Previously I did not sleep and hardware flow control, I was sending wireless data.
But now I can not do it.
If I connect with BLE, the connection i will be broken.
In addition, the program stops with the following code.
hardfault_handler.c
L.125
__asm("BKPT #0\n");

I have not changed from the source code which was used before.
I do not know the cause.
please help me

thank you dialog in advance.