v1.1.0

v1.1.0 is the foundational architecture release: it drops the early custom peripheral modules in favor of standard MicroPython built-ins, moves the imaging API into the image module and the frame-rate clock into time, and adds built-in Haar cascades, get_pixel() / set_pixel(), OpenMV 2 board support, and USB-CDC debugging. It is a heavily breaking, API-defining release — read the breaking changes below.

Highlights

  • MicroPython built-ins — the custom gpio / led / spi / socket / wlan / uart / file / select modules were removed in favor of MicroPython’s pyb / machine.

  • image module — Image() / HaarCascade() / descriptors are now in the image module.

  • time.clock — the frame-rate clock moved into the time module.

  • Built-in Haar cascades — HaarCascade("frontalface") / HaarCascade("eye") (no file needed).

  • OpenMV 2 board support and USB-CDC debugging.

  • Breaking: the module structure was redefined — see the breaking changes.

New features

  • Image — added Image.get_pixel(x, y) / set_pixel() and img[i] subscript pixel access; built-in flash Haar cascades (HaarCascade("frontalface") / HaarCascade("eye")) and a stages= keyword to limit cascade stages; draw_string() works on grayscale images.

  • Sensor — added sensor.set_colorbar(), sensor.set_saturation(), and the QQVGA2 framesize.

  • mlx — mlx.read(type) with mlx.RAINBOW / mlx.GRAYSCALE output.

  • Debugging — implemented debugging over USB CDC, a firmware fw_version() query, per-board firmware (OpenMV 1 / OpenMV 2), and self-test / colorbar scripts; fatal/parse errors are logged to flash.

Other changes and improvements

  • Out-of-memory now raises MemoryError instead of OSError; scripts run with exception re-raise so errors print instead of crashing; the serial baud rate is configurable (default 921600); a larger flash filesystem; the sensor pixel clock was lowered to 54 MHz for capture stability; sensor.reset() relies on a sensor soft reset only.

Bug fixes

  • Fixed template matching, find_features() repeating the first object, SCCB/I2C atomic register access, SD-card chip detect, soft-I2C pin mapping, fast_cbrtf / LAB color accuracy, and integral-image / median-filter memory use on the OpenMV 1 / 2.

Hardware and board support

  • OpenMV 2 (STM32F427) board support (and OpenMV 3 hardware design); MCO used as the sensor clock on the OpenMV 2.

Breaking API changes

User-visible API breaks between v1.0.3-beta and v1.1.0. Scope: Python C-modules in modules/ and Python libraries in scripts/libraries/.

Each change is tagged with its impact:

  • major — affects most scripts that used the feature; you will need to port code.

  • behavior — same API, different results; re-check tuned scripts.

Changes are grouped by impact in that order. If you just want to port your code, jump to the migration checklist at the end. Each commit hash links to its diff on GitHub.

Custom peripheral modules removed (major)

The early custom clock / file / gpio / led / select / socket / spi / wlan / uart modules were removed in favor of MicroPython’s built-in pyb / machine peripherals. Port scripts to the standard MicroPython equivalents (e.g. pyb.Pin / pyb.LED / pyb.SPI / pyb.UART).

Commits: 6d2fafa94

Imaging API moved into the image module (major)

Image(), HaarCascade(), and the descriptor save/load functions are no longer bare builtins — they live in the new image module. Scripts must import image and use image.Image / image.HaarCascade().

Commits: 54288c535

Frame-rate clock moved into time (major)

The standalone clock module was removed; the frame-rate clock now lives in time. Use import time and clock = time.clock() — the returned object still provides .tick() / .fps() / .avg() / .reset().

Commits: a8928ca3b

/flash and /sd no longer added to sys.path (behavior)

The volume labels / root directory were fixed and /flash and /sd are no longer auto-appended to sys.path. Scripts that imported helper modules by bare name from those locations must add the path explicitly (or place modules where they are found).

Commits: 09e77b5da

Migration checklist

For a clean port to v1.1.0 the typical work is:

  1. Replace the custom gpio / led / spi / uart / socket / wlan / file / select modules with MicroPython pyb / machine (the custom-module removal).

  2. import image and prefix Image() / HaarCascade() with image. (the image module move).

  3. Use import time and clock = time.clock() (the clock move).

  4. Add /flash / /sd to sys.path explicitly if you imported helper modules by bare name (the sys.path change).

All other scripts run unchanged.