tinygo-org/tinygo v0.41.0

0.41.0

on GitHub

This release is the most feature packed yet with over 150 commits to our main repo alone. We added Go 1.26 support to keep you up to date with the latest work from the mothership. We also have many improvements to our developer tooling and compatibility. And some big additions when it comes to hardware support, with ESP32 wireless, and the new Arduino UNO Q board too.

• general
  • go.mod, compiler: bump minimum Go version to 1.23
  • builder: support Go 1.26 now
  • feat: add inheritable-only field to filter processor-level targets (#5270)
  • feature: add esp32flash flash method for esp32s3/esp32c3/esp32/esp8266
  • flashing: introduce flash method 'esp32jtag' for esp32c3/esp32s3 targets
  • fashing: add "adb" flash method using Android Debug Bridge
  • main: auto-use best available flashing options on esp32
  • espflasher: update to espflasher 0.6.0
• compiler
  • implement method-set based AssignableTo and Implements (#5304)
  • simplify createObjectLayout
  • implement copy directly
  • fix min/max on floats by using intrinsics
  • add element layout to sliceAppend
  • add intrinsic for crypto/internal/constanttime.boolToUint8
  • fix SyscallN handling for Windows on Go 1.26+
• core
  • reflect: add TypeAssert
  • reflect: fix TypeAssert for structs
  • sync: add WaitGroup.Go
  • os: add UserCacheDir and UserConfigDir
  • os: implement Lchown function for changing file ownership (#5161)
  • testing: add b.ReportMetric()
  • errors: add errors package to passing list
  • internal/gclayout: use correct lengths
  • internal/abi: add EscapeNonString, EscapeToResultNonString
  • internal, runtime: add internal fips bool
  • internal/itoa: resurrect from Go stdlib
  • internal/syscall/unix: implement GetRandom for WASI targets
  • interp: make ptrtoint size mismatch a recoverable error
  • loader: support "all:" prefix in //go:embed patterns
  • loader, crypto/internal/entropy: fix 32 MiB RAM overflow on microcontrollers
  • loader, unicode/utf8: fix hiBits overflow on 16-bit AVR targets
  • builder: order embedded files deterministically
  • builder: fix panic in findPackagePath when using -size short
  • builder: fix SIGSEGV when stripping duplicate function definitions
  • builder, runtime: fix duplicate symbol error with Go 1.26+ on Windows
  • builder: use target-specific -march for RISC-V library compilation
  • transform: modify output format from the -print-allocs flag to match the go coverage tool format
  • cgo: allow for changes to short-enums flag
  • wasm: add more stubbed file operations
• machine
  • esp32c3: implement BlockDevice for esp32c3 flash
  • esp32c3: clear GPIO STATUS before dispatching pin callbacks
  • esp32c3: implement USBDevice using interrupts
  • esp32c3: add Enable stub for QEMU test target
  • esp32c3: fix interrupt disable handling
  • esp32c3: clear MCAUSE after handling interrupt
  • esp32c3: map missing IRAM sections in linker script
  • esp32c3: fix to use PROVIDE() for WiFi/BLE ROM function addresses to allow blob overrides
  • esp32c3: add WiFi/BLE ROM linker support
  • esp32c3: use TIMG0 alarm interrupt for sleepTicks instead of busy-waiting
  • esp32s3: implement Pin.SetInterrupt for GPIO pin change interrupts
  • esp32s3: use edge-triggered CPU interrupt for GPIO pin interrupts
  • esp32s3: add interrupt support (#5244)
  • esp32s3: switch USB implementation to use interrupts instead of polling
  • esp32s3: replace inline ISR with full interrupt vector handler
  • esp32s3: use TIMG0 alarm interrupt for sleepTicks
  • esp32s3: improve exception handlers, add procPin/procUnpin, and linker wrap flags
  • esp32s3: fix Xtensa register window spill using recursive call4 in task switching
  • esp32s3: update linker script and boot assembly for multi-page flash XIP mapping
  • esp32s3: add flash XIP boot assembly with cache/MMU init
  • esp32s3: implement SPI (#5169)
  • esp32s3: implement I2C interface (#5210)
  • esp32s3: implement RNG based on onboard hardware random number generator
