Getting start with USB

[Unia Kuo]

Hi all,

I would like to learn how to use the USB peripheral these days. So, I programmed the example of usbd_cdc_acm on PCA10056. The PCA10056 couldn't be identified after replugging the USB cable from J2 to J3. I have also confirmed that the USB driver is already installed. But it shows an message "Device descriptor request failed" in the Device manager.

How do I solve this problem?

[Hung Bui]

Hi, 
Could you let me know which versionyour PCA10056 board is ? We had an issue with USB on boards v0.9.2

[Unia Kuo]

Hi Hung Bui,

The version of PCA10056 board is V0.9.2 2017.26.

[Hung Bui]

I see, I would suggest you to get hold of a newer board. As far as I know the issue was fixed from v0.9.3 and the current board is v0.11.0 

[hmolesworth]

Two recently purchased PCA10056 boards from Digikey are at v1.0.0

[Hung Bui]

Thanks for the clarification Hugh :)