState.ExitCode
    • os: export correct values for DevNull for each OS
    • os: improve support for Signal by fixing various bugs
    • os: implement File.Fd method
    • os: implement UserHomeDir
    • os: add exec.ProcessState stub
    • os: implement Pipe for darwin
    • os: define stub ErrDeadlineExceeded
    • reflect: add stubs for more missing methods
    • reflect: rename reflect.Ptr to reflect.Pointer
    • reflect: add Value.FieldByIndexErr stub
    • runtime: fix various small GC bugs
    • runtime: use memzero for leaking collector instead of manually zeroing objects
    • runtime: implement memhash
    • runtime: implement fastrand
    • runtime: add stub for debug.ReadBuildInfo
    • runtime: add stub for NumCPU
    • runtime: don't inline runtime.alloc with -gc=leaking
    • runtime: add Version
    • runtime: add stubs for NumCgoCall and NumGoroutine
    • runtime: stub {Lock,Unlock}OSThread on Windows
    • runtime: be able to deal with a very small heap
    • syscall: make Environ return a copy of the environment
    • syscall: implement getpagesize and munmap
    • syscall: wasi: define MAP_SHARED and PROT_READ
    • syscall: stub mmap(), munmap(), MAP_SHARED, PROT_READ, SIGBUS, etc. on nonhosted targets
    • syscall: darwin: more complete list of signals
    • syscall: wasi: more complete list of signals
    • syscall: stub WaitStatus
    • syscall/js: allow copyBytesTo(Go|JS) to use Uint8ClampedArray
    • testing: implement TempDir
    • testing: nudge type TB closer to upstream; should be a no-op change.
    • testing: on baremetal platforms, use simpler test matcher
  • targets
    • atsamd: fix usbcdc initialization when -serial=uart
    • atsamd51: allow higher frequency when using SPI
    • esp: support CGo
    • esp32c3: add support for input pin
    • esp32c3: add support for GPIO interrupts
    • esp32c3: add support to receive UART data
    • rp2040: fix PWM bug at high frequency
    • rp2040: fix some minor I2C bugs
    • rp2040: fix incorrect inline assembly
    • rp2040: fix spurious i2c STOP during write+read transaction
    • rp2040: improve ADC support
    • wasi: remove --export-dynamic linker flag
    • wasm: remove heap allocator from wasi-libc
  • boards
    • circuitplay-bluefruit: move pin mappings so board can be compiled for WASM use in Playground
    • esp32-c3-12f: add the ESP32-C3-12f Kit
    • m5stamp-c3: add pin setting of UART
    • macropad-rp2040: add the Adafruit MacroPad RP2040 board
    • nano-33-ble: typo in LPS22HB peripheral definition and documentation (#2579)
    • teensy41: add the Teensy 4.1 board
    • teensy40: add ADC support
    • teensy40: add SPI support
    • thingplus-rp2040: add the SparkFun Thing Plus RP2040 board
    • wioterminal: add DefaultUART
    • wioterminal: verify written data when flashing through OpenOCD
    • xiao-ble: add XIAO BLE nRF52840 support

