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@aykevl aykevl released this May 12, 2021

This release is the combination of more than two months of work, including improvements to reflection, a big change to the PWM API to make it more powerful (including support for servos!), support for command line parameters and environment variables, many improvements to SAM and STM32 chip support. It also saw the addition of various new boards.

Note that this release drops support for Go 1.11 and Go 1.12, so if you're using one of those versions please upgrade to Go 1.13 or later.

  • 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
Assets 8