.. _changelog_v3_2_0:

v3.2.0
======

v3.2.0 substantially improves the **FLIR Lepton** driver (DMA, scaling for
FLIR 1/3, faster UVC streaming), enables **exFAT** on the OpenMV 3 and 4,
updates **CMSIS-NN to 5.4.0**, and adds VSYNC-GPIO-output and USB-VCP
examples. It introduces **no breaking API changes** — v3.1.0 scripts run
unchanged.

.. contents:: On this page
   :local:
   :depth: 1

Highlights
----------

- **FLIR Lepton** — DMA-based capture, working scaling for FLIR 1/3, and
  faster UVC streaming.
- **exFAT** enabled on the OpenMV 3 and 4.
- **CMSIS-NN 5.4.0** update.
- **Examples** — VSYNC GPIO output and USB VCP.
- **No breaking API changes** — reflash and your v3.1.0 scripts run
  unchanged.

New features
------------

- **exFAT** — enabled the exFAT filesystem on the OpenMV 3 and 4.
- **Examples** — added a VSYNC-GPIO-output example and a USB-VCP example.

Other changes and improvements
------------------------------

- Updated CMSIS-NN to 5.4.0 (with refreshed NN training/test scripts and a
  labeled-image creation script); the IDE now detects the OpenMV disk via a
  hidden marker file; the configuration is parsed on soft resets; the FLIR
  Lepton now streams faster over UVC and sends the correct grayscale UVC
  descriptor for the MT9V034.

Bug fixes
---------

Camera and sensors:

- Got the FLIR Lepton driver working well for FLIR 1/3 with scaling, moved
  Lepton init to MSP, used DMA for Lepton 1 and 3 (with a dedicated VOSPI
  memory region), and fixed the MT9V034 snapshot path (removed the streaming
  callback workaround).

System and connectivity:

- Added a WINC patch set and fixed the WINC init timeout, the H7 DMA region
  size (made uncacheable via the MPU), the H7 SPI clock source, and the
  CMSIS-NN column-buffer size.

Hardware and board support
--------------------------

- **OpenMV 3 / 4** — exFAT filesystem support.

Breaking API changes
--------------------

v3.2.0 introduces **no breaking Python API changes**. Scripts that ran on
v3.1.0 run unchanged on v3.2.0 — just reflash the firmware.