PCA10056 USB CDC Demo, no polling

RE: PCA10056 USB CDC Demo, no polling

ubieda — Fri, 15 May 2020 13:17:21 GMT

Hey, there. I don't know if I'm years late or not. I was looking at USB CDC example and got it working per the infocenter statement:

"This may be done inside USB power event handler. USBD library should be enabled on NRF_DRV_POWER_USB_EVT_DETECTED and started on NRF_DRV_POWER_USB_EVT_READY."

What I had to do is to go on the project sdk_config.h and set APP_USBD_CONFIG_SOF_HANDLING_MODE to 2 (events are handled within interrupt context). Also, set APP_USBD_CONFIG_EVENT_QUEUE_ENABLE to 0.

I hope it is of any help to someone wondering the same when looking at USB ACM example.

Best regards,
LuisF

RE: PCA10056 USB CDC Demo, no polling

Jørgen Holmefjord — Wed, 06 Feb 2019 15:35:42 GMT

Did you connect the USB cable to the nRF52840 USB port (J16 on the NINA-B301 EVK)?

RE: PCA10056 USB CDC Demo, no polling

ratnakar1978 — Sat, 02 Feb 2019 06:33:47 GMT

Hi Jorgen,

I am using NINA-B301 EVK having nRF52480 core chipset. I am trying to flash all USB, UART examples to see the log or print on the putty prompt but I am not able to see any log even after setting all configurations on putty.

http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.0.0%2Flib_cli.html&anchor=lib_cli_terminal_settings

I had checked in the forum that need to enable DTR but did not observe the same in any USBD, UART related applications.

I tried following applications

USB CDC ACM

USB MSC

Temeprature

USBD

USBD UART

But I am not able to see any print / log on putty prompt.

Can you suggest anything in this.

RE: PCA10056 USB CDC Demo, no polling

Jørgen Holmefjord — Wed, 24 Jan 2018 09:04:26 GMT

Hi,

Did you change usbd_config struct passed to app_usbd_init()? I tried to apply your changes to the USBD CDC ACM example, but got a hardfault in app_usbd_event_add(), most likely because ev_handler is not set in the config struct. Passing NULL to app_usbd_init() seems to fix the issue. The app_usbd library will then use the default internal event handler, but you can also provide your own in the config struct.

Best regards,

Jørgen