DFU SDK13 buttonless - DfuTarg appears for few seconds

[Mikhail]

I enter to bootloader via my app by UART command:

err_code = sd_power_gpregret_clr(0, 0xffffffff);
APP_ERROR_CHECK(err_code);
            
err_code = sd_power_gpregret_set(0, 0xB1);
APP_ERROR_CHECK(err_code);

sd_nvic_SystemReset();

After that I see DfuTarg. But after about 1 second, advertising disappear. I need again send UART command for advertise.

I suppose, this problem in the bootloader_secure_ble, which I use. How to repare it?

nordic_debug2.txt

[ketil]

Hi,

Your code looks correct. We will need more information in order to find a solution. Could you try running the debug version of the buttonless DFU example and look at the RTT output? It should tell you where the program fails.

Ketil

[Mikhail]

Hi! Thanks for answer. I'll try to do it and will write result.

[Mikhail]

additional info: I use

D:\...\examples\dfu\bootloader_secure_ble\pca10040\

bootloader.

In the my app via UART I send command like on first message.

I don't use buttonless DFU bootloader. I just use code for UART sending. What my next step?

[Mikhail]

I compile and flash version pca10040_debug. Same behavoir. I don't know how to catch it. may be I forgot to mention, but I merge and flash my app like Appendix 1. Advanced features in a devzone.nordicsemi.com/.../ link. Therefore I don't have any possibility to flash bootloader in debug mode via keil.

[ketil]

OK. See the Debugging with Real Time Terminal tutorial for information on how to see the output.