Default interrupt handler called on USBD power event

[yarona]

Hi

I am developing a bootloader for nRF52840 using SDK 15.2.0 and s140_nrf52_6.1.0_softdevice, that should support both USBD and BLE transports.

The first transport layer initiated inside 'nrf_dfu_transports_init' is the USBD ('usb_dfu_transport_init').

Inside 'app_usbd_power_events_enable'  the interrupt handler is set to be 'app_usbd_power_event_handler', and than USB power events are enabled ('nrfx_power_usbevt_enable').

The problem is that is I have a USBD event pending when I enable USB events  the Default_Handler is called instead of 'app_usbd_power_event_handler'.

However, if I have a USB power event after the second transport layer is initiated ('ble_dfu_transport_init') , than the correct interrupt handler is called ('app_usbd_power_event_handler').

Am I doing something wrong?

Thanks,

Yaron

[Simonr]

Hi Yaron

Is your APP_USBD_CONFIG_POWER_EVENTS_PROCESS enabled in your project?

We saw a similar problem some time ago, where the workaround ended up being to use the gcc compiler instead of Keil, which showed this issue. Please try the attached project in the armgcc folder. It should use default keys placed in SDK15.2\examples\dfu 

pca10056_ble_and_uart.zip

Best regards,

Simon