nRF52840 not debugging from Keil after DFU

RE: nRF52840 not debugging from Keil after DFU

Amanda Hsieh — Mon, 25 Nov 2019 09:30:15 GMT

Hi Ben,

Could RTT log work before the application modified?

[quote user="nordic_fan2015"]How do I get this log?[/quote]

You could use the bootloader_secure_ble_debug image under <nRF5_SDK>\examples\dfu\secure_dfu_test_images\ble\nrf52840

In the application project, you could enable RTT log in the sdk_configh.h as

//==========================================================
// <e> NRF_LOG_BACKEND_RTT_ENABLED - nrf_log_backend_rtt - Log RTT backend
//==========================================================
#ifndef NRF_LOG_BACKEND_RTT_ENABLED
#define NRF_LOG_BACKEND_RTT_ENABLED 1
#endif

-Amanda H.

RE: nRF52840 not debugging from Keil after DFU

RPDben — Mon, 25 Nov 2019 08:50:39 GMT

Hi Amanda,

[quote userid="77782" url="~/f/nordic-q-a/54744/nrf52840-not-debugging-from-keil-after-dfu/221747"]What is the updated application different from the previous? Is a new service added to the application?[/quote]

No, the only difference is some different RTT Viewer printf's to distinguish between the two.

[quote userid="77782" url="~/f/nordic-q-a/54744/nrf52840-not-debugging-from-keil-after-dfu/221747"] Could you provide the log?[/quote]

How do I get this log? I can tell it is in the bootloader because I have a certain LED pattern in the bootloader that is not in my main application.

Thanks,

Ben

RE: nRF52840 not debugging from Keil after DFU

Amanda Hsieh — Mon, 25 Nov 2019 08:13:23 GMT

Hi,

[quote user=""]if I then program an updated application[/quote]

What is the updated application different from the previous? Is a new service added to the application?

[quote user=""]the MCU jumps straight to the bootloader after programming and will not run the new application. [/quote]

Could you provide the log?

-Amanda H.