d80174d7c3
There is an issue sending 1 byte on the SPI bus using DMA, but it only occurs when the transmit is done for the first time after initialising the SPI and DMA peripherals. All other cases (sending 2 or more bytes, doing send_recv, doing recv first) work okay. We sidestep this issue by using polling (not DMA) for all 1 byte transfers. This is fine because a 1 byte transfer can't be interrupted and doesn't need the benefits of DMA (and using polling for this case is more efficient). Resolves #1456. |
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| bare-arm | ||
| cc3200 | ||
| docs | ||
| drivers | ||
| esp8266 | ||
| examples | ||
| extmod | ||
| lib | ||
| logo | ||
| minimal | ||
| pic16bit | ||
| py | ||
| qemu-arm | ||
| stmhal | ||
| teensy | ||
| tests | ||
| tools | ||
| unix | ||
| windows | ||
| .gitattributes | ||
| .gitignore | ||
| .travis.yml | ||
| ACKNOWLEDGEMENTS | ||
| CODECONVENTIONS.md | ||
| CONTRIBUTING.md | ||
| LICENSE | ||
| README.md | ||
README.md
[![Build Status][travis-img]][travis-repo] [![Coverage Status][coveralls-img]][coveralls-repo] [![Issue Stats][istats-pr-img]][istats-pr-repo] [![Issue Stats][istats-issue-img]][istats-issue-repo] [travis-img]: https://travis-ci.org/micropython/micropython.png?branch=master [travis-repo]: https://travis-ci.org/micropython/micropython [coveralls-img]: https://coveralls.io/repos/micropython/micropython/badge.png?branch=master [coveralls-repo]: https://coveralls.io/r/micropython/micropython?branch=master [istats-pr-img]: http://issuestats.com/github/micropython/micropython/badge/pr [istats-pr-repo]: http://issuestats.com/github/micropython/micropython [istats-issue-img]: http://issuestats.com/github/micropython/micropython/badge/issue [istats-issue-repo]: http://issuestats.com/github/micropython/micropython
The Micro Python project
This is the Micro Python project, which aims to put an implementation of Python 3.x on microcontrollers and small embedded systems.
WARNING: this project is in beta stage and is subject to changes of the code-base, including project-wide name changes and API changes.
Micro Python implements the entire Python 3.4 syntax (including exceptions, "with", "yield from", etc.). The following core datatypes are provided: str (including basic Unicode support), bytes, bytearray, tuple, list, dict, set, frozenset, array.array, collections.namedtuple, classes and instances. Builtin modules include sys, time, and struct. Note that only subset of Python 3.4 functionality implemented for the data types and modules.
See the repository www.github.com/micropython/pyboard for the Micro Python board, the officially supported reference electronic circuit board.
Major components in this repository:
- py/ -- the core Python implementation, including compiler, runtime, and core library.
- unix/ -- a version of Micro Python that runs on Unix.
- stmhal/ -- a version of Micro Python that runs on the Micro Python board with an STM32F405RG (using ST's Cube HAL drivers).
- minimal/ -- a minimal Micro Python port. Start with this if you want to port Micro Python to another microcontroller.
Additional components:
- bare-arm/ -- a bare minimum version of Micro Python for ARM MCUs. Used mostly to control code size.
- teensy/ -- a version of Micro Python that runs on the Teensy 3.1 (preliminary but functional).
- pic16bit/ -- a version of Micro Python for 16-bit PIC microcontrollers.
- cc3200/ -- a version of Micro Python that runs on the CC3200 from TI.
- esp8266/ -- an experimental port for ESP8266 WiFi modules.
- tests/ -- test framework and test scripts.
- tools/ -- various tools, including the pyboard.py module.
- examples/ -- a few example Python scripts.
- docs/ -- official documentation in RST format.
"make" is used to build the components, or "gmake" on BSD-based systems. You will also need bash and Python (at least 2.7 or 3.3).
The Unix version
The "unix" port requires a standard Unix environment with gcc and GNU make. x86 and x64 architectures are supported (i.e. x86 32- and 64-bit), as well as ARM and MIPS. Making full-featured port to another architecture requires writing some assembly code for the exception handling and garbage collection. Alternatively, fallback implementation based on setjmp/longjmp can be used.
To build (*):
$ cd unix
$ make
Then to give it a try:
$ ./micropython
>>> list(5 * x + y for x in range(10) for y in [4, 2, 1])
Learn about command-line options (in particular, how to increase heap size which may be needed for larger applications):
$ ./micropython --help
Run complete testsuite:
$ make test
Unix version comes with a builtin package manager called upip, e.g.:
$ ./micropython -m upip install micropython-pystone
$ ./micropython -m pystone
Browse available modules on PyPI. Standard library modules come from micropython-lib project.
(*) Debian/Ubuntu/Mint derivative Linux distros will require build-essentials, libffi-dev and pkg-config packages installed. If you have problems with some dependencies, they can be disabled in unix/mpconfigport.mk .
The STM version
The "stmhal" port requires an ARM compiler, arm-none-eabi-gcc, and associated bin-utils. For those using Arch Linux, you need arm-none-eabi-binutils and arm-none-eabi-gcc packages from the AUR. Otherwise, try here: https://launchpad.net/gcc-arm-embedded
To build:
$ cd stmhal
$ make
You then need to get your board into DFU mode. On the pyboard, connect the 3V3 pin to the P1/DFU pin with a wire (on PYBv1.0 they are next to each other on the bottom left of the board, second row from the bottom).
Then to flash the code via USB DFU to your device:
$ make deploy
You will need the dfu-util program, on Arch Linux it's dfu-util-git in the AUR. If the above does not work it may be because you don't have the correct permissions. Try then:
$ sudo dfu-util -a 0 -d 0483:df11 -D build-PYBV10/firmware.dfu
Building the documentation locally
Install Sphinx, and optionally (for the RTD-styling), sphinx_rtd_theme, preferably in a virtualenv:
pip install sphinx
pip install sphinx_rtd_theme
In micropython/docs, build the docs:
make MICROPY_PORT=<port_name> BUILDDIR=<port_name>/build html
Where <port_name> can be unix, pyboard, wipy or esp8266.
You'll find the index page at micropython/docs/<port_name>/build/html/index.html.