Keywords: OSDK onboard platform
OSDK 3.9：ARMv7/ARMv8/x86/DJI manifold2/STM32 F4 series.
OSDK 4.0：x86/STM32/armv8/ARMv7 series
For STM32 platform, OSDK 4.0 is only suitable for running on freeRTOS, and OSDK 3.9 is only suitable for running on bare board.
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