first DFU test failed to pre-validate

RE: first DFU test failed to pre-validate

bjorn-spockeli — Tue, 24 Oct 2017 13:45:02 GMT

can you post the nrfutil command you used to generate the zip?

RE: first DFU test failed to pre-validate

paul_tanner — Tue, 24 Oct 2017 12:01:36 GMT

Thx @Bjørn I have now generated a new key pair and image but after loading it did not start. (I looked for a sample image in the 12.3 SDK but did not find it.)

Restarted DFU and selected my new image .zip. The final lines of debug were:

...
:INFO:Enter nrf_dfu_app_is_valid
:INFO:Return true. App was valid
:INFO:Enter nrf_dfu_app_is_valid
:INFO:Return true. App was valid
:INFO:Jumping to: 0x0001f000
:INFO:Running nrf_bootloader_app_start with address: 0x0001f000
:INFO:Disabling interrupts
:INFO:Setting SD vector table base: 0x0001f000

After this it hung, presumably waiting for another DFU. The reset button did not start the downloaded app. I was able to start it with J-Link so the loading worked. However, I had been expecting the downloaded app to start automatically.

Is there something missing from the zipped image?

RE: first DFU test failed to pre-validate

bjorn-spockeli — Tue, 24 Oct 2017 11:02:20 GMT

Hi Paul,

each SDK version will use different public-private key pairs, so you will not be able to perform a DFU with the bootloader from SDK v12.3.0 using a test image from SDK v12.2.0.

You have to use the test images from the same SDK version or generate your firmware image with your own public-private key pair, see this guide.

RE: first DFU test failed to pre-validate

paul_tanner — Mon, 23 Oct 2017 17:30:15 GMT

Tried again after generating a new package.zip

nrfutil pkg generate --debug-mode --application _build/nrf52832_xxaa.hex --key-file ../../../keys/priv.pem myapp_dfu_package.zip

different results but the DFU failed:

:INFO:Inside main of bootloader_secure
:INFO:In nrf_bootloader_init
:INFO:In real nrf_dfu_init
:INFO:running nrf_dfu_settings_init
:INFO:!!!!!!!!!!!!!!! Resetting bootloader settings !!!!!!!!!!!
:INFO:Erasing old settings at: 0x0007f000
:INFO:Erasing: 0x0007f000, num: 1
:INFO:Writing 0x00000057 words
:INFO:Writing settings...
:INFO:Enter nrf_dfu_continue
:INFO:Single: Invalid bank
:INFO:Enter nrf_dfu_app_is_valid
:INFO:Return false in valid app check
:INFO:In nrf_dfu_transports_init
:INFO:Inside main of bootloader_secure
:INFO:In nrf_bootloader_init
:INFO:In real nrf_dfu_init
:INFO:running nrf_dfu_settings_init
:INFO:Enter nrf_dfu_continue
:INFO:Single: Invalid bank
:INFO:Enter nrf_dfu_app_is_valid
:INFO:Return false in valid app check
:INFO:In nrf_dfu_transports_init
:INFO:num transports: 1
:INFO:vector table: 0x00075000
SDH:WARNING:sd_ble_enable: RAM start should be adjusted to 0x20002798
SDH:WARNING:RAM size should be adjusted to 0xd868 
:INFO:After nrf_dfu_transports_init
:INFO:------- nrf_dfu_flash_init-------
:INFO:Waiting for events

So I still have warnings that I don't know how to fix. Then I try the DFU:

:INFO:Received select object
:INFO:Valid Command: NRF_DFU_OBJECT_OP_SELECT
:INFO:Sending Object Info: [0x60, 0x06, 0x01 max: 0:x00000100 0:x00000000, CRC:0x00000000]
:INFO:Set receipt notif
:INFO:Sending Response: [0x2, 0x1]
:INFO:Received create object
:INFO:Before OP create command
:INFO:Valid Command Create
:INFO:Sending Response: [0x1, 0x1]
:INFO:Before OP write command
:INFO:Before OP write command
:INFO:Before OP write command
:INFO:Before OP write command
:INFO:Before OP write command
:INFO:Before OP write command
:INFO:Before OP write command
:INFO:Before OP write command
:INFO:Received calculate CRC
:INFO:Valid Command CRC
:INFO:Sending CRC: [0x60, 0x03, 0x01, 0:x00000090, CRC:0x0841078f]
:INFO:Received execute object
:INFO:Before OP execute command
:INFO:Valid command execute
:INFO:
12 8D 01 0A 47 08 01 12 43 08 FF FF FF FF 0F 10  ....G...C.......
FF FF FF FF 0F 1A 03 FE FF 03 20 00 28 00 30 00  .......... .(.0.
38 D0 BD 01 42 24 08 03 12 20 C2 8A 2A C6 60 8E  8...B$... ..*.`.
87 8F 49 3D 26 E0 8F B9 E6 AB 61 B7 17 99 22 C7  ..I=&.....a...".
97 39 73 4D D0 24 7A 5D 32 1A 48 01 10 00 1A 40  .9sM.$z]2.H....@
D4 E1 40 93 2F A1 90 93 27 D3 40 E4 AE 8E 82 69  ..@./...'.@....i
:INFO:
:INFO:Prevalidate FAILED!
:INFO:Sending Response: [0x4, 0x5]

So the end result is the same.