0.22.0

  • command line
    • add asyncify to scheduler flag help
    • support -run for tests
    • remove FreeBSD target support
    • add LLVM 12 and LLVM 13 support, use LLVM 13 by default
    • add support for ARM64 MacOS
    • improve help
    • check /run/media as well as /media on Linux for non-debian-based distros
    • test: set cmd.Dir even when running emulators
    • info: add JSON output using the -json flag
  • compiler
    • builder: fix off-by-one in size calculation
    • builder: handle concurrent library header rename
    • builder: use flock to avoid double-compiles
    • builder: use build ID as cache key
    • builder: add -fno-stack-protector to musl build
    • builder: update clang header search path to look in /usr/lib
    • builder: explicitly disable unwind tables for ARM
    • cgo: add support for C.CString and related functions
    • compiler: fix ranging over maps with particular map types
    • compiler: add correct debug location to init instructions
    • compiler: fix emission of large object layouts
    • compiler: work around AVR atomics bugs
    • compiler: predeclare runtime.trackPointer
    • interp: work around AVR function pointers in globals
    • interp: run goroutine starts and checks at runtime
    • interp: always run atomic and volatile loads/stores at runtime
    • interp: bump timeout to 180 seconds
    • interp: handle type assertions on nil interfaces
    • loader: elminate goroot cache inconsistency
    • loader: respect $GOROOT when running go list
    • transform: allocate the correct amount of bytes in an alloca
    • transform: remove switched func lowering
  • standard library
    • crypto/rand: show error if platform has no rng
    • device/*: add *_Msk field for each bit field and avoid duplicates
    • device/*: provide Set/Get for each register field described in the SVD files
    • internal/task: swap stack chain when switching goroutines
    • internal/task: remove -scheduler=coroutines
    • machine: add Device string constant
    • net: add bare Interface implementation
    • net: add net.Buffers
    • os: stub out support for some features
    • os: obey TMPDIR on unix, TMP on Windows, etc
    • os: implement ReadAt, Mkdir, Remove, Stat, Lstat, CreateTemp, MkdirAll, Chdir, Chmod, Clearenv, Unsetenv, Setenv, MkdirTemp, Rename, Seek, ExpandEnv, Symlink, Readlink
    • os: implement File.Stat
    • os: fix IsNotExist on nonexistent path
    • os: fix opening files on WASI in read-only mode
    • os: work around lack of syscall.seek on 386 and arm
    • reflect: make sure indirect pointers are handled correctly
    • runtime: allow comparing interfaces
    • runtime: use LLVM intrinsic to read the stack pointer
    • runtime: strengthen hashmap hash function for structs and arrays
    • runtime: fix float/complex hashing
    • runtime: fix nil map dereference
    • runtime: add realloc implementation to GCs
    • runtime: handle negative sleep times
    • runtime: correct GC scan bounds
    • runtime: remove extalloc GC
    • rumtime: implement __sync libcalls as critical sections for most microcontrollers
    • runtime: add stubs for Func.FileLine and Frame.PC
    • sync: fix concurrent read-lock on write-locked RWMutex
    • sync: add a package doc
    • sync: add tests
    • syscall: add support for Mmap and Mprotect
    • syscall: fix array size for mmap slice creation
    • syscall: enable Getwd in wasi
    • testing: add a stub for CoverMode
    • testing: support -bench option to run benchmarks matching the given pattern.
    • testing: support b.SetBytes(); implement sub-benchmarks.
    • testing: replace spaces with underscores in test/benchmark names, as upstream does
    • testing: implement testing.Cleanup
    • testing: allow filtering subbenchmarks with the -bench flag
    • testing: implement -benchtime flag
    • testing: print duration
    • testing: allow filtering of subtests using -run
  • targets
    • all: change LLVM features to match vanilla Clang
    • avr: use interrupt-based timer which is much more accurate
    • nrf: fix races in I2C
    • samd51: implement TRNG for randomness
    • stm32: pull-up on I2C lines
    • stm32: fix timeout for i2c comms
    • stm32f4, stm32f103: initial implementation for ADC
    • stm32f4, stm32f7, stm32l0x2, stm32l4, stm32l5, stm32wl: TRNG implementation in crypto/rand
    • stm32wl: add I2C support
    • windows: add support for the -size= flag
    • wasm: add support for tinygo test
    • wasi, wasm: raise default stack size to 16 KiB
  • boards
    • add M5Stack
    • add lorae5 (stm32wle) support
    • add Generic Node Sensor Edition
    • add STM32F469 Discovery
    • add M5Stamp C3
    • add Blues Wireless Swan
    • bluepill: add definitions for ADC pins
    • stm32f4disco: add definitions for ADC pins
    • stm32l552ze: use supported stlink interface
    • microbit-v2: add some pin definitions

0.21.0

  • command line
    • drop support for LLVM 10
    • build: drop support for LLVM targets in the -target flag
    • build: fix paths in error messages on Windows
    • build: add -p flag to set parallelism
    • lldb: implement tinygo lldb subcommand
    • test: use emulator exit code instead of parsing test output
    • test: pass testing arguments to wasmtime
  • compiler
    • use -opt flag for optimization level in CFlags (-Os, etc)
    • builder: improve accuracy of the -size=full flag
    • builder: hardcode some more frame sizes for _aeabi* functions
    • builder: add support for -size= flag for WebAssembly
    • cgo: fix line/column reporting in syntax error messages
    • cgo: support function definitions in CGo headers
    • cgo: implement rudimentary C array decaying
    • cgo: add support for stdio in picolibc and wasi-libc
    • cgo: run CGo parser per file, not per CGo fragment
    • compiler: fix unintentionally exported math functions
    • compiler: properly implement div and rem operations
    • compiler: add support for recursive function types
    • compiler: add support for the go keyword on interface methods
    • compiler: add minsize attribute for -Oz
    • compiler: add "target-cpu" and "target-features" attributes
    • compiler: fix indices into strings and arrays
    • compiler: fix string compare functions
    • interp: simplify some code to avoid some errors
    • interp: support recursive globals (like linked lists) in globals
    • interp: support constant globals
    • interp: fix reverting of extractvalue/insertvalue with multiple indices
    • transform: work around renamed return type after merging LLVM modules
  • standard library
    • internal/bytealg: fix indexing error in Compare()
    • machine: support Pin.Get() function when the pin is configured as output
    • net, syscall: Reduce code duplication by switching to internal/itoa.
    • os: don't try to read executable path on baremetal
    • os: implement Getwd
    • os: add File.WriteString and File.WriteAt
    • reflect: fix type.Size() to account for struct padding
    • reflect: don't construct an interface-in-interface value
    • reflect: implement Value.Elem() for interface values
    • reflect: fix Value.Index() in a specific case
    • reflect: add support for DeepEqual
    • runtime: add another set of invalid unicode runes to encodeUTF8()
    • runtime: only initialize os.runtime_args when needed
    • runtime: only use CRLF on baremetal systems for println
    • runtime/debug: stub debug.SetMaxStack
    • runtime/debug: stub debug.Stack
    • testing: add a stub for t.Parallel()
    • testing: add support for -test.short flag
    • testing: stub B.ReportAllocs()
    • testing: add testing.Verbose
    • testing: stub testing.AllocsPerRun
  • targets
    • fix gen-device-svd to handle 64-bit values
    • add CPU and Features property to all targets
    • match LLVM triple to the one Clang uses
    • atsam: simplify definition of SERCOM UART, I2C and SPI peripherals
    • atsam: move I2S0 to machine file
    • esp32: fix SPI configuration
    • esp32c3: add support for GDB debugging
    • esp32c3: add support for CPU interrupts
    • esp32c3: use tasks scheduler by default
    • fe310: increase CPU frequency from 16MHz to 320MHz
    • fe310: add support for bit banging drivers
    • linux: build static binaries using musl
    • linux: reduce binary size by calling write instead of putchar
    • linux: add support for GOARM
    • riscv: implement 32-bit atomic operations
    • riscv: align the heap to 16 bytes
    • riscv: switch to tasks-based scheduler
    • rp2040: add CPUFrequency()
    • rp2040: improve I2C baud rate configuration
    • rp2040: add pin interrupt API
    • rp2040: refactor PWM code and fix Period calculation
    • stm32f103: fix SPI
    • stm32f103: make SPI frequency selection more flexible
    • qemu: signal correct exit code to QEMU
    • wasi: run C/C++ constructors at startup
    • wasm: ensure heapptr is aligned
    • wasm: update wasi-libc dependency
    • wasm: wasi: use asyncify
    • wasm: support -scheduler=none
    • windows: add support for Windows (amd64 only for now)
  • boards
    • feather-stm32f405, feather-rp2040: add I2C pin names
    • m5stack-core2: add M5Stack Core2
    • nano-33-ble: SoftDevice s140v7 support
    • nano-33-ble: add constants for more on-board pins

