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 7.2.4
Fixes and enhancements
Fix board.UART() errors, especially on RP2040, due to ringbuf buffer freeing. #6238. Thanks @dhalbert.
Fix MP3Decoder looping. #6230. Thanks @jepler.
Port and board-specific changes
Correctly mark PWM peripheral as unused during reset. #6233. Thanks @jepler.
Update busio.UART interrupt handler; avoids hangs due to unconnected RX pin. #6240. Thanks @dhalbert.
Build and infrastructure changes
Avoid clang compiler warning when building mpy-cross. #6231. Thanks @jepler.
New boards since 7.2.4
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 7.2.4, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.
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