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v1.21.0

micropython/micropython

版本发布时间: 2023-10-06 08:09:41

micropython/micropython最新发布版本:v1.23.0(2024-05-31 13:03:47)

This release of MicroPython sees the renaming of built-in modules to remove the u-prefix, a new deflate module with optional compression support, the introduction of board variants, switching of the esp32 port to use IDF 5 together with improved heap management, support for BLE on RPi Pico W boards, and STM32H5xx support. The project is also now using codespell and ruff to improve code quality. New boards added in this release are: ARDUINO_NANO_ESP32 and UM_NANOS3 (esp32 port), ADAFRUIT_METRO_M7 (mimxrt port), ARDUINO_PORTENTA_C33 and VK_RA6M5 (renesas-ra port), ADAFRUIT_METRO_M4_EXPRESS (samd port), NUCLEO_L4A6ZG and STM32H573I_DK (stm32 port).

The renaming of built-in modules to remove the u-prefix -- for example utime becomes time, uasyncio becomes asyncio -- is done to improve compatibility with CPython and eliminate confusion about whether to import the u-version or the non-u-version of the name. Now, one should just always import the non-u-version and no longer think about u-naming. The only remaining module with a u-prefix is uctypes because it is not compatible with the CPython ctypes modules. The following modules are still available via their u-names for backwards compatibility: array, asyncio, binascii, bluetooth, collections, cryptolib, errno, hashlib, heapq, io, json, machine, os, platform, random, re, select, socket, ssl, struct, time, websocket. These modules (except for asyncio) are also extensible and can be overridden by a file with the same name, eg time.py. To force the import of a built-in, one must first clear (and subsequently restore) sys.path; the ability to write to the sys.path attribute has also been implemented in this release. For further information see the discussion at https://github.com/micropython/micropython/issues/9018.

Furthermore, importing itself has been tweaked and optimised, and importing of built-ins no longer touch the filesystem, which makes a typical built-in import take ~0.15ms rather than 3-5ms. For modules that fail to import, they are now removed from sys.modules, allowing the import to be attempted again. This required adding "NLR jump callbacks" to efficiently run some code if an exception is raised.

Additional improvements to the core runtime include support for conversion specifiers in f-strings (e.g. !r), speeding up of incremental GC cycles by tracking the last used block, addition of a new MICROPY_GC_SPLIT_HEAP_AUTO "auto grow heap" mode and support for pad bytes in struct format. The documentation, examples and test have also seen general improvements and additions.

For the extended modules, the zlib C module has been removed and replaced with a new MicroPython-specific deflate module and DeflateIO class that is optimised to provide efficient streaming compression and decompression. The zlib (and gzip) modules are now implemented in pure Python on top of the deflate module. The timeq module has been removed, it existed only for a previous version of (u)asyncio and is no longer used. In the ssl module, SSLContext has been added to be more compatible with CPython. The select module now supports using system/POSIX poll when possible and the unix port now uses this implementation instead of its own one. That means the unix port can now select/poll on custom Python objects that implement the appropriate ioctl. The socket module now supports SO_BROADCAST, and sys.std*.buffer objects now exist on unix. There is also a new esp-hosted network driver for external ESP32-based network coprocessors.

mpy-cross now allows reading source files from stdin and writing compiled code to stdout.

The esp8266 and esp32 ports add support for the Espressif ESP-NOW protocol, and the ability to set/get the power saving mode of the WLAN hardware. The esp8266 port adds board-variant support, combining all boards into a single ESP8266_GENERIC with FLASH_512K, FLASH_1M and OTA variants.

The esp32 port has now switched exclusively to ESP-IDF 5, and all existing components have been updated to work with this new IDF (except esp32.hall_sensor() which has been removed). The FSM ULP has been enabled for S2 and S3 chips, sockets now support SO_BINDTODEVICE, and board-named pins and the Pin.board dict have been implemented. The MicroPython heap has been reworked on this port to support the large variety of memory configurations: it now starts at 64kbytes and automatically grows as needed, with new segments allocated from the IDF heap. This means that boards with SPIRAM have much faster GC collection times if only a small amount of RAM is used, all available RAM can be used if needed, and the IDF has access to enough RAM for things like SSL sockets. For more information see https://github.com/micropython/micropython/pull/12141. The esp32 port has also had its generic boards consolidated and renamed to ESP32_GENERIC, ESP32_GENERIC_C3, ESP32_GENERIC_S2 and ESP32_GENERIC_S3, and some now have variants such as SPIRAM.

The mimxrt port has fixes and improvements to PWM and Pin.irq, as well as support for UART hardware flow control and UART.deinit. It has also seen integration of WiFi via the CYW43 driver, and Bluetooth via NimBLE. The mbedTLS bindings have enabled time validation of certificates.

