Expand stm32cube builder script to build CMSIS-RTOS2 component

[maxgerhardt]

Per https://community.platformio.org/t/cant-find-cmsis-rtos2-on-nucleo-l452re-with-stm32cube-framework/18713.

The current builder script only uses a few things from the Drivers/CMSIS folder of the STM32Cube package, namely "Device" and "DSP".

platform-ststm32/builder/frameworks/stm32cube.py

Lines 202 to 227 in a1e85ff

	CPPPATH=[
	"$PROJECT_SRC_DIR",
	"$PROJECT_INCLUDE_DIR",
	os.path.join(FRAMEWORK_DIR, "Drivers", "CMSIS", "DSP", "Include"),
	os.path.join(FRAMEWORK_DIR, "Drivers", "CMSIS", "Include"),
	os.path.join(
	FRAMEWORK_DIR,
	"Drivers",
	"CMSIS",
	"Device",
	"ST",
	MCU_FAMILY.upper() + "xx",
	"Include",
	),
	os.path.join(
	FRAMEWORK_DIR,
	"Drivers",
	MCU_FAMILY.upper() + "xx_HAL_Driver",
	"Inc",
	),
	os.path.join(
	FRAMEWORK_DIR,
	"Drivers",
	MCU_FAMILY.upper() + "xx_HAL_Driver",
	"Src",
	),

It would be nice to also configurably be able to build the other components in there, namely CMSIS-RTOS2 (I'm ignoring the older CMSIS-RTOS here) and maybe CMSIS-NN for neural networks.

[maxgerhardt]

Problem: The STM32Cube package doesn't contain the actual core code (RTX) from CMSIS-RTOS2!

Compare to https://github.com/ARM-software/CMSIS_5/tree/develop/CMSIS/RTOS2, the entire RTX folder is missing.

Is this due to licensing issues? Or does STMicroelectronics just doesn't deliver these files?

[tcaputi]

The code that STMCubeMx generates also doesn't include that. I think that it tries to use FreeRTOS for all of the internals. I believe all the code is there, its just not setup to build that code. I could be wrong though.

[valeros]

For some reason they don't include that files in the official STM32Cube packages (e.g. https://github.com/STMicroelectronics/STM32CubeF4/tree/master/Drivers/CMSIS/RTOS2) even though the RTX RTOS has a permissive license.