.. _changelog_v3_9_2:

v3.9.2
======

v3.9.2 substantially improves the **TV driver** (higher resolution, scaling,
triple buffering), re-enables imlib features that now fit in flash, bumps the
ImageIO format version, and fixes the FLIR Lepton driver, F7 LCD triple
buffering, and grayscale color/Y filtering. It introduces **no breaking API
changes** — v3.9.1 scripts run unchanged.

.. contents:: On this page
   :local:
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Highlights
----------

- **TV driver** — higher resolution, scaling, and triple buffering.
- **More imlib features** re-enabled now that the extra code fits in flash.
- **Fixes** — FLIR Lepton driver (M4/M7), F7 LCD triple buffering, grayscale
  color and Y filtering.
- **No breaking API changes** — reflash and your v3.9.1 scripts run
  unchanged.

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

- **TV driver** — improved resolution, added scaling, and added triple
  buffering.
- Re-enabled imlib features and additional support that now fit in flash.

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

- Bumped the ImageIO format version; switched to RGB565 when a color table is
  used and to fast YUV macros; renamed and tidied several examples; enabled SD
  hardware flow control and used two stop bits for the debug UART connection.

Bug fixes
---------

Camera and display:

- Fixed the FLIR Lepton driver on the M4 and M7, F7 LCD triple-buffering
  issues, grayscale color and the Y filter, and DCMI de-init on sensor
  shutdown (added DCMI MSP de-init).

System:

- Fixed an issue with an old version of pygame in the desktop tooling.

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

v3.9.2 introduces **no breaking Python API changes**. Scripts that ran on
v3.9.1 run unchanged on v3.9.2 — just reflash the firmware.