0.20.0

  • command line
    • add support for Go 1.17
    • improve Go version detection
    • add support for the Black Magic Probe (BMP)
    • add a flag for creating cpu profiles
  • compiler
    • builder: list libraries at the end of the linker command
    • builder: strip debug information at link time instead of at compile time
    • builder: add missing error check for ioutil.TempFile()
    • builder: simplify running of jobs
    • compiler: move LLVM math builtin support into the compiler
    • compiler: move math aliases from the runtime to the compiler
    • compiler: add aliases for many hashing packages
    • compiler: add *ssa.MakeSlice bounds tests
    • compiler: fix max possible slice
    • compiler: add support for new language features of Go 1.17
    • compiler: fix equally named structs in different scopes
    • compiler: avoid zero-sized alloca in channel operations
    • interp: don't ignore array indices for untyped objects
    • interp: keep reverted package initializers in order
    • interp: fix bug in compiler-time/run-time package initializers
    • loader: fix panic in CGo files with syntax errors
    • transform: improve GC stack slot pass to work around a bug
  • standard library
    • crypto/rand: switch to arc4random_buf
    • math: fix math.Max and math.Min
    • math/big: fix undefined symbols error
    • net: add MAC address implementation
    • os: implement os.Executable
    • os: add SEEK_SET, SEEK_CUR, and SEEK_END
    • reflect: add StructField.IsExported method
    • runtime: reset heapptr to heapStart after preinit()
    • runtime: add subsections_via_symbols to assembly files on darwin
    • testing: add subset implementation of Benchmark
    • testing: test testing package using tinygo test
    • testing: add support for the -test.v flag
  • targets
    • 386: bump minimum requirement to the Pentium 4
    • arm: switch to Thumb instruction set on ARM
    • atsamd: fix copy-paste error for atsamd21/51 calibTrim block
    • baremetal,wasm: support command line params and environment variables
    • cortexm: fix stack overflow because of unaligned stacks
    • esp32c3: add support for the ESP32-C3 from Espressif
    • nrf52840: fix ram size
    • nxpmk66f18: fix a suspicious bitwise operation
    • rp2040: add SPI support
    • rp2040: add I2C support
    • rp2040: add PWM implementation
    • rp2040: add openocd configuration
    • stm32: add support for PortMask* functions for WS2812 support
    • unix: fix time base for time.Now()
    • unix: check for mmap error and act accordingly
    • wasm: override dlmalloc heap implementation from wasi-libc
    • wasm: align heap to 16 bytes
    • wasm: add support for the crypto/rand package
  • boards
    • add DefaultUART to adafruit boards
    • arduino-mkrwifi1010: add board definition for Arduino MKR WiFi 1010
    • arduino-mkrwifi1010: fix pin definition of NINA_RESETN
    • feather-nrf52: fix pin definition of uart
    • feather-rp2040: add pin name definition
    • gameboy-advance: fix ROM header
    • mdbt50qrx-uf2: add Raytac MDBT50Q-RX Dongle with TinyUF2
    • nano-rp2040: define NINA_SPI and fix wifinina pins
    • teensy40: enable hardware UART reconfiguration, fix receive watermark interrupt

