SEGGER_RTT_WaitKey() function

SEGGER_RTT_WaitKey Function description Waits until at least one character is avaible in the SEGGER RTT buffer. Once a character is available, it is read and this function returns. Return value >=0 - Character which has been read. Notes (1) This function is only specified for accesses to RTT buffer 0 (2) This function is blocking if no character is present in RTT buffer