SEGGER RTT printf not printing all the lines.

Question

I want to read whole flash memory using for loop and see how long it takes. What i have noticed is that it does not print all the lines. On the other side i ask myself: Does it read all the lines? 
 I read the memory as suggested in this post devzone.nordicsemi.com/.../

SEGGER - Johannes · Accepted Answer

Hi, 
 It could be possible that you print the data "too fast".
This means you write to the RTT buffer faster than the J-Link reads and empties the buffer.
When the buffer is full, the default configuration is to discard new data. 
 There are three approaches to avoid this: 
 
 Use an external J-Link (PRO/ULTRA+) which might read the buffer faster 
 Use a larger RTT buffer (increase BUFFER_SIZE_UP in SEGGER_RTT_Conf.h) 
 Use RTT in blocking mode (define SEGGER_RTT_MODE_DEFAULT as SEGGER_RTT_MODE_BLOCK_IF_FIFO_FULL) 
 
 Please note that with the third approach your application will be blocked and does not run if no J-Link/Debugger is attached. 
 Regards
Johannes

SEGGER RTT printf not printing all the lines.

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