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Micro Python port to ESP8266
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============================
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This is a port of Micro Python to the Espressif ESP8266 wifi module.
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Currently implemented features include:
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- REPL (Python prompt) over UART0.
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- 24k heap RAM available for Python code.
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- Garbage collector, exceptions.
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- Unicode support.
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- Builtin modules: gc, array, collections, io, struct, sys.
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- C long-long type used as bignum implementation (gives 64 signed ints).
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Note that floating-point numbers are not supported.
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On the TODO list:
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- Wifi support.
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- GPIO support.
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- Internal filesystem using the flash.
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- ...
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Build instructions
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------------------
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The tool chain required for the build is the OpenSource ESP SDK, which can be
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found at <https://github.com/pfalcon/esp-open-sdk>. Clone this repository and
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run `make` in its directory to build and install the SDK locally.
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Then, to build Micro Python for the ESP8266, just run:
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```bash
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$ make
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```
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This should produce binary images in the `build/` subdirectory. To flash them
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to your ESP8266, use:
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```bash
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$ make deploy
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```
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This will use the `esptool.py` script to download the images. You must have
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your ESP module in the bootloader, and connected to a serial port on your PC.
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The default serial port is `/dev/ttyACM0`. To specify another, use, eg:
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```bash
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$ make PORT=/dev/ttyUSB0 deploy
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```
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The images that are built are:
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- `firmware.elf-0x00000.bin`: to be flashed at 0x00000
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- `firmware.elf-0x10000.bin`: to be flashed at 0x10000
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There is also a combined image, made up of the above 2 binary files with the
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appropriate padding:
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- `firmware-combined.bin`: to be flashed at 0x00000
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