error when activating “Softdevice” with “USB CDC ACM”

[Omar]

i'm using this dongle USB840F  based on nRF52480.

i'm using usbd_ble_uart_freertos (SDK 15.2) example, the usb port is detected and i can read from it , but it doesn't advertise , when i debug it an error is appears when actiniting softdevice (in function nrf_sdh_enable_request())

PS i tested the same code in nRF52840 dk and it works great ( ble and usb ) 

thanks

[Jørgen Holmefjord]

Hi,

Please have a look at the first line of USB840F User Manual:

Important: The USB840F doesn’t include 32K crystal.
Therefore, please make sure the clock is set to internal RC before programming your firmware.

This can be done by changing configs in your sdk_config.h file, as suggested in this post.

 Best regards,
Jørgen