Application does not start after DFU update

RE: Application does not start after DFU update

MartinBL — Tue, 20 Feb 2018 10:03:42 GMT

Great! Thanks for sharing the solution.

RE: Application does not start after DFU update

Sourabh — Tue, 20 Feb 2018 09:59:49 GMT

Hi Martin,

I realized that the issue was with the clock configuration itself. Clock configuration from the the nrf drivers also needs to be changed to RC source. My application and bootloader are working fine now. Thanks for all the support.

RE: Application does not start after DFU update

MartinBL — Tue, 20 Feb 2018 08:38:00 GMT

Hi Sourabh,

Hung is out traveling. Have you made any progress the last week?

RE: Application does not start after DFU update

Sourabh — Tue, 13 Feb 2018 06:00:52 GMT

Hi Hung,

I tried toggling a GPIO pin and observing it on the CRO. The code seems to be stuck in the clock init because the nrf_drv_clock_lfclk_is_running always returns false.

So are there any other steps/workarounds to ensure that the the RC clock starts?

RE: Application does not start after DFU update

Hung Bui — Wed, 07 Feb 2018 06:44:22 GMT

I don't think there is extra step needed if you want to use the RC LF clock. Please try to add some code to toggle an LED and find where the code stopped. Or you can use the debug version of the bootloader and then enable logging.

RE: Application does not start after DFU update

Sourabh — Wed, 07 Feb 2018 05:16:31 GMT

I have changed the clock configurations to :

Still facing the same issue..

I also saw this thread, Should I make any changes to clock init code?

RE: Application does not start after DFU update

Hung Bui — Mon, 05 Feb 2018 12:39:41 GMT

Please try to debug using LED toggle or UART/RTT to see where it stuck inside the bootloader.

Please test with unmodified BLE or UART bootloader.

Note that if you don't have 32kHz crystal on the custom board, you need to configure the bootloader/application firmware to use RC LFCLK instead.

RE: Application does not start after DFU update

Sourabh — Mon, 05 Feb 2018 11:55:30 GMT

I also observe that after flashing the bootloader, if I cycle the power, bootloader does not start. It only starts after i connect it with the debugger.

RE: Application does not start after DFU update

Sourabh — Mon, 05 Feb 2018 09:27:57 GMT

Hi, I tested the same bootloader with blinky example on the nrf52 DK it is working as expected. I also tested the bootloader with a simple application as suggested with just led display on my custom board. I face the same issue, Application does not start automatically, I need to connect my debbuger for it to start. Should I change the boot0 pin configuration after update?

RE: Application does not start after DFU update

Hung Bui — Mon, 05 Feb 2018 07:56:33 GMT

Please try to test DFU with very simple application, such as blinking LED. This is to make sure if DFU works fine or not. Then you should find a way to debug your application without using the debugger, for example toggle LED and print on UART. I suspect something wrong with the fact that the bootloader may use some peripherals and if in the application those peripheral are not initialized properly it will cause issue.

RE: Application does not start after DFU update

Sourabh — Mon, 05 Feb 2018 03:52:27 GMT

I observe that the bootloader works only when I've connected my board to the debugger, after the dfu update the application does not start, but when I go to nrf go studio and connect and disconnect my device the application starts!

RE: Application does not start after DFU update

Hung Bui — Fri, 02 Feb 2018 14:27:35 GMT

So actually the application started? You need to debug the application and see where it crashes. Debug it as normal, just start debugging and then let the bootloader running you should get to application's main after the bootloader starts and switch to application.

RE: Application does not start after DFU update

Sourabh — Wed, 31 Jan 2018 11:17:36 GMT

I generate a dfu package using the nrfutil, I observe that the application starts but stops after few seconds.

RE: Application does not start after DFU update

shibshab — Tue, 30 Jan 2018 14:24:12 GMT

Have you loaded the bootloader settings page generated for that specific application?

nrfutil pkg generate something somethnig my_settings.hex

and then you flash that hex file before doing the application update.

RE: Application does not start after DFU update

Sourabh — Tue, 30 Jan 2018 13:40:12 GMT

I’m not updating the softdevice. I just update my application. Initially I flash s132 v5.0.0 then flash my bootloader. I then try to load my application using serial DFU. I get programmed 100% but application does not start.

RE: Application does not start after DFU update

shibshab — Tue, 30 Jan 2018 13:36:08 GMT

There is a known issue with sdk 14.0.0 where performing DFU which contains a softdevice of different size than the old one will not work. Is this the case?