v1.3.2

modules.cpp v1.3.2

Something to capture and keep. v1.3.1 added USB connectivity; v1.3.2 gives
programs a portable file system with littlefs and FAT on Pico, SD-card and
SPI-flash drivers with Linux emulation, addressable RGB LEDs, and live
HM01B0 camera preview on PICO-Cam-A. New Waveshare board profiles, standalone
UF2 flashing, and USB console fixes complete the release.

./build.sh
./test.sh
./scripts/build-pico.sh --board pico_cam_a --app camera-demo --dry-run
./scripts/build-rgb-led.sh --board rp2040_zero --dry-run
./scripts/build-fs.sh --board generic --dry-run

mm.fs adds allocation-free paths, mounts, files and directories, with
move-only handles and a reusable 25-check volume contract. Pico applications
can mount littlefs on reserved program-flash storage, or FAT12/16/32 on block
devices. Linux mounts ordinary directories through mm.fs.local and
mm.fs.native. mm.sdcard drives SD cards in SPI mode, board socket
providers supply wiring, and mm.spiflash drives W25Q-family NOR flash.
The storage-linux profiles emulate both chips in persistent image files,
with CRC checks and fault injection for host-side driver tests.

mm.led and mm.led.ws2812b provide addressable RGB LEDs over the new
mm.mcu pulse facility. Waveshare RP2040/RP2350 Zero profiles bind the
onboard WS2812B; GEEK profiles bind their LCDs and SD sockets; RP2350-PiZero
profiles select the RP2350B SDK header and offer a USB-host variant.
These new LED and storage board paths are not yet qualified on hardware.

PICO-Cam-A binds an HM01B0 camera and a 240x135 ST7789V LCD. camera-demo
starts live capture in CROP after reset, with K3 stop/restart and K4 cycling
crop, nearest, area and temporal sampling. mm.camera.preview implements
processing and debounce as C++20 module code; the display receives complete
RGB565 frames. Sensor settings and initialization delays follow Waveshare's
working C demo. Camera support adapts ArduCAM/RPI-Pico-Cam through Waveshare;
original attribution and local changes are recorded in
boards/pico_cam_a/mm.mdy. Basic preview has been confirmed on the board.
The 250 MHz capture clock exceeds the RP2040's documented 200 MHz operating
point. Frame rate and image quality are not formally qualified.

flash --image <file.uf2> installs independently built firmware through the
existing Pico backend, including --auto-flash. USB console connection and
flush behavior now handle terminals without DTR, deconfiguration, debugger
halts and disconnected hosts with bounded waits. scripts/install-linux-deps.sh
provides an Ubuntu/Debian dependency installer.

Source manifests mm: 1.0, 1.1, 1.2 and 1.3 remain supported; the
persisted configuration schema is unchanged. Linux littlefs/FAT providers,
4-bit SDIO, file commands in the shell, and manifest version 1.4 remain
unreleased development work on main.

Requires a C++20 compiler with module support (GCC 15 recommended), a POSIX
shell, and the development libraries required by the selected hosted
providers. Pico builds require an Arm or RISC-V toolchain, the Pico SDK and
picotool; vendored littlefs and FatFs are provisioned by their vendor scripts.

See CHANGELOG.md, docs/modules-fs.mdy,
docs/modules-sdcard.mdy, docs/modules-spiflash.mdy,
docs/modules-linux-storage.mdy, docs/modules-led.mdy,
docs/modules-pico-cam-a.mdy, docs/modules-stdio.mdy, and
docs/modules-flash.mdy for the released behavior and its limits.