CC2564C: Hard fault - CC2564C, Bluetopia SDK, v4.2.1.0, ARM Cortex-M7, FreeRTOS v8.2.3

What sort of hard fault are you seeing? Since, you are using RTOS environment, please make sure there are no stack overflows.. If, you have a HW debugger attached, may be you want to single step through to the step causing the exception.

Thanks

Thank you for your reply.

I use CC256x STM32 Bluetopia SDK code example (with additional rework of USART). Thus, the memory settings are similar to the FreeRTOS example.  I increased the stack size and heap-memory to maximum, but the error occurs in the same place. I can't do the step-by-step debugging because it occurs in the library that I have no source code for. Could it be a problem that the library is compiled Cortex-M4?