USB Examples on nRF52 Dongle

[pcc]

Hello! I'm following the nRF52 Dongle programming guide to adapt the USB examples from SDK 15.3.0 to the nRF52840 Dongle. USB CDC ACM works fine, and I managed to get half of the MSC example to work. But the HID examples don't seem to work. The application is built correctly and I can write the HEX file to the dongle, but the board doesn't seem to work at all (e.g. toggling a led in the main function doesn't do anything, device not recognized in computer as usb). Is there any explanation for this behavior?

Thanks in advance!

[Simon]

I was able to make the HID Mouse Application work on the nRF52850 Dongle, I did this:

• Opened the ble_app_hids_mouse_pca10056_s140 example in SES
• Changed the preprocessor definition BOARD_PCA_10056 to BOARD_PCA10059 as described in the nRF52840 Dongle tutorial
• Dragged the application (examples\ble_peripheral\ble_app_hids_mouse\pca10056\s140\ses\Output\Release\Exe\ble_app_hids_mouse_pca10056_s140.hex) and the S140 SoftDevice (components\softdevice\s140\hex\s140_nrf52_6.1.1_softdevice.hex) into the File Memory Layout window in the nRF Connect Desktop Programmer app
• Opened nRF Connect mobile app, and was able to locate and connect to nRF5_Mouse

Try following these exact steps, and if it still doesn't work. please tell me and I will look further into it.

Best regards,

Simon

[pcc]

Thank you for your response! Sorry for not being specific enough, I meant the hardware peripheral examples under examples/peripheral/usbd_hid_generic and examples/peripheral/usbd_hid_composite. I am not using Softdevice.

[Simon]

I am sorry for the long delay. Have you been able to figure it out, or should I look into it?

Regards,

Simon

[pcc]

Hi again! No, sorry, I still couldn't figure out why it's not working.

[Simon]

I am sorry for the long delay. A huge portion of the support team are on vacation, which causes delayed responses.

The reason the usbd_hid_generic example doesnt work on the dongle is because the error check inside INIT_BSP_ASSIGN_RELEASE_ACTION triggers. 

Inside bsp_event_to_button_action_assign() there is the following check:

if (button < BUTTONS_NUMBER){
        .
        .
        .
    } else
    {
        err_code = NRF_ERROR_INVALID_PARAM;
    }

When you are providing it with BTN_MOUSE_LEFT (=2), which is bigger than BUTTONS_NUMBER (=1), the function will return an error and the program will stop running.

Best regards,

Simon