https://community.nxp.com/t5/MCUXpresso-General/USB-not-connecting-from-VCOM-CDC-example/m-p/1159516#M3951 <P>Ah, found it! I had this plugged into a hub and that was causing problems apparently. Plugging it directly into my machine and it enumerates correctly!</P><P>Why that would be is a mystery that I'd like to know about at some point tho...</P> Fri, 25 Sep 2020 20:13:00 GMT randylee 2020-09-25T20:13:00Z https://community.nxp.com/t5/MCUXpresso-General/USB-not-connecting-from-VCOM-CDC-example/m-p/1159514#M3950 <P>Using an LPC55S16 dev board and wanting to talk CDC VCOM out on the USB FS port.</P><P>Using MXCUexpresso 11.2 and SDK 2.8.2</P><P>Pulled in the lpcxresso55s16_dev_cdc_vcom_bm and the lite version of this, compiled (without problems) and ran it out onto the board. Board is being powered by the debug interface so is providing a vcom for that (LPC-Link II UCom Port) just fine, it looks like.</P><P>The problem is that neither of these stock, out of the box things will connect on either of the USB ports.&nbsp; Windows (10) shows an error of Unkown USB Device (Device Descriptor Request Failed) which tells me it doesn't get real far here...</P><P>Any ideas?&nbsp; Neither of these stock projects works out of the box....</P> Fri, 25 Sep 2020 20:01:04 GMT https://community.nxp.com/t5/MCUXpresso-General/USB-not-connecting-from-VCOM-CDC-example/m-p/1159514#M3950 randylee 2020-09-25T20:01:04Z https://community.nxp.com/t5/MCUXpresso-General/USB-not-connecting-from-VCOM-CDC-example/m-p/1159516#M3951 <P>Ah, found it! I had this plugged into a hub and that was causing problems apparently. Plugging it directly into my machine and it enumerates correctly!</P><P>Why that would be is a mystery that I'd like to know about at some point tho...</P> Fri, 25 Sep 2020 20:13:00 GMT https://community.nxp.com/t5/MCUXpresso-General/USB-not-connecting-from-VCOM-CDC-example/m-p/1159516#M3951 randylee 2020-09-25T20:13:00Z