I m writing program for USB host Virtual com port(LPC1768). May be this question found silly but this is confusing me.
Im getting frames correctly upto get line coding After that host is not responding to the device.I m continously getting NACK after every IN after get line coding.
Second issue is i can see the comp port in com port list. I installed drivers through inf file. But when i tried to open the comp port it shows "error: unable to open the com port".reasone for this is the code issue or the drivers issue.
I m bit confuse with the flow of frames in the virtual com port. can any one tell me the flow of frames.which will be the next frame after get line coding.what happened when this frame comes in a picture in hardware point of view.
Hi john thanx for number of replies. Today i finished with USB CDC i was mistaken in end point write.That is the main reason i didnt get the answer for get line coding and other silly reasons.Any ways thanx for help. My next work is USB mass storage device(LPC1768 as a mass storage device).If u have already worked on that i need your help.