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ARM: RTX Critical Sections (6 Replies)

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Hi, I am trying to port a library that is working with FreeRTOS to RTX. The microcontroller is the same: STM32F4. The library uses critical sections. I have tried using the same implementation for the critical section for RTX as for FreeRTOS(BASEPRI) but I often end up in UsageFault. I know that RTX uses extensively the SVC in the code. Could it be that the Critical sections should be implemented differently ? Do you know of any other differences between FreeRTOS and RTX that

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