  • esp32s3,esp32c3: add USB serial support
  • esp32s3,esp32c3: add txStalled flag to skip USB serial spin when no host
  • esp32s3,esp32c3: make USB Serial/JTAG writes non-blocking when FIFO is full
  • esp32c3/esp32s3: refactor ADC implementation to reduce code duplication
  • esp32s3,esp32c3: add ADC support (#5231)
  • esp32s3,esp32c3: add PWM support (#5215)
  • esp32c3/esp32s3: refactoring and corrections for SPI implementation
  • esp32xx: add WASM simulator support for ESP32-C3/ESP32-S3 targets
  • esp32: default SPI CS pin to NoPin when unset
  • esp: fix tinygo_scanCurrentStack to spill register windows
  • stm32: fix UART interrupt storm caused by uncleared overrun error
  • stm32: fix PWM problem due to register shifting
  • stm32: add STM32U585 target definition and runtime
  • stm32: add STM32U5 GPIO, pin interrupts, and UART support
  • stm32: add STM32U5 I2C support
  • stm32: add STM32U5 SPI support
  • stm32u585: implement ADC
  • stm32g0b1: add support (#5150)
  • stm32g0b1: add Watchdog + ADC support (#5158)
  • stm32l0: add flash support
  • stm32l0x1,l0x2: TIM: adapt to 32-bit register access
  • stm32g0: sync with updated stm32 device files
  • attiny85: add USI-based SPI support (#5181)
  • attiny85: add PWM support (#5171)
  • rp: add Close function to UART to allow for removing all system resources/power usage
  • rp: use blockReset() and unresetBlockWait() helper functions for peripheral reset/unreset
  • rp2: prevent PWM Period method overflow
  • rp2: add per-byte timeout budget for I2C (#5189)
  • feather-m0: export UART0 and pins
  • usb/cdc: better ring buffer implementation (#5209)
  • fix: replace ! with ~ for register mask
  • atmega328p_simulator: add correct build tag for arduino_uno after renaming
• net
  • update to Go 1.26.2 net package with UDP and JS improvements
• runtime
  • implement fminimum/fmaximum
  • make timeoffset atomic
  • add MemStats.HeapObjects
  • handle GODEBUG on wasip2 (#5312)
  • fix Darwin syscall return value truncation and lost arguments
  • add syscall.runtimeClearenv for Go 1.26
  • split syscall functions for darwin changes for 1.26
  • fix: init heap before random number seed on wasm platforms
• targets
  • add esp32s3-supermini board target
  • add support for Seeedstudio Xiao-RP2350 board
  • add Shrike Lite board (#5170)
  • rename arduino target to arduino-uno
  • add pins/setup for Arduino UNO Q board QWIIC connector
  • correct pin mapping for Arduino UNO Q STM32 MCU
  • add stm32u585 openocd commands for flashing on Arduino UNO Q
  • correct name/tag use for esp32s3-wroom1 board
  • modify esp32, esp32s3, esp32c3, & esp8266 targets to use built-in esp32flash
  • switch rp2040/rp2350 to default to tasks scheduler
  • change default stack size for esp32c3 and esp32s3 to 8196
  • swan: rename group build tag stm32l4x5 => stm32l4y5 to avoid clash with stm32 device name
  • nucleo-f722ze: add build-tag stm32f722
  • fix: set stm32u5x clock rate to default
  • create generic targets for esp32 boards
• libs
  • stm32-svd: update submodule
  • update tools/gen-device-svd for recent changes to stm32-svd file structure (#5212)
• build/test
  • build: use Golang 1.26 for all builds
  • build: actually use the version of llvm we are supposed to be testing by using brew link command
  • build: let scoop run updates to resolve binaryen install failures on Windows
  • ci: don't double zip release artifacts
  • test: increase default timeout from 1 to 2 minutes to prevent spurious CI fails
  • testdata: fix flaky timers test by draining ticker channel after Stop
  • testdata: more corpus entries (#5182)
  • add soypat/lneto to corpus
  • GNUmakefile: add context and expvar to stdlib tests
  • GNUmakefile: add encoding/xml to stdlib tests on Linux
  • main (test): skip mipsle test if the emulator is missing
  • make: remove machine without board from smoketest
  • stm32: add Arduino UNO Q to smoketests
  • flake: bump to nixpkgs 25.11
  • chore: update all github actions to latest versions
  • fix: use external 7zip for scoop installs on Windows