Open Bootloader PINRESET DFU

[LeoChen]

Hi,

When I enabled NRF_BL_DFU_ENTER_METHOD_PINRESET.

The 52840 Dongle into the DFU mode every time hardware power reset.

Use other DFU enters method does not have this problem.

I expected METHOD_PINRESET only into DFU mode after nRF connect DFU trigger.

How can I use METHOD_PINRESET and running the normal application after power reset?

[Simonr]

Hi Leo

I'm sorry, but can you please specify what you mean about nRFConnect DFU trigger? I'm afraid I don't understand what you mean about this. The NRF_BL_DFU_ENTER_METHOD_PINRESET will set the device in DFU mode on a pin reset. If you want it to go to DFU mode on a specific pin trigger, that should be possible as well.

Best regards,

Simon

[LeoChen]

Hi Simon,

Thanks for quick response.

I mean the Nordic DFU trigger library.

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.3.0%2Flib_dfu_trigger_usb.html&cp=5_1_3_5_3

The nRF connect log should like below.

2019-11-28T02:50:53.435Z INFO Using nrfjprog library 10.5.0, pc-nrfjprog-js 1.6.0
2019-11-28T02:50:53.484Z VERBOSE Could not fetch serial number for serial port at COM1
2019-11-28T02:50:53.484Z VERBOSE Could not fetch serial number for serial port at COM2
2019-11-28T02:50:56.206Z INFO DFU trigger interface found, changing to bootloader...
2019-11-28T02:50:56.931Z INFO Using USB SDFU protocol to communicate with target
2019-11-28T02:50:56.944Z INFO Protocol Version: 1 found
2019-11-28T02:50:56.946Z INFO Hardware: 52840 found
2019-11-28T02:50:56.951Z INFO Firmware: Bootloader found
2019-11-28T02:50:56.951Z INFO Firmware: SoftDevice found
2019-11-28T02:50:56.952Z INFO Firmware: Application found

Can I use nrfutil command to trigger DFU library, then programming the USB dongle?

I can only use nRF connect/programmer to trigger the DFU library right now.

[Simonr]

Hi Leo

Yes, you should be able to perform DFU using nrfutil. Please check out the BLE secure DFU Bootloader example where you can find a number of steps telling you how to perform a DFU using nrfutil or a mobile app.

Best regards,

Simon

[LeoChen]

Hi Simon,

I am asking a nrfutil command for the DFU trigger library(USB).

Not a nrfutil command for upgrade a chip already under DFU mode.

I can't see the document above mention any of DFU trigger library.

If you make sure the nrfutil command support DFU trigger library.

Would you please give me an example nrfutil command for the DFU trigger.

Leo

[Simonr]

Hi Leo

Sorry about the misunderstanding! I have forwarded this question to the developers in order to get a definitive answer on the matter, but as far as I can see it doesn't seem like there is such a command in nrfutil. You can check the GitHub repo yourself as well. It might take a few days to hear back from the devs, but I'll update you as soon as I get an answer.

Best regards,

Simon