0.19.0

  • command line
    • don't consider compile-only tests as failing
    • add -test flag for tinygo list
    • escape commands while printing them with the -x flag
    • make flash-command portable and safer to use
    • use extended-remote instead of remote in GDB
    • detect specific serial port IDs based on USB vid/pid
    • add a flag to the command line to select the serial implementation
  • compiler
    • cgo: improve constant parser
    • compiler: support chained interrupt handlers
    • compiler: add support for running a builtin in a goroutine
    • compiler: do not emit nil checks for loading closure variables
    • compiler: skip context parameter when starting regular goroutine
    • compiler: refactor method names
    • compiler: add function and global section pragmas
    • compiler: implement syscall.rawSyscallNoError in inline assembly
    • interp: ignore inline assembly in markExternal
    • interp: fix a bug in pointer cast workaround
    • loader: fix testing a main package
  • standard library
    • crypto/rand: replace this package with a TinyGo version
    • machine: make USBCDC global a pointer
    • machine: make UART objects pointer receivers
    • machine: define Serial as the default output
    • net: add initial support for net.IP
    • net: add more net compatibility
    • os: add stub for os.ReadDir
    • os: add FileMode constants from Go 1.16
    • os: add stubs required for net/http
    • os: implement process related functions
    • reflect: implement AppendSlice
    • reflect: add stubs required for net/http
    • runtime: make task.Data a 64-bit integer to avoid overflow
    • runtime: expose memory stats
    • sync: implement NewCond
    • syscall: fix int type in libc version
  • targets
    • cortexm: do not disable interrupts on abort
    • cortexm: bump default stack size to 2048 bytes
    • nrf: avoid heap allocation in waitForEvent
    • nrf: don't trigger a heap allocation in SPI.Transfer
    • nrf52840: add support for flashing with the BOSSA tool
    • rp2040: add support for GPIO input
    • rp2040: add basic support for ADC
    • rp2040: gpio and adc pin definitions
    • rp2040: implement UART
    • rp2040: patch elf to checksum 2nd stage boot
    • stm32: add PWM for most chips
    • stm32: add support for pin interrupts
    • stm32f103: add support for PinInputPullup / PinInputPulldown
    • wasi: remove wasm build tag
  • boards
    • feather-rp2040: add support for this board
    • feather-nrf52840-sense: add board definition for this board
    • pca10059: support flashing from Windows
    • nano-rp2040: add this board
    • nano-33-ble: add support for this board
    • pico: add the Raspberry Pi Pico board with the new RP2040 chip
    • qtpy: add pin for neopixels
    • all: add definition for ws2812 for supported boards

0.18.0

  • command line
    • drop support for Go 1.11 and 1.12
    • throw an error when no target is specified on Windows
    • improve error messages in getDefaultPort(), support for multiple ports
    • remove -cflags and -ldflags flags
    • implement -ldflags="-X ..."
    • add -print-allocs flag that lets you print all heap allocations
    • openocd commands in tinygo command line
    • add -llvm-features parameter
    • match go test output
    • discover USB ports only, this will ignore f.ex. bluetooth
    • use physicmal path instead of cached GOROOT in function getGoroot
    • add goroot for snap installs
  • compiler
    • builder: add support for -opt=0
    • builder, compiler: compile and cache packages in parallel
    • builder: run interp per package
    • builder: cache C and assembly file outputs
    • builder: add support for -x flag to print commands
    • builder: add optsize attribute while building the package
    • builder: run function passes per package
    • builder: hard code Clang compiler
    • compiler: do not use llvm.GlobalContext()
    • compiler: remove SimpleDCE pass
    • compiler: do not emit nil checks for *ssa.Alloc instructions
    • compiler: merge runtime.typecodeID and runtime.typeInInterface
    • compiler: do not check for impossible type asserts
    • compiler: fix use of global context: llvm.Int32Type()
    • compiler: add interface IR test
    • compiler: fix lack of method name in interface matching
    • compiler: fix "fragment covers entire variable" bug
    • compiler: optimize string literals and globals
    • compiler: decouple func lowering from interface type codes
    • compiler: add function attributes to some runtime calls
    • compiler: improve position information in error messages
    • cgo: add support for CFLAGS in .c files
    • interp: support GEP on fixed (MMIO) addresses
    • interp: handle (reflect.Type).Elem()
    • interp: add support for runtime.interfaceMethod
    • interp: make toLLVMValue return an error instead of panicking
    • interp: add support for switch statement
    • interp: fix phi instruction
    • interp: remove map support
    • interp: support extractvalue/insertvalue with multiple operands
    • transform: optimize string comparisons against ""
    • transform: optimize reflect.Type Implements() method
    • transform: fix bug in interface lowering when signatures are renamed
    • transform: don't rely on struct name of runtime.typecodeID
    • transform: use IPSCCP pass instead of the constant propagation pass
    • transform: fix func lowering assertion failure
    • transform: do not lower zero-sized alloc to alloca
    • transform: split interface and reflect lowering
  • standard library
    • runtime: add dummy debug package
    • machine: fix data shift/mask in newUSBSetup
    • machine: make machine.I2C0 and similar objects pointers
    • machine: unify usbcdc code
    • machine: refactor PWM support
    • machine: avoid heap allocations in USB code
    • reflect: let reflect.Type be of interface type
    • reflect: implement a number of stub functions
    • reflect: check for access in the Interface method call
    • reflect: fix AssignableTo and Implements methods
    • reflect: implement Value.CanAddr
    • reflect: implement Sizeof and Alignof for func values
    • reflect: implement New function
    • runtime: implement command line arguments in hosted environments
    • runtime: implement environment variables for Linux
    • runtime: improve timers on nrf, and samd chips
  • targets
    • all: use -Qunused-arguments only for assembly files
    • atmega1280: add PWM support
    • attiny: remove dummy UART
    • atsamd21: improve SPI
    • atsamd51: fix PWM support in atsamd51p20
    • atsamd5x: improve SPI
    • atsamd51, atsame5x: unify samd51 and same5x
    • atsamd51, atsamd21: fix ADC.Get() value at 8bit and 10bit
    • atsame5x: add support for CAN
    • avr: remove I2C stubs from attiny support
    • cortexm: check for arm-none-eabi-gdb and gdb-multiarch commands
    • cortexm: add __isr_vector symbol
    • cortexm: disable FPU on Cortex-M4
    • cortexm: clean up Cortex-M target files
    • fe310: fix SPI read
    • gameboy-advance: Fix RGBA color interpretation
    • nrf52833: add PWM support
    • stm32l0: use unified UART logic
    • stm32: move f103 (bluepill) to common i2c code
    • stm32: separate altfunc selection for UART Tx/Rx
    • stm32: i2c implementation for F7, L5 and L4 MCUs
    • stm32: make SPI CLK fast to fix data issue
    • stm32: support SPI on L4 series
    • unix: avoid possible heap allocation with -opt=0
    • unix: use conservative GC by default
    • unix: use the tasks scheduler instead of coroutines
    • wasi: upgrade WASI version to wasi_snapshot_preview1
    • wasi: darwin: support basic file io based on libc
    • wasm: only export explicitly exported functions
    • wasm: use WASI ABI for exit function
    • wasm: scan globals conservatively
  • boards
    • arduino-mega1280: add support for the Arduino Mega 1280
    • arduino-nano-new: Add Arduino Nano w/ New Bootloader target
    • atsame54-xpro: add initial support this board
    • feather-m4-can: add initial support for this board
    • grandcentral-m4: add board support for Adafruit Grand Central M4 (SAMD51)
    • lgt92: update to new UART structure
    • microbit: remove LED constant
    • microbit-v2: add support for S113 SoftDevice
    • nucleol432: add support for this board
    • nucleo-l031k6: add this board
    • pca10059: initial support for this board
    • qtpy: fix msd-volume-name
    • qtpy: fix i2c setting
    • teensy40: move txBuffer allocation to UART declaration
    • teensy40: add UART0 as alias for UART1

