Issue about DFU trigger library with secure_bootloader

[Hannibalhz]

Dear Nordic Engineers

I would like to use the DFU trigger library to realize the NRF CONNECT for Desktop enter bootloader.

I found a demo in devzone: https://devzone.nordicsemi.com/f/nordic-q-a/81194/trigger-library-does-not-work/336918 

I tested it on PCA10059 and it was very perfect.

Now I would like modify this demo to NRF52833 and use secure_bootloader, but I encounter some problems.

 So I first modify secure_bootloader to PCA10059.

I download secure_bootloader to PCA10059 and I connect PCA10059‘s USB to PC. I found 2 devices in my computer Device Management

But I can't use NRF CONNECT for Desktop to tigger enter bootloader.

 So I would like to know how to use DFU trigger with secure_bootloader.

Please give me some good suggestions.

Best ragards,

[Vidar Berg]

Hi,

Please compare the USB details for the composite device from Windows device manager for the working and non-working device. The driver requires the VID and PID to be the same. 

Best regards,

Vidar

[Hannibalhz]

Dear Vidar

The following picture is use the open_bootloader

The following picture is use the secure_bootloader

I think they don't have any different.

Could you give me some other good suggestions?

Best regards,

[Vidar Berg]

Hi,

The DFU trigger library should be integrated in the application code, not in the bootloader. From the pictures you posted, you can see that the interface number (MI_##) is different. These must match for the host driver to work.

Please try to initialize the DFU USB trigger first like I did in the example you referenced.