Add STM32H743 board support: DEV190806042, FK743M5-XIH6, STM32H7_CORE

[nuraci]

Depends on: lvgl/lv_binding_micropython#407

Summary

Add board definitions for three affordable STM32H743-based boards commonly
available on Aliexpress, featuring external SDRAM (16–32 MB), QSPI flash
(8–32 MB), USB, UART and RGB display output via the LTDC peripheral.

• DEV190806042 — 32 MB SDRAM (32-bit bus), 32 MB W25Q256 QSPI, no SD card
• FK743M5-XIH6 — 32 MB SDRAM (16-bit bus), 8 MB W25Q64 QSPI, SD card
• STM32H7_CORE — 32 MB SDRAM (16-bit bus), 16 MB W25Q128 QSPI, SD card,
  two hardware variants (V1.0 / V1.3) with different pin assignments

Each board provides: mpconfigboard.h, mpconfigboard.mk, board.json, pins.csv,
bdev.c (QSPI block device), stm32h743.ld (linker script with SDRAM section)
and stm32h7xx_hal_conf.h (with LTDC/DMA2D HAL modules enabled).

The STM32H7_CORE board uses the MicroPython variant system
(mpconfigvariant_V10.mk / mpconfigvariant_V13.mk) to handle the two
hardware revisions.

Test plan

• Build firmware for DEV190806042: make BOARD=DEV190806042
• Build firmware for FK743M5-XIH6: make BOARD=FK743M5-XIH6
• Build firmware for STM32H7_CORE V1.0: make BOARD=STM32H7_CORE BOARD_VARIANT=V10
• Build firmware for STM32H7_CORE V1.3: make BOARD=STM32H7_CORE BOARD_VARIANT=V13
• Flash and verify REPL via USB CDC on each board
• Verify QSPI filesystem is accessible and reports correct size
• Verify SD card mount on FK743M5-XIH6 and STM32H7_CORE
• Verify SDRAM heap is used (check gc.mem_free())

Boards docs, photos and videos

https://github.com/Copper-And-Code/stm32h7-boards-docs

micropython sample code and tools

https://github.com/Copper-And-Code/lv_micropython_code_and_tools

---

Summary by cubic

Adds board support for three STM32H743 boards with external SDRAM, QSPI flash storage, and LTDC RGB display output. USB CDC/MSD is enabled, SD is supported where present, and the heap is moved to SDRAM for more memory.

• New Features

  • Added DEV190806042, FK743M5-XIH6, and STM32H7_CORE (V1.0/V1.3) board definitions.
  • QSPI flash exposed as the filesystem via a cached block device; linker scripts add an SDRAM pool and place the heap in external SDRAM.
  • LTDC/DMA2D and optional touch I2C enabled for RGB panels; USB FS with dual CDC and MSC.
  • SD card enabled on FK743M5-XIH6 and STM32H7_CORE (V1.0 uses SDMMC2).

• Dependencies

  • Depends on lv_binding_micropython PR 407 for the st_ltdc driver and manifest.

^{Written for commit a763dc8. Summary will update on new commits.}

[cubic-dev-ai]

1 issue found across 26 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="ports/stm32/boards/DEV190806042/mpconfigboard.mk">

<violation number="1" location="ports/stm32/boards/DEV190806042/mpconfigboard.mk:16">
P2: DEV190806042 uses FK743M5-XIH6 linker script despite having its own stm32h743.ld; this can link against the wrong memory layout.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}