0.17.0

  • command line
    • switch to LLVM 11 for static builds
    • support gdb debugging with AVR
    • add support for additional openocd commands
    • add -x flag to print commands
    • use LLVM 11 by default when linking LLVM dynamically
    • update go-llvm to use LLVM 11 on macOS
    • bump go.bug.st/serial to version 1.1.2
    • do not build LLVM with libxml to work around a bugo on macOS
    • add support for Go 1.16
    • support gdb daemonization on Windows
    • remove support for LLVM 9, to fix CI
    • kill OpenOCD if it does not exit with a regular quit signal
    • support -ocd-output on Windows
  • compiler
    • builder: parallelize most of the build
    • builder: remove unused cacheKey parameter
    • builder: add -mcpu flag while building libraries
    • builder: wait for running jobs to finish
    • cgo: add support for variadic functions
    • compiler: fix undefined behavior in wordpack
    • compiler: fix incorrect "exported function" panic
    • compiler: fix non-int integer constants (fixing a crash)
    • compiler: refactor and add tests
    • compiler: emit a nil check when slicing an array pointer
    • compiler: saturate float-to-int conversions
    • compiler: test float to int conversions and fix upper-bound calculation
    • compiler: support all kinds of deferred builtins
    • compiler: remove ir package
    • compiler: remove unnecessary main.main call workaround
    • compiler: move the setting of attributes to getFunction
    • compiler: create runtime types lazily when needed
    • compiler: move settings to a separate Config struct
    • compiler: work around an ARM backend bug in LLVM
    • interp: rewrite entire package
    • interp: fix alignment of untyped globals
    • loader: use name "main" for the main package
    • loader: support imports from vendor directories
    • stacksize: add support for DW_CFA_offset_extended
    • transform: show better error message in coroutines lowering
  • standard library
    • machine: accept configuration struct for ADC parameters
    • machine: make I2C.Configure signature consistent
    • reflect: implement PtrTo
    • runtime: refactor to simplify stack switching
    • runtime: put metadata at the top end of the heap
  • targets
    • atsam: add a length check to findPinPadMapping
    • atsam: improve USBCDC
    • atsam: avoid infinite loop when USBCDC is disconnected
    • avr: add SPI support for Atmega based chips
    • avr: use Clang for compiling C and assembly files
    • esp32: implement task based scheduler
    • esp32: enable the FPU
    • esp8266: implement task based scheduler
    • esp: add compiler-rt library
    • esp: add picolibc
    • nrf: refactor code a bit to reduce duplication
    • nrf: use SPIM peripheral instead of the legacy SPI peripheral
    • nrf: update nrfx submodule to latest commit
    • nrf52840: ensure that USB CDC interface is only initialized once
    • nrf52840: improve USBCDC
    • stm32: use stm32-rs SVDs which are of much higher quality
    • stm32: harmonization of UART logic
    • stm32: replace I2C addressable interface with simpler type
    • stm32: fix i2c and add stm32f407 i2c
    • stm32: revert change that adds support for channels in interrupts
    • wasm: implement a growable heap
    • wasm: fix typo in wasm_exec.js, syscall/js.valueLoadString()
    • wasm: Namespaced Wasm Imports so they don't conflict across modules, or reserved LLVM IR
    • wasi: support env variables based on libc
    • wasi: specify wasi-libc in a different way, to improve error message
  • boards
    • matrixportal-m4: add support for board Adafruit Matrix Portal M4
    • mkr1000: add this board
    • nucleo-f722ze: add this board
    • clue: correct volume name and add alias for release version of Adafruit Clue board
    • p1am-100: add support for the P1AM-100 (similar to Arduino MKR)
    • microbit-v2: add initial support based on work done by @alankrantas thank you!
    • lgt92: support for STM32L0 MCUs and Dragino LGT92 device
    • nicenano: nice!nano board support
    • circuitplay-bluefruit: correct internal I2C pin mapping
    • clue: correct for lack of low frequency crystal
    • digispark: split off attiny85 target
    • nucleo-l552ze: implementation with CLOCK, LED, and UART
    • nrf52840-mdk-usb-dongle: add this board

