How to enable and disable USB connection when using nrf52840 DK?

RE: How to enable and disable USB connection when using nrf52840 DK?

ovrebekk — Tue, 24 Mar 2020 09:22:45 GMT

Thanks for the update.

Yes, just open a new ticket if the issue is a bit on the side of the previous one. These cases get a bit hard to navigate if they cover multiple topics.

Best regards
Torbjørn

RE: How to enable and disable USB connection when using nrf52840 DK?

anusha — Mon, 23 Mar 2020 13:03:23 GMT

Hi Torbjørn,

Thanks for the example. I was able to dynamically enable/disable the USB using this example as a reference. One issue that I'm facing though is related to initializing SD card and writing to it after USB is disabled. I will try to debug this and if needed, will raise another question.

RE: How to enable and disable USB connection when using nrf52840 DK?

ovrebekk — Fri, 21 Feb 2020 16:05:15 GMT

Hi Anunsha

I finally found the example, but realized it was written for a really old version of the SDK (v12.2.0).

This was a training that showed how you could dynamically disable and enable the USB connection without requiring you to remove the USB cable.

I will attach it anyway in case you can find it useful.

devzone.nordicsemi.com/.../training_5F00_usbd_5F00_msc_5F00_cdc_5F00_01.zip

devzone.nordicsemi.com/.../training_5F00_usbd_5F00_msc_5F00_cdc_5F00_02.zip

devzone.nordicsemi.com/.../training_5F00_usbd_5F00_msc_5F00_cdc_5F00_02_5F00_solution.zip

Let me know if you can figure out the example, if not I will do my best to help next week.

Best regards
Torbjørn

RE: How to enable and disable USB connection when using nrf52840 DK?

anusha — Wed, 19 Feb 2020 04:54:03 GMT

Thanks, Torbjørn. Looking forward to your suggestion.

RE: How to enable and disable USB connection when using nrf52840 DK?

ovrebekk — Mon, 17 Feb 2020 15:56:04 GMT

Hi Anusha

I assume what you need is to disable the USBD driver so that you can freely access the SD card again?

I should have an old example somewhere showing how to do this, but I need some more time to find it. With some luck I can provide some code for you later in the week.

Best regards
Torbjørn