In this release there are a wide range of improvements and additions to both the core and the ports. In the core the main improvement was to the native emitter to have much more comprehensive support for general Python features, such as generators and complex exception handling, and the generated machine code is smaller and retains its efficiency. Elsewhere, fuzzy testing was used to find and eliminate some corner-case bugs, user classes were optimised when they don’t use special accessors, underscores in numeric literals are now supported (PEP515), and the uio.IOBase class was added to allow user defined streams.
For the extended modules there is now a VfsPosix filesystem component, a new ucryptolib module with AES support, addition of ure.sub() and of uhashlib.md5, and the lwIP socket implementation now has working TCP listen/accept backlog.
Compared to the last release the minimal baseline core code size is reduced by about 2.2%, down by roughly 1500 bytes for bare-arm port and 3500 bytes for minimal x86 port. Most other ports have increased in size due to the addition of new features (eg ucryptolib, ure.sub).
The stm32 port sees the introduction of a new bootloader — mboot — which supports DFU upload via USB FS, USB HS, as well as a custom I2C protocol, and also support to program external SPI flash. There is significant refactoring of the USB device driver, improved VCP throughput, and support for 2x VCP interfaces on the one USB device. lwIP has been integrated, and support added for SDRAM. Cortex-M0 CPUs are now supported along with STM32F0 MCUs.
For the esp8266 port the heap is increased by 2kbytes, the radio is automatically put to sleep if no WLAN interfaces are active, and the UART can now be disconnected from the REPL and its RX buffer length configured. Upon soft-reset sockets are now cleaned up.
The esp32 port has added support for external SPI RAM, PPPoS functionality, improved performance and stability when using threads, and other general bug fixes.
There is a new nrf port for Nordic MCUs, currently supporting nRF51x and nRF52x chips.
The docs have now been unified so there is just one set of documentation covering all ports. And initial documentation for the esp32 port is added.
There are two changes at the Python API level that are not backwards with previous versions:
- uos.dupterm now requires that a stream passed to it is derived from uio.IOBase (or is a native stream object).
- The esp32 neopixel driver has had its default timing changed from 400kHz to 800kHz; existing code that didn’t explicitly specify the “timing” parameter in the NeoPixel constructor may need to be updated to specify this as “timing=0” to get 400kHz timing.
8-6-2021 (August 6, 2021) is the Snakiest day of the year and it’s also this year’s CircuitPython Day! The day highlights all things CircuitPython and Python on Hardware. See you there!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Maker Business — Over 500,000 manufacturing jobs are going unfilled
Wearables — Wings that shine
Electronics — Get the scoop on crystal capacitors
Python for Microcontrollers — Python on Microcontrollers Newsletter: EuroPython 2021, CircuitPython 7.0.0 alpha 5 and more! #Python #Adafruit #CircuitPython @micropython @ThePSF
Adafruit IoT Monthly — Smart Agriculture, an E-Ink Newspaper, and more!
Microsoft MakeCode — MakeCode for the micro:bit - 2021 Release!
EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey
New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — JP’s Product Pick of the Week — 4pm Eastern TODAY! 7/27/21 @adafruit @johnedgarpark #adafruit #newproductpick
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