0.16.0

  • command-line
    • add initial support for LLVM 11
    • make lib64 clang include path check more robust
    • build: improve support for GOARCH=386 and add tests
    • gdb: add support for qemu-user targets
    • test: support non-host tests
    • test: add support for -c and -o flags
    • test: implement some benchmark stubs
  • compiler
    • builder: improve detection of clang on Fedora
    • compiler: fix floating point comparison bugs
    • compiler: implement negate for complex numbers
    • loader: fix linkname in test binaries
    • transform: add missing return pointer restore for regular coroutine tail calls
  • standard library
    • machine: switch default frequency to 4MHz
    • machine: clarify caller's responsibility in SetInterrupt
    • os: add LookupEnv() stub
    • reflect: implement Swapper
    • runtime: fix UTF-8 decoding
    • runtime: gc: use raw stack access whenever possible
    • runtime: use dedicated printfloat32
    • runtime: allow ranging over a nil map
    • runtime: avoid device/nxp dependency in HardFault handler
    • testing: implement dummy Helper method
    • testing: add Run method
  • targets
    • arm64: add support for SVCall intrinsic
    • atsamd51: avoid panic when configuring SPI with SDI=NoPin
    • avr: properly support the .rodata section
    • esp8266: implement Pin.Get function
    • nintendoswitch: fix crash when printing long lines (> 120)
    • nintendoswitch: add env parser and removed unused stuff
    • nrf: add I2C error checking
    • nrf: give more flexibility in picking SPI speeds
    • nrf: fix nrf52832 flash size
    • stm32f103: support wakeups from interrupts
    • stm32f405: add SPI support
    • stm32f405: add I2C support
    • wasi: add support for this target
    • wasi: use 'generic' ABI by default
    • wasi: remove --no-threads flag from wasm-ld
    • wasm: add instanceof support for WebAssembly
    • wasm: use fixed length buffer for putchar
  • boards
    • d1mini: add this ESP8266 based board
    • esp32: use board definitions instead of chip names
    • qtpy: add board definition for Adafruit QTPy
    • teensy40: add this board

0.15.0

  • command-line
    • add cached GOROOT to info subcommand
    • embed git-hash in tinygo-dev executable
    • implement tinygo targets to list usable targets
    • use simpler file copy instead of file renaming to avoid issues on nrf52840 UF2 bootloaders
    • use ToSlash() to specify program path
    • support flashing esp32/esp8266 directly from tinygo
    • when flashing call PortReset only on other than openocd
  • compiler
    • compileopts: add support for custom binary formats
    • compiler: improve display of goroutine wrappers
    • interp: don't panic in the Store method
    • interp: replace some panics with error messages
    • interp: show error line in first line of the traceback
    • loader: be more robust when creating the cached GOROOT
    • loader: rewrite/refactor much of the code to use go list directly
    • loader: use ioutil.TempDir to create a temporary directory
    • stacksize: deal with DW_CFA_advance_loc1
  • standard library
    • runtime: use waitForEvents when appropriate
  • wasm
    • wasm: Remove --no-threads from wasm-ld calls.
    • wasm: update wasi-libc dependency
  • targets
    • arduino-mega2560: fix flashing on Windows
    • arm: automatically determine stack sizes
    • arm64: make dynamic loader structs and constants private
    • avr: configure emulator in board files
    • cortexm: fix stack size calculation with interrupts
    • flash: add openocd settings to atsamd21 / atsamd51
    • flash: add openocd settings to nrf5
    • microbit: reelboard: flash using OpenOCD when needed
    • nintendoswitch: Add dynamic loader for runtime loading PIE sections
    • nintendoswitch: fix import cycle on dynamic_arm64.go
    • nintendoswitch: Fix invalid memory read / write in print calls
    • nintendoswitch: simplified assembly code
    • nintendoswitch: support outputting .nro files directly
  • boards
    • arduino-zero: Adding support for the Arduino Zero (#1365)
    • atsamd2x: fix BAUD value
    • atsamd5x: fix BAUD value
    • bluepill: Enable stm32's USART2 for the board and map it to UART1 tinygo's device
    • device/atsamd51x: add all remaining bitfield values for PCHCTRLm Mapping
    • esp32: add libgcc ROM functions to linker script
    • esp32: add SPI support
    • esp32: add support for basic GPIO
    • esp32: add support for the Espressif ESP32 chip
    • esp32: configure the I/O matrix for GPIO pins
    • esp32: export machine.PortMask* for bitbanging implementations
    • esp8266: add support for this chip
    • machine/atsamd51x,runtime/atsamd51x: fixes needed for full support for all PWM pins. Also adds some useful constants to clarify peripheral clock usage
    • machine/itsybitsy-nrf52840: add support for Adafruit Itsybitsy nrf52840 (#1243)
    • machine/stm32f4: refactor common code and add new build tag stm32f4 (#1332)
    • nrf: add SoftDevice support for the Circuit Playground Bluefruit
    • nrf: call sd_app_evt_wait when the SoftDevice is enabled
    • nrf52840: add build tags for SoftDevice support
    • nrf52840: use higher priority for USB-CDC code
    • runtime/atsamd51x: use PCHCTRL_GCLK_SERCOMX_SLOW for setting clocks on all SERCOM ports
    • stm32f405: add basic UART handler
    • stm32f405: add STM32F405 machine/runtime, and new board/target feather-stm32f405
  • build
    • all: run test binaries in the correct directory
    • build: Fix arch release job
    • ci: run tinygo test for known-working packages
    • ci: set git-fetch-depth to 1
    • docker: fix the problem with the wasm build (#1357)
    • Makefile: check whether submodules have been downloaded in some common cases
  • docs
    • add ESP32, ESP8266, and Adafruit Feather STM32F405 to list of supported boards

