v4.0.2#

v4.0.2 introduces the initial RP2040 port (Raspberry Pi Pico / Arduino Nano RP2040 Connect board files), PixArt PAJ6100 and MT9M114 sensor support, a PDM audio filter library, and sensor improvements. STM32 ADC and the image-transfer path changed — read the breaking changes below.

Highlights#

  • Initial RP2040 port — Raspberry Pi Pico / Arduino Nano RP2040 Connect board files.

  • New sensors — PixArt PAJ6100 and a working MT9M114 driver.

  • PDM audio filter library; sensor.set_framerate() works for any FPS.

  • Breaking: the STM32 ADC driver was aligned with upstream and full MDMA image-transfer offload was enabled — see the breaking changes.

New features#

  • RP2040 port — added the RP2040 port with Raspberry Pi Pico and Arduino Nano RP2040 Connect board files (initial bring-up; WiFi/Bluetooth land in v4.1.0).

  • PixArt PAJ6100 camera sensor support and a working MT9M114 driver.

  • PDM audio filter library added to the audio path.

  • Sensor — sensor.set_framerate() now works for any FPS, a method to read the actual XCLK frequency was added, additional sensor resolutions are supported, and a disable_full_flush framebuffer option was added.

Other changes and improvements#

  • Snapshot error messages were made clearer; Ethernet updates and a low-power mode were added (Portenta).

Bug fixes#

  • Fixed the pyb.Servo timer channel state, the LSM6Dx IMU driver, the STM32 H7 dma_nohal_init, and a missing framesize init check.

Hardware and board support#

  • Raspberry Pi Pico / Arduino Nano RP2040 Connect — initial board files.

  • PixArt PAJ6100 and MT9M114 camera sensors.

Breaking API changes#

User-visible API breaks between v4.0.1 and v4.0.2.

Both breaking changes are behavior changes (same API, different results) — re-check affected scripts. Each commit hash links to its diff on GitHub.

STM32 ADC alignment and full MDMA offload (behavior)#

The STM32 ADC driver was aligned with the upstream MicroPython implementation, so machine.ADC behavior/readings may differ slightly from previous releases. Separately, full MDMA offload of image transfers was enabled, which speeds up capture but changes the transfer path and timing. Re-check ADC-dependent code and timing-sensitive captures.

Commits: 661169f85, 772bfab26

Migration checklist#

Re-validate any machine.ADC readings and timing-sensitive capture code against the aligned ADC driver and full MDMA offload (the behavior changes). All other scripts run unchanged.