Application does not start after DFU

RE: Application does not start after DFU

Vidar Berg — Thu, 29 Sep 2022 13:33:39 GMT

Lets continue the discussion in this thread: nRF52820 softdevice DFU

RE: Application does not start after DFU

Louis_263 — Wed, 28 Sep 2022 13:04:43 GMT

Hi Sigurd,

Unfortunately, I don't think this case will help me.

Louis

RE: Application does not start after DFU

Sigurd Hellesvik — Wed, 28 Sep 2022 11:12:03 GMT

Hi Louis,

I found another similar case to this: nRF2810 UART ERROR 1 with DFU

Are you able to find any clues in this case?

Regards,
Sigurd Hellesvik

RE: Application does not start after DFU

Louis_263 — Wed, 28 Sep 2022 09:25:08 GMT

Hi,

I have a custom application in which I perform the DFU via a second microcontroller that receives the packets via TCP and forwards them via UART to the nRF52. The UART is configured to 115200 baud and does not use HWFC.... I think an equivalent command would therefore be

nrfutil dfu serial -pkg app_dfu_package.zip -p COMx -b 115200 -fc 0

I have found that after successful DFU, a UART error occurs as confirmed by the log attached in the post (in nrf_dfu_serial_uart line 150). The error handler then causes a system reset. Since the bootloader settings were not completely flashed beforehand, the application will probably not be able to be called from the bootloader. If I comment out the error handler, then everything seems to work as it should.

I get the UART error code 1, do you know what this means?

Louis

RE: Application does not start after DFU

Sigurd Hellesvik — Wed, 28 Sep 2022 09:02:23 GMT

Hi,

Can you post the commands you use to perform the DFU?

Regards,
Sigurd Hellesvik