The renesas-ra port has changed board names to match the product name, updated to use FSP v4.4.0, added support for: RA6M5 MCUs, machine PWM, DAC, RNG and SDCard classes, TinyUSB, Bluetooth via NimBLE, networking via lwIP, and mbedTLS.

Bluetooth support has also been added to the rp2 port for the Pico W board. And the RPi boards have been renamed from PICO to RPI_PICO, and PICO_W to RPI_PICO_W. Lightsleep has been fixed on this port so it works while WiFi is powered off, and time.time_ns() now has microsecond resolution.

The samd port sees the addition of SPI and QSPI flash drivers to support filesystems on external flash.

The stm32 port add support for STM32H5xx MCUs, basic support for the OCTOSPI peripheral, and USB support for STM32L1xx MCUs. New functions have been added to the stm module to support the sub-GHz radio on STM32WL55.

In micropython-lib, an extensive LoRa module has been added along with drivers for SX126x and SX127x chipsets, and the STM32WL55. This module supports both synchronous and asynchronous (asyncio) mode. Also, as part of the u-module renaming, urequests has been renamed to requests (but for backwards compatibility "import urequests" still works for now).

The change in code size since the previous release for various ports is (absolute and percentage change in the text section):

   bare-arm:    +192  +0.340%
minimal x86:    +310  +0.169%
   unix x64:   +4784  +0.610%
      stm32:    -524  -0.134%
     cc3200:    +280  +0.154%
    esp8266:   +8016  +1.151%
      esp32: +112133  +7.293%
     mimxrt:   +3624  +1.015%
 renesas-ra:   -2184  -0.348%
        nrf:    +616  +0.332%
        rp2:   +1920  +0.595%
       samd:   -7904  -2.953%

The changes that dominate these numbers are:

Performance is effectively unchanged since the previous release.

Note that this is the last release to use the current versioning scheme for nightly/unstable builds, whereby a build between releases is versioned as v1.20.0--g (following the release of v1.20.0). Moving forward, nightly builds will now be called preview builds and be versioned with the next release number. For example, if the last release was v1.21.0 then preview releases will be of the form v1.22.0-preview..g. For discussion see https://github.com/micropython/micropython/issues/12127.

Thanks to everyone who contributed to this release: Adam Green, Alexander Wilde, algonell, Andrew Leech, Andy Piper, Angus Gratton, Armin Brauns, brave ulysses, Brett Cannon, Brian 'redbeard' Harrington, Carlosgg, Chris Wilson, Christian Clauss, Damien George, Damien Tournoud, Daniël van de Giessen, David Grayson, David Lechner, David Yang, dotnfc, Duncan Lowther, Elecia White, elibdev, Elvis Pfutzenreuter, Felix Dörre, Francis Dela Cruz, Glenn Moloney, glenn20, iabdalkader, Ihor Nehrutsa, Jared Hancock, Jim Lipsey, Jim Mussared, Jon Nordby, Jonas Scharpf, Jos Verlinde, Kwabena W. Agyeman, Luca Burelli, marble, Mark Grosen, mbedNoobNinja, mcskatkat, Mingjie Shen, Mirko Vogt, Nicholas H. Tollervey, Oliver Joos, Ondrej Wisniewski, patrick, Peter Harper, Phil Howard, Philipp Ebensberger, Rene Straub, robert-hh, Sebastian Romero, Seon Rozenblum, stephanelsmith, stijn, Takeo Takahashi, Thomas, Tobias Thyrrestrup, UnexpectedMaker, Victor Rajewski, vsfos, Wang Xuancong, Wanlin Wang, Wilko Nienhaus, Wind-stormger, Yaroslav Halchenko, Yilin Sun, Yuuki NAGAO.

The work done in this release was funded in part through GitHub Sponsors, and in part by George Robotics, Planet Innovation, Espressif, Arduino, LEGO Education and OpenMV.

What follows is a detailed list of changes, generated from the git commit history, and organised into sections.

Main components

all:

py core:

extmod:

shared:

drivers:

mpy-cross:

lib:

Support components

docs:

examples:

tests:

tools:

CI:

The ports

all ports:

bare-arm port: no changes specific to this component/port

cc3200 port:

embed port: no changes specific to this component/port

esp8266 port:

esp32 port:

mimxrt port:

minimal port: no changes specific to this component/port

nrf port:

pic16bit port: no changes specific to this component/port

powerpc port:

qemu-arm port: no changes specific to this component/port

renesas-ra port:

rp2 port:

samd port:

stm32 port:

teensy port: no changes specific to this component/port

unix port:

webassembly port:

windows port:

zephyr port:

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查看：2023-10-06发行的版本

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