0.14.1

  • command-line
    • support for Go 1.15
  • compiler
    • loader: work around Windows symlink limitation

0.14.0

  • command-line
    • fix getDefaultPort() on non-English Windows locales
    • compileopts: improve error reporting of unsupported flags
    • fix test subcommand
    • use auto-retry to locate MSD for UF2 and HEX flashing
    • fix touchSerialPortAt1200bps on Windows
    • support package names with backslashes on Windows
  • compiler
    • fix a few crashes due to named types
    • add support for atomic operations
    • move the channel blocked list onto the stack
    • fix -gc=none
    • fix named string to []byte slice conversion
    • implement func value and builtin defers
    • add proper parameter names to runtime.initAll, to fix a panic
    • builder: fix picolibc include path
    • builder: use newer version of gohex
    • builder: try to determine stack size information at compile time
    • builder: remove -opt=0
    • interp: fix sync/atomic.Value load/store methods
    • loader: add Go module support
    • transform: fix debug information in func lowering pass
    • transform: do not special-case zero or one implementations of a method call
    • transform: introduce check for method calls on nil interfaces
    • transform: gc: track 0-index GEPs to fix miscompilation
  • cgo
    • Add LDFlags support
  • standard library
    • extend stdlib to allow import of more packages
    • replace master/slave terminology with appropriate alternatives (MOSI->SDO etc)
    • internal/bytealg: reimplement bytealg in pure Go
    • internal/task: fix nil panic in (*internal/task.Stack).Pop
    • os: add Args and stub it with mock data
    • os: implement virtual filesystem support
    • reflect: add Cap and Len support for map and chan
    • runtime: fix return address in scheduler on RISC-V
    • runtime: avoid recursion in printuint64 function
    • runtime: replace ReadRegister with AsmFull inline assembly
    • runtime: fix compilation errors when using gc.extalloc
    • runtime: add cap and len support for chans
    • runtime: refactor time handling (improving accuracy)
    • runtime: make channels work in interrupts
    • runtime/interrupt: add cross-chip disable/restore interrupt support
    • sync: implement sync.Cond
    • sync: add WaitGroup
  • targets
    • arm: allow nesting in DisableInterrupts and EnableInterrupts
    • arm: make FPU configuraton consistent
    • arm: do not mask fault handlers in critical sections
    • atmega2560: fix pin mapping for pins D2, D5 and the L port
    • atsamd: return an error when an incorrect PWM pin is used
    • atsamd: add support for pin change interrupts
    • atsamd: add DAC support
    • atsamd21: add more ADC pins
    • atsamd51: fix ROM / RAM size on atsamd51j20
    • atsamd51: add more pins
    • atsamd51: add more ADC pins
    • atsamd51: add pin change interrupt settings
    • atsamd51: extend pinPadMapping
    • arduino-nano33: use (U)SB flag to ensure that device can be found when not on default port
    • arduino-nano33: remove (d)ebug flag to reduce console noise when flashing
    • avr: use standard pin numbering
    • avr: unify GPIO pin/port code
    • avr: add support for PinInputPullup
    • avr: work around codegen bug in LLVM 10
    • avr: fix target triple
    • fe310: remove extra println left in by mistake
    • feather-nrf52840: add support for the Feather nRF52840
    • maixbit: add board definition and dummy runtime
    • nintendoswitch: Add experimental Nintendo Switch support without CRT
    • nrf: expose the RAM base address
    • nrf: add support for pin change interrupts
    • nrf: add microbit-s110v8 target
    • nrf: fix bug in SPI.Tx
    • nrf: support debugging the PCA10056
    • pygamer: add Adafruit PyGamer suport
    • riscv: fix interrupt configuration bug
    • riscv: disable linker relaxations during gp init
    • stm32f4disco: add new target with ST-Link v2.1 debugger
    • teensy36: add Teensy 3.6 support
    • wasm: fix event handling
    • wasm: add --no-demangle linker option
    • wioterminal: add support for the Seeed Wio Terminal
    • xiao: add support for the Seeed XIAO

