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STM32L4 Discovery USB issue

Question asked by mukherjee.bhaskar on Jan 26, 2016
Latest reply on Apr 13, 2016 by Nesrine M
Hello All,
    I am having trouble using the USB OTG peripheral on the 32L476GDISCOVERY board. I took off the LCD and shorted the solder bridges that connect the Vbus (and the USB ID) pin. I am trying to use the board as a USB Device connected to a PC.
    I do not see any activity on the DP and DM lines when I connect a USB cable. More troubling is the fact that I am not getting 5V on the Vusb pin of the Micro USB connector when it is connected to a PC. I tried connecting a USB charger to the port to eliminate any PC related issues and I still did not get 5V.
    Has anyone here used the STM32L4 discovery board as a USB device? The Radar project on this page http://www.rs-online.com/designspark/electronics/blog/creating-a-radar-speed-detector-with-a-stm32l476-discovery-board seems to be using the USB OTG port without any issues. However that project does not have any information on the Discovery board itself.
    I looked at the schematic to figure out if anything might be holding the Vbus pin to ground but nothing seems out of place. I am out of ideas at this point and looking for anyone in this forum to provide me with a little guidance.

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