Serial DFU tool

[Brian]

I have a nrf51-DK, SDK 9.0, S110, dual-bank bootloader that supports both serial and ble protocols, developed using GCC/Eclipse. I'm able to flash my app/bootloader/softdevice using JLink through Eclipse as well as update my app via OTA. Now I need to be able to update the app via serial reflash. I use nRF Toolbox to do the OTA. Is there a similar app capable of performing serial reflash of my app? I see the format of the data and the handshake back and forth described here - infocenter.nordicsemi.com/index.jsp. Is there a tool/script available that implements this, or do I need to write this myself?

UPDATE: It looks like nrfutil is the program I need to do a serial reflash of my app. However, I'm having issues getting it to work. Here is what I'm sending:

nrfutil.exe dfu serial --package C:\Firmware\strobe\build\obj_strobe\strobe.zip --port 11 --flowcontrol --baudrate 38400

And here is what I get back:

Upgrading target on 11 with DFU package C:\Firmware\strobe\build\obj_strobe\stro be.zip. Flow control is enabled. [------------------------------------] 0%

Failed to upgrade target. Error is: Serial port could not be opened on 11. Reaso n: could not open port u'11': WindowsError(2, 'The system cannot find the file s pecified.')

Possible causes:

• bootloader, SoftDevice or application on target does not match the requirement s in the DFU package.
• baud rate or flow control is not the same as in the target bootloader.
• target is not in DFU mode. If using the SDK examples, press Button 4 and RESET and release both to enter DFU mode.

C:\Program Files (x86)\Nordic Semiconductor\nRFgo Studio>

I have first put by dev kit into serial bootloader mode upon reset - I have LED3 lit.

From Windows Device Manager, I can see that Com11 is the correct port:

The package file, strobe.zip, is the same file I use to program the device OTA, which works correctly. I generated it using the following: "c:\Program Files (x86)\Nordic Semiconductor\nRFgo Studio"nrfutil dfu genpkg strobe.zip --application strobe.hex --application-version 0xffff --dev-revision 0xffff --dev-type 0xffff --sd-req 0xfffe

Any ideas what I might be doing wrong? Thanks!

[inghowe83]

Thanks. I have tried nrfutil too and I received the following error. Tested with 115200 baud rate too.

[inghowe83]

Hi @Vidar Berg

Tested using usb_serial. Not working as well.

By the way I follow the step from the following blog, is the step still valid?

devzone.nordicsemi.com/.../getting-started-with-nordics-secure-dfu-bootloader

I managed to progress until "Step D. Test DFU"

[Vidar Berg]

Ing Howe, the bootloader support different transport layers. We currently have support for over the air DFU over BLE, or serial DFU over UART and USB for the 52840. So the steps to do DFU depends on which bootloader you have programmed on your chip.

Recommend to go through the following documentation to get an overview of our DFU implementation:

•  Bootloader examples
•  Bootloader Modules

Also, suggest that you create a new thread for this since it's unrelated to the problem OP had. 

 

[Somesh Burkule]

Hi inghowe83,

is it resolved?

I think you need to check hardware flow control and also data over Tx and Rx line.

are you using secure bootloader example? what changes you made in sdkconfig?

[inghowe83]

Oh no. I didn't proceed with this method, I use ble to perform dfu directly.