nrf52840 stops working in USB CDC ACM example

[pcc]

Hi,

I'm trying to run the usbd_cdc_acm example from SDK 15.3.0 on the nRF52840 Preview DK. While debugging, the code was running fine until I connect the nRF USB, at this point it keeps running for some short time and then the code just gets stuck on the function nrfx_systick_delay_ticks because the internal clock seems to have stopped working (the function nrf_systick_val_get only returns 0 at that point). Before the program gets stuck, the board never pops up as a USB device either.

I'm using Segger Embedded Studio. Also, nrfx_usbd_errata_187() returns false.

Thanks in advance!

[Kenneth]

Hi,

Order a new nRF52840 DK. The preview kits contains early engineering samples before the chip was qualified and put to production.

Best regards,
Kenneth

[pcc]

Alright, thanks!

[smanand1234]

Hi I've a nrf52840 DK and SDK 15.3.0. I'm using USB CDC ACM example. When I use Windows 7 to connect to the USB port, it kind of detects the device, but the device manager shows Yellow mark, telling me the device is not properly installed. Has anyone tried SDK 15.3.0 with the DK? Any suggestions on the example project?