CircuitPython 6.2.0 Release Candidate 0 Released! @adafruit @circuitpython

Raspberry Pi Pico RP2040 and Adafruit Feather RP2040

This release, 6.2.0-rc.0, is the first release candidate for the stable release of CircuitPython 6.2.0. Notable changes since 6.2.0-beta.4 include displayio and vectorio fixes and improvements, many i.MX fixes and additions, and RP2040 I2C improvement. See Port status below for details on port stability for each port, and Known issues for known problems. If you find any issues with this release, please file an issue.

Download from circuitpython.org

Firmware downloads are available from the downloads page on circuitpython.org. The site makes it easy to select the correct file and language for your board.

Installation

To install follow the instructions in our new Welcome to CircuitPython! guide. To install the latest libraries, see this page in that guide.

Try the latest version of the Mu editor for creating and editing your CircuitPython programs and for easy access to the CircuitPython serial connection (the REPL).

Port status

CircuitPython has a number of “ports” that are the core implementation for a variety of microcontroller families. Stability varies on a per-port basis. As of this release, atmel-samd, cxd56 (Spresense), nrf, and stm for the F4 family are stable. esp32s2, raspberrypi, and stm for other STM chip families are being actively improved but may be missing functionality and have bugs. litex and mimxrt10xx are in an alpha state and will have bugs and missing functionality.

Changes since 6.2.0-beta.4

Full commit log is here.

Fixes and enhancements

  • Turn off remote wakeup in USB configuration descriptor. #4517. Thanks @dhalbert.
  • Correct TypeError message in time. #4509. Thanks @lesamouraipourpre.
  • Allow memoryview() to be used for RGBMatrix. #4501. Thanks @
  • bitbangio.SPI enhancements. #4497. Thanks @jepler.
  • displayio and vectorio internal improvements. Thanks @kmatch98.
  • Correct vectorio.Rectangle sizes. #4484. Thanks @kmatch98.
  • Correct displayioredrawing when using TileGrid.transform_xy. #4464. Thanks @kmatch98.
  • Fix support for MS25R1635F chip. #4460. Thanks @lyusupov.
  • Handle 4-bit colors in bitmaptools properly. #4454, #4455. Thanks @jepler and @kmatch98.
  • Improve handling of dirty areas in displayio.Bitmap. #4432. Thanks @jepler.
  • Mark bitmap area as dirty in bitmaptools.arrayblit(). #4430. Thanks @jepler.
  • display.BitMap can be a memoryview(). #4429. Thanks @jepler.
  • Add reverse_rows capability to bitmaptools.readinto(). #4428. Thanks @kmatch98.

Port and board-specific changes

  • ESP32-S2
    • Use correct byte order for recvfrom_into() port. #4465. Thanks @anecdata.
  • i.MX
    • Fix assertion in busio.UART. #4518. Thanks @jepler.
    • Fix UART pin checking. #4513. Thanks @jepler.
    • Fix SPI gaps. #4487. Thanks @jepler.
    • Correct SPI baudrate. #4474. Thanks @jepler.
    • Fix reset to bootloader. #4442. Thanks @jepler.
  • nRF
    • Fix BLE remote service list crash; fix central pairing. #4437. Thanks @tannewt.
  • RP2040
    • Allow mpconfigboard.mk to override additional build flags. #4519. Thanks @jepler.
    • Calculate I2C SDA hold time, fixing I2C problems with several devices.  #4508, #4499. Thanks @fivdi and @dhalbert.
    • Use nvm.toml for flash settings. #4446. Thanks @tannewt.
  • Spresense
  • STM32
  • i.MX1010 EVK
    • Delete pins that are not connected. #4443. Thanks @jepler.
  • Metro M7 1011
    • Fix flash capacity. #4441. Thanks @jepler.
    • Enable USB MIDI, change flash chip, fix compiler warnings. #4435. Thanks @jepler.
  • QT Py RP2040
    • Revise board definition. #4456. Thanks @ladyada.

Build and infrastructure changes

  • Remove problematic sentence from bug issue template. #4511. Thanks @jepler.
  • List modules for alias boards. #4507. Thanks @Neradoc.
  • Use allowed language list when building circuitpython.org information. #4483. Thanks @Neradoc.
  • Use nvm.toml data for flash device information. #4481. Thanks @tannewt.
  • Use gcc @file mechanism to shorten linker command line. #4480. Thanks @tannewt.
  • Correct USB mount checking so that CIRCUITPY_USB_MSC = 0 will compile. #4462. Thanks @jepler.

Documentation

  • (no PRs in this category)

Translation Additions and Improvements

  • English – UK (new translation). Thanks @garethcoleman. Enabled by #4521. Thanks @dhalbert.
  • French. Thanks @hugodahl.
  • Portuguese – Brazil. Thanks @wtuemura .
  • Spanish. Thanks. @jposada202020.
  • Swedish. Thanks @bergdahl

Breaking changes since 5.x

  • i2cslave is now i2cperipheral and the class in it is changed as well.
  • The stop kwarg has been removed from I2C.writeto(). If no stop is desired, then use writeto_then_readfrom.
  • The default speed of busio.I2C and board.I2C is now 100khz, not 400khz as before. Use busio.I2C to set the speed explicitly.
  • _bleio.ConnectionError has been removed. Code will now raise the native ConnectionError instead.

Known issues

  • See https://github.com/adafruit/circuitpython/issues for other issues.

Thanks

Thank you to all who used, tested, and contributed since 6.2.0-beta.4, including @anecdata, @bergdahl, @d-c-d, @deshipu, @dhalbert, @FoamyGuy, @gamblor21, @garethhcoleman, @hexthat, @hierophect, @hugodahl, @jepler, @jposada202020, @kmatch98, @ladyada, @lesamouraipourpre, @lyusupov, @miclooking, @microDev1, @Neradoc, @tannewt, @tyomitch, @WarriorOfWire, @weblate, @wtuemura, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

New boards since 6.2.0-beta.4

  • Adafruit ItsbyBitsy RP2040. #4459. Thanks @ladyada.
  • Adafruit Rotary Trinkey. #4449. Thanks @ladyada.
  • Adafruit FunHouse. #4439. Thanks @dhalbert.

Breaking changes since 5.x

  • i2cslave is now i2cperipheral and the class in it is changed as well.
  • The stop kwarg has been removed from I2C.writeto(). If no stop is desired, then use writeto_then_readfrom.
  • The default speed of busio.I2C and board.I2C is now 100khz, not 400khz as before. Use busio.I2C to set the speed explicitly.
  • _bleio.ConnectionError has been removed. Code will now raise the native ConnectionError instead.

Known issues

  • See https://github.com/adafruit/circuitpython/issues for other issues.

Thanks

Thank you to all who used, tested, and contributed since 6.2.0-beta.4, including [[FILLIN]], and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

Documentation

Documentation is available in readthedocs.io.

This release is based on MicroPython 1.9.4 @25ae98f. Support upstream MicroPython by purchasing a PyBoard (from Adafruit here) or sponsoring MicroPython on GitHub.

Download from circuitpython.org

Firmware downloads are available from the downloads page on circuitpython.org. The site makes it easy to select the correct file and language for your board.

Installation

To install follow the instructions in our new Welcome to CircuitPython! guide. To install the latest libraries, see this page in that guide.

Try the latest version of the Mu editor for creating and editing your CircuitPython programs and for easy access to the CircuitPython serial connection (the REPL).


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