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AM62A7: CPU hang at a register access, after calling FFTLIB_Test_Init on C7

Part Number: AM62A7
Other Parts Discussed in Thread: FFTLIB

Tool/software:

Hello Team,

I appreciate your support. 

We managed to do NORTOS project with FFTLIB on C7. It works ok. However we wanted to add GPIO functionality, we can toggle it up until the point of cache initialization function of TI, afterwards it crashes. Please see further explanation and attachment, could you look into it please ? 

I created a C7x empty nortos project and imported the test  FFTLIB_fft1d_i32fc_c32fc_o32fc to my project. It can work normally. 
But when I want to control the GPIO (gpio0_41) in my project, the GPIO can only work before calling the FFTLIB_Test_Init function. The function GPIO_pinWriteHigh is called after FFTLIB_Test_Init makes the CPU stalled. Please refer to the attachment.
Could you please tell me the root cause here? What can I do to make the GPIO work with FFTLIB?"
Thank you in advance
Guy
ePiccolo Engineering