0.13.1

  • standard library
    • runtime: do not put scheduler and GC code in the same section
    • runtime: copy stack scan assembly for GBA
  • boards
    • gameboy-advance: always use ARM mode instead of Thumb mode

0.13.0

  • 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

0.12.0

  • command line
    • add initial FreeBSD support
    • remove getting a serial port in gdb subcommand
    • add support for debugging through JLinkGDBServer
    • fix CGo when cross compiling
    • remove default port check for Digispark as micronucleus communicates directly using HID
    • differentiate between various serial/USB error messages
  • builder
    • improve detection of Clang headers
  • compiler
    • fix assertion on empty interface
    • don't crash when encountering types.Invalid
    • revise defer to use heap allocations when running a variable number of times
    • improve error messages for failed imports
    • improve "function redeclared" error
    • add globaldce pass to start of optimization pipeline
    • add support for debugging globals
    • implement RISC-V CSR operations as intrinsics
    • add support for CGO_ENABLED environment variable
    • do not emit debug info for extern globals (bugfix)
    • add support for interrupts
    • implement maps for arbitrary keys
    • interp: error location for "unknown GEP" error
    • wasm-abi: create temporary allocas in the entry block
  • cgo
    • add support for symbols in #define
    • fix a bug in number tokenization
  • standard library
    • machine: avoid bytes package in USB logic
    • runtime: fix external address declarations
    • runtime: provide implementation for internal/bytealg.IndexByte
  • targets
    • atsamd51: fix volatile usage
    • atsamd51: fix ADC, updating to 12-bits precision
    • atsamd51: refactor SPI pin configuration to only look at pin numbers
    • atsamd51: switch UART to use new pin configuration
    • atsamd51: fix obvious bug in I2C code
    • atsamd51: use only the necessary UART interrupts
    • atsamd51: refactor I2C pin handling to auto-detect pin mode
    • avr: use a garbage collector
    • fe310: use CLINT peripheral for timekeeping
    • fe310: add support for PLIC interrupts
    • fe310: implement UART receive interrupts
    • riscv: support sleeping in QEMU
    • riscv: add bare-bones interrupt support
    • riscv: print exception PC and code
    • wasm: implement memcpy and memset
    • wasm: include wasi-libc
    • wasm: use wasi ABI for basic startup/stdout
  • boards
    • arduino: make avrdude command line compatible with Windows
    • arduino-nano: add this board
    • arduino-nano33: fix UART1 and UART2
    • circuitplay-bluefruit: add this board
    • digispark: add clock speed and pin mappings
    • gameboy-advance: include compiler-rt in build
    • gameboy-advance: implement interrupt handler
    • hifive1b: add support for gdb subcommand
    • pyportal: add this board
    • pyportal: remove manual SPI pin mapping as now handled by default

0.11.0

  • command line
    • add support for QEMU in gdb subcommand
    • use builtin Clang when building statically, dropping the clang-9 dependency
    • search for default serial port on both macOS and Linux
    • windows: support tinygo flash directly by using win32 wmi
  • compiler
    • add location information to the IR checker
    • make reflection sidetables constant globals
    • improve error locations in goroutine lowering
    • interp: improve support for maps with string keys
    • interp: add runtime fallback for mapassign operations
  • standard library
    • machine: add support for SPI.Tx() on play.tinygo.org
    • machine: rename CPU_FREQUENCY to CPUFrequency()
  • targets
    • adafruit-pybadge: add Adafruit Pybadge
    • arduino-nano33: allow simulation on play.tinygo.org
    • arduino-nano33: fix default SPI pin numbers to be D13/D11/D12
    • circuitplay-express: allow simulation on play.tinygo.org
    • hifive1-qemu: add target for testing RISC-V bare metal in QEMU
    • riscv: fix heap corruption due to changes in LLVM 9
    • riscv: add support for compiler-rt
    • qemu: rename to cortex-m-qemu

0.10.0

  • 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 IOT

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

0.8.0

  • 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

0.7.1

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

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

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

0.5.0

  • 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

0.4.1

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

0.4.0

  • 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.

0.3.0

  • 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

0.2.0

  • command line
    • add version subcommand
  • compiler
    • fix a bug in floating point comparisons with NaN values
    • fix a bug when calling panic in package initialization code
    • add support for comparing complex64 and complex128
  • cgo
    • add support for external globals
    • add support for pointers and function pointers
  • standard library
    • fmt: initial support, fmt.Println works
    • math: support for most/all functions
    • os: initial support (only stdin/stdout/stderr)
    • reflect: initial support
    • syscall: add support for amd64, arm, and arm64