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tinygo/targets/atmega2560.json

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avr: add Arduino Mega 2560
5 years ago
{
"inherits": ["avr"],
"cpu": "atmega2560",
"build-tags": ["atmega2560", "atmega"],
all: add a flag to the command line to select the serial implementation This can be very useful for some purposes: * It makes it possible to disable the UART in cases where it is not needed or needs to be disabled to conserve power. * It makes it possible to disable the serial output to reduce code size, which may be important for some chips. Sometimes, a few kB can be saved this way. * It makes it possible to override the default, for example you might want to use an actual UART to debug the USB-CDC implementation. It also lowers the dependency on having machine.Serial defined, which is often not defined when targeting a chip. Eventually, we might want to make it possible to write `-target=nrf52` or `-target=atmega328p` for example to target the chip itself with no board specific assumptions. The defaults don't change. I checked this by running `make smoketest` before and after and comparing the results.
3 years ago
"serial": "uart",
avr: add Arduino Mega 2560
5 years ago
"ldflags": [
avr: drop GNU toolchain dependency - Use compiler-rt and picolibc instead of avr-libc. - Use ld.lld instead of avr-ld (or avr-gcc). This makes it much easier to get started with TinyGo on AVR because installing these extra tools (gcc-avr, avr-libc) can be a hassle. It also opens the door for future improvements such as ThinLTO. There is a code size increase but I think it's worth it in the long run. The code size increase can hopefully be reduced with improvements to the LLVM AVR backend and to compiler-rt.
2 years ago
"--defsym=_stack_size=512"
avr: add Arduino Mega 2560
5 years ago
],
"linkerscript": "src/device/avr/atmega2560.ld",
"extra-files": [
"targets/avr.S",
"src/device/avr/atmega2560.s"
]
}