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tinygo/targets/esp32.json

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esp: add support for the Espressif ESP32 chip This is only very minimal support. More support (such as tinygo flash, or peripheral access) should be added in later commits, to keep this one focused. Importantly, this commit changes the LLVM repo from llvm/llvm-project to tinygo-org/llvm-project. This provides a little bit of versioning in case something changes in the Espressif fork. If we want to upgrade to LLVM 11 it's easy to switch back to llvm/llvm-project until Espressif has updated their fork.
4 years ago
{
"inherits": ["xtensa"],
"cpu": "esp32",
"build-tags": ["esp32", "esp"],
esp32: implement task based scheduler This has been a *lot* of work, trying to understand the Xtensa windowed registers ABI. But in the end I managed to come up with a very simple implementation that so far seems to work very well. I tested this with both blinky examples (with blinky2 slightly edited) and ./testdata/coroutines.go to verify that it actually works. Most development happened on the ESP32 QEMU fork from Espressif (https://github.com/espressif/qemu/wiki) but I also verified that it works on a real ESP32.
4 years ago
"scheduler": "tasks",
esp: add support for the Espressif ESP32 chip This is only very minimal support. More support (such as tinygo flash, or peripheral access) should be added in later commits, to keep this one focused. Importantly, this commit changes the LLVM repo from llvm/llvm-project to tinygo-org/llvm-project. This provides a little bit of versioning in case something changes in the Espressif fork. If we want to upgrade to LLVM 11 it's easy to switch back to llvm/llvm-project until Espressif has updated their fork.
4 years ago
"linker": "xtensa-esp32-elf-ld",
esp32: implement task based scheduler This has been a *lot* of work, trying to understand the Xtensa windowed registers ABI. But in the end I managed to come up with a very simple implementation that so far seems to work very well. I tested this with both blinky examples (with blinky2 slightly edited) and ./testdata/coroutines.go to verify that it actually works. Most development happened on the ESP32 QEMU fork from Espressif (https://github.com/espressif/qemu/wiki) but I also verified that it works on a real ESP32.
4 years ago
"default-stack-size": 2048,
esp: add support for the Espressif ESP32 chip This is only very minimal support. More support (such as tinygo flash, or peripheral access) should be added in later commits, to keep this one focused. Importantly, this commit changes the LLVM repo from llvm/llvm-project to tinygo-org/llvm-project. This provides a little bit of versioning in case something changes in the Espressif fork. If we want to upgrade to LLVM 11 it's easy to switch back to llvm/llvm-project until Espressif has updated their fork.
4 years ago
"cflags": [
"-mcpu=esp32"
],
esp32: use the compiler-rt library for extra routines These routines are necessary to compile testdata/float.go.
4 years ago
"rtlib": "compiler-rt",
esp: add picolibc With this change, it is possible to fully use CGo on ESP32/ESP8266 chips. The following will work: tinygo flash -target=d1mini -port=/dev/ttyUSB0 ./testdata/cgo/ tinygo flash -target=esp32-mini32 -port=/dev/ttyUSB0 ./testdata/cgo/ Previously it would produce output like the following: /tmp/tinygo905539688/main.o:(.literal.runtime.run$1$gowrapper+0x150): undefined reference to `strcpy' /tmp/tinygo905539688/main.o:(.literal.runtime.run$1$gowrapper+0x154): undefined reference to `strlen'
4 years ago
"libc": "picolibc",
esp: add support for the Espressif ESP32 chip This is only very minimal support. More support (such as tinygo flash, or peripheral access) should be added in later commits, to keep this one focused. Importantly, this commit changes the LLVM repo from llvm/llvm-project to tinygo-org/llvm-project. This provides a little bit of versioning in case something changes in the Espressif fork. If we want to upgrade to LLVM 11 it's easy to switch back to llvm/llvm-project until Espressif has updated their fork.
4 years ago
"linkerscript": "targets/esp32.ld",
"extra-files": [
esp32: implement task based scheduler This has been a *lot* of work, trying to understand the Xtensa windowed registers ABI. But in the end I managed to come up with a very simple implementation that so far seems to work very well. I tested this with both blinky examples (with blinky2 slightly edited) and ./testdata/coroutines.go to verify that it actually works. Most development happened on the ESP32 QEMU fork from Espressif (https://github.com/espressif/qemu/wiki) but I also verified that it works on a real ESP32.
4 years ago
"src/device/esp/esp32.S",
"src/internal/task/task_stack_esp32.S"
esp32: support flashing directly from tinygo Right now this requires setting the -port parameter, but other than that it totally works (if esptool.py is installed). It works by converting the ELF file to the custom ESP32 image format and flashing that using esptool.py.
4 years ago
],
"binary-format": "esp32",
"flash-command": "esptool.py --chip=esp32 --port {port} write_flash 0x1000 {bin} -ff 80m -fm dout"
esp: add support for the Espressif ESP32 chip This is only very minimal support. More support (such as tinygo flash, or peripheral access) should be added in later commits, to keep this one focused. Importantly, this commit changes the LLVM repo from llvm/llvm-project to tinygo-org/llvm-project. This provides a little bit of versioning in case something changes in the Espressif fork. If we want to upgrade to LLVM 11 it's easy to switch back to llvm/llvm-project until Espressif has updated their fork.
4 years ago
}