Add support for APM32F072

[rhgndf]

The SDK is at https://global.geehy.com/uploads/tool/APM32F0xx_SDK_V1.8.6.zip, no git repo available for get_deps.py as far as I can tell apart from an old version at https://github.com/GeehySemi/APM32F072-USB-TSC-MOUSE/tree/master

[github-actions]

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[Copilot]

Pull request overview

Adds TinyUSB device-controller support for the Geehy APM32F072 MCU, which uses the same FSDEV USB IP as STM32 parts. A new BSP family for the APM32F072 development board is introduced and the FSDEV port is extended with an APM32 variant header.

Changes:

• New OPT_MCU_APM32F0XX option and FSDEV variant wiring (TUP_USBIP_FSDEV_APM32, fsdev_apm32.h selecting USBD_BASE/USBD_IRQn, 1KB PMA).
• New hw/bsp/apm32f0xx family (CMake + Make builds, family.c board init using HSI48 + CRS, board files for apm32f072_dev_board).
• Documentation/board listing updates in README.rst and docs/reference/boards.rst.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/tusb_option.h	Defines OPT_MCU_APM32F0XX (2700) under Geehy.
src/common/tusb_mcu.h	Maps APM32F0XX to FSDEV with APM32 variant and 1KB PMA.
src/portable/st/stm32_fsdev/fsdev_common.h	Includes new fsdev_apm32.h when TUP_USBIP_FSDEV_APM32 is set.
src/portable/st/stm32_fsdev/fsdev_apm32.h	New APM32 FSDEV variant: IRQ list, int enable/disable, connect/disconnect.
hw/bsp/apm32f0xx/family.mk	Make build for APM32F0xx family using Geehy SDK.
hw/bsp/apm32f0xx/family.cmake	CMake build for APM32F0xx family.
hw/bsp/apm32f0xx/family.c	Clocks, LED, UART stubs, UID, IRQ forwarding for the family.
hw/bsp/apm32f0xx/boards/apm32f072_dev_board/board.{h,mk,cmake}	Board definitions for APM32F072 dev board.
README.rst	Adds Geehy APM32 F072 row to supported CPU list.
docs/reference/boards.rst	Adds Geehy/APM32F072 dev board entry.

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[HiFiPhile]

Hi, which board is it ? I can only find https://global.geehy.com/design/hardware_detail/49

[rhgndf]

It's an unnamed board which looks like this:

Product listing picture:

Anyway I got this a while back and currently isn't that interesting anymore since it is no longer the lowest cost mcu with usb dfu/isp and gcc/clang support available on jlcpcb.