NRF52840 USB stucks after while

[martin.richter.supervag]

Hi,

i am checking NRF52840 for USB behaviour. I'm using example usbd_cdc_acm. But USB receiving stucks after few bytes (between 0 and 50) and does not receives nothing more.

I corrected the buffer size as recommended in devzone.nordicsemi.com/.../

[Sigurd]

Hi,

Please provide some more information.

• What SDK version are you using?

• What version of the nRF52840 PDK are you using? It should be printed below PCA10056 on the sticker on the kit.

• Do you have more than 1 nRF52840-PDK you can test with?

• Do you have custom boards using "engineer samples" ?

If you are using engineer samples:

• How many of these custom boards with engineer samples do you have ?
• What is the build code on the engineer samples?

[martin.richter.supervag]

• nRF5_SDK_14.1.0_1dda907, no softdevice
• PCA 10056, V0.9.2, 2017.33, 683265658 bought by mouser.com
• a have only one pc of 52840 PDK
• no custom boards with "engineer sample".

Problem is not by sending the bytes to the computer, but with receiving bytes from the PC.

[Sigurd]

Hi,

From your description, I suspect it could be a issue with your nRF52840-PDK board. Please create a Mypage support case ticket regarding this issue, and we will find a solution for you. Remember to add the information about the board version in the MyPage ticket.