CircuitPython has a number of "ports" that are the core implementations for different microcontroller families. Stability varies on a per-port basis. As of this release, these ports are consider stable:
atmel-samd: Microchip SAMD21, SAMx5x
cxd56: Sony Spresense
espressif: Espressif ESP32-S2
nrf: Nordic nRF52840, nRF52833
raspberrypi: Raspberry Pi RP2040
stm: ST STM32F4 chip family
These ports are considered alpha and will have bugs and missing functionality:
broadcom: Raspberry Pi boards such as RPi 4, RPi Zero 2W
espressif: ESP32-S3, ESP32-C3
mimxrt10xx: NXP i.MX RT10xxx
stm: ST non-STM32F4 chip families
Changes since 7.3.0
Fixes and enhancements
Update frozen libraries. #6517. Thanks @dhalbert.
Port and board-specific changes
Fix allocation of multiple rotaryio.IncrementalEncoder objects. #6430. Thanks @dhalbert.
Fix crash when waking up from sleep when display is in use. #6512. Backport of #6486. Thanks @DavePutz.
Handle BLE disconnect when reading. #6513. Backport of #6495. Thanks @DavePutz.
Make SPI DMA setup be atomic. Fixes hangs on Adafruit MatrixPortal. #6498. Thanks @dhalbert.
Adafruit Circuit Playground Express boards: Do not freeze unneeded code. #6508. Backport of #6346. Thanks @Neradoc.
Build and infrastructure changes
Improve Espressif build cache key handling. #6506. Backport of #6494, #6497. Thanks @jepler.
New boards since 7.3.0
See https://github.com/adafruit/circuitpython/issues for other issues, including issues still to be addressed for:
Thank you to all who used, tested, and contributed since 7.3.0, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.
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