How is it possible that my app doesn't start unless I start a debug?

Question

I am playing with example app from this tutorial devzone.nordicsemi.com/.../ 
I can see the app only when I start debugging. If I just power up my custom board, it doesn't show the app in my smartphone. What do I explain such behavior? (Probably, some settings in Segger, but I can't understand, which exactly). 
 UPD. Could it be so that it's working in debug mode because of delays, introduced by debugger? And the absense of these delays renders in a non-working application during normal run?
UPD2. I soldered on an LED to pin10 (UART config and init is commented out in my code, at least in main.c), and during debug mode my characeristic shows up simultaneousy with me LED on pin 10 (which is actually not expected).
I traced it down to ble_advertising.c, line 373, 
 m_evt_handler(m_adv_evt);
 
 where m_adv_evt is BLE_ADV_EVT_FAST.
but I can't find, what is inside that call, and my LED seems to turn on after this line.

puff · Accepted Answer

I think the problem was (is) that I used Segger and there were printf in my code without uart_init(). In debug mode it was somehow retargeted to Segger console, without any errors, but when run in normal mode, it required uart_init().

How is it possible that my app doesn't start unless I start a debug?

Top Replies