6e87aeb841
Upon start-up, _boot module is executed from frozen files to do early initialization, e.g. create and mount the flash filesystem. Then "boot.py" is executed if it exists in the filesystem. Finally, "main.py" is executed if exists to allow start-on-boot user applications. This allows a user to make a custom boot file or startup application without recompiling the firmware, while letting to do early initialization in Python code. Based on RFC https://github.com/micropython/micropython/issues/1955. |
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|---|---|---|
| .. | ||
| scripts | ||
| tests | ||
| eagle.rom.addr.v6.ld | ||
| esp8266.ld | ||
| esp_mphal.c | ||
| esp_mphal.h | ||
| espneopixel.c | ||
| espneopixel.h | ||
| esppwm.c | ||
| esppwm.h | ||
| ets_alt_task.c | ||
| ets_alt_task.h | ||
| etshal.h | ||
| fatfs_port.c | ||
| gccollect.c | ||
| gccollect.h | ||
| gchelper.s | ||
| lexerstr32.c | ||
| main.c | ||
| Makefile | ||
| makeimg.py | ||
| modesp.c | ||
| modmachine.c | ||
| modnetwork.c | ||
| modonewire.c | ||
| modpyb.c | ||
| modpyb.h | ||
| modpybadc.c | ||
| modpybi2c.c | ||
| modpybpin.c | ||
| modpybpwm.c | ||
| modpybrtc.c | ||
| modpybrtc.h | ||
| modpybspi.c | ||
| modpybuart.c | ||
| moduos.c | ||
| modutime.c | ||
| mpconfigport.h | ||
| qstrdefsport.h | ||
| README.md | ||
| strtoll.c | ||
| uart_register.h | ||
| uart.c | ||
| uart.h | ||
| user_config.h | ||
| utils.c | ||
| utils.h | ||
MicroPython port to ESP8266
This is a highly experimental port of MicroPython for the WiFi modules based on Espressif ESP8266 chip.
WARNING: The port is highly experimental and any APIs are subject to change.
Currently implemented features include:
- REPL (Python prompt) over UART0.
- Garbage collector, exceptions.
- Unicode support.
- Builtin modules: gc, array, collections, io, struct, sys, esp, network, many more.
- Arbitrary-precision long integers and 30-bit precision floats.
- Basic WiFi support.
- Sockets using modlwip.
- GPIO and bit-banging I2C, SPI support.
- 1-Wire and WS2812 (aka Neopixel) protocols support.
On the TODO list:
- Full wifi support.
- Internal filesystem using the flash.
- ...
Work-in-progress documentation is available at http://docs.micropython.org/en/latest/esp8266/ .
Build instructions
The tool chain required for the build is the OpenSource ESP SDK, which can be
found at https://github.com/pfalcon/esp-open-sdk. Clone this repository and
run make in its directory to build and install the SDK locally. Make sure
to add toolchain bin directory to your PATH. Read esp-open-sdk's README for
additional important information on toolchain setup.
Add the external dependencies to the MicroPython repository checkout:
$ git submodule update --init
See the README in the repository root for more information about external dependencies.
Then, to build MicroPython for the ESP8266, just run:
$ cd esp8266
$ make
This will produce binary images in the build/ subdirectory. If you install
MicroPython to your module for the first time, or after installing any other
firmware, you should erase flash completely:
esptool.py --port /dev//ttyXXX erase_flash
Erase flash also as a troubleshooting measure, if a module doesn't behave as expected.
To flash MicroPython image to your ESP8266, use:
$ make deploy
This will use the esptool.py script to download the images. You must have
your ESP module in the bootloader mode, and connected to a serial port on your PC.
The default serial port is /dev/ttyACM0. To specify another, use, eg:
$ make PORT=/dev/ttyUSB0 deploy
The image produced is firmware-combined.bin, to be flashed at 0x00000.
Troubleshooting
While the port is still in alpha, it's known to be generally stable. If you experience strange bootloops, crashes, lockups, here's a list to check against:
- You didn't erase flash before programming MicroPython firmware.
- Firmware can be occasionally flashed incorrectly. Just retry. Recent esptool.py versions have --verify option.
- Power supply you use doesn't provide enough power for ESP8266 or isn't stable enough.
- A module/flash may be defective (not unheard of for cheap modules).
Please consult dedicated ESP8266 forums/resources for hardware-related problems.