Error 10 on DFU

[AmiguelS]

I'm using S132 (SDK 12.3) and I'm trying to perform DFU over the air. The procedure I am using with this device (and failing) is being used on other devices an succeeding.

Using the Android Nordic DFU service, I get the log found here. The most relevant part is the following:

09-18 15:19:56.033 21651-21651/com.some.app D/someService: Thread: main
                                                                    ED:5C:7E:C3:7C:05 [0]: [DFU] gatt.writeCharacteristic(8ec90001-f315-4f60-9fb8-838830daea50)
09-18 15:19:56.078 21651-6746/com.some.app E/DfuImpl: Executing object failed (error 10)
09-18 15:19:56.078 21651-6746/com.some.app D/BluetoothGatt: cancelOpen() - device: ED:5C:7E:C3:7C:05
09-18 15:19:56.083 21651-21668/com.some.app D/BluetoothGatt: onClientConnectionState() - status=0 clientIf=5 device=ED:5C:7E:C3:7C:05
09-18 15:19:56.084 21651-21651/com.some.app D/someService: Thread: main
                                                                    ED:5C:7E:C3:7C:05 [5]: [DFU] Data written to 8ec90001-f315-4f60-9fb8-838830daea50, value (0x): 04
09-18 15:19:56.084 21651-21651/com.some.app D/someService: Thread: main
                                                                    ED:5C:7E:C3:7C:05 [5]: [DFU] Notification received from 8ec90001-f315-4f60-9fb8-838830daea50, value (0x): 60-04-0A
09-18 15:19:56.084 21651-21651/com.some.app D/someService: Thread: main
                                                                    ED:5C:7E:C3:7C:05 [20]: [DFU] Remote DFU error: REMOTE DFU OPERATION FAILED
09-18 15:19:56.084 21651-21651/com.some.app D/someService: Thread: main
                                                                    ED:5C:7E:C3:7C:05 [1]: [DFU] Disconnecting...
09-18 15:19:56.084 21651-21651/com.some.app D/someService: Thread: main
                                                                    ED:5C:7E:C3:7C:05 [0]: [DFU] gatt.disconnect()
09-18 15:19:56.084 21651-21651/com.some.app D/someService: Thread: main
                                                                    ED:5C:7E:C3:7C:05 [5]: [DFU] Disconnected

Here, the service fails to perform the DFU and reports error 10.

My biggest question is why is this happening with only this device. But to start, I'd like to know where can I find an error list, so I can know what error 10 is and go from there.

Thanks!

[bjorn-spockeli]

Are all the devices are identical in terms of both HW and FW? Looking at the log, it would appear that the DFU target fails to execute the last object it received,indicated by the 60-04-0A response, which was a command object containing the init packet . Could you run the bootloader on the nRF52 on in a debug session and set breakpoints at thereturn NRF_DFU_RES_CODE_OPERATION_FAILED statements in the dfu_handle_prevalidate() function in dfu_req_handling.c to identify which check that failes?

[AmiguelS]

All devices are identical, both in HW and FW. Would this require re-flashing the bootloader? I'm asking because I know that by doing so this problem would disappear, and I'd be unable to find out the cause after.

[bjorn-spockeli]

No, running the bootloader in a debug session should not require you to reflash the bootloader. However, you should be able to prevent Keil from flashing the bootloader by going to Options for Target --> Debug --> Settings -- Flash Download and setting the Download Function to Do not Erase.

[AmiguelS]

I do not have access to Keil, I use Eclipse to develop. Pardon me, but how should I proceed to start the debug session you mentioned? When I have used Eclipse for debugging, it required me to re-flash the FW.

[bjorn-spockeli]

I assume that there is an option to not reload the FW when you start the debug session? Alternatively you can use the Segger Ozone Debugger, downloadable from here.