Hello Nandan, I'm assuming you're not able to see the source to tell me where exactly does it hang. Try changing TX_NO_WAIT to 1. Generally with USB CDC, you should use TX_WAIT_FOREVER as there are some delays inserted into the code regardless. How much data are you writing? Did you change memory and read input buffer sizes in the configuration from the default values (64K and 128 bytes respectively)? Regards
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