Converting USB HID generic device to HID keyboard

Jan 11, 2008 2 Replies
J

Hello.



I am working with device with HID keyboard feature but not exactly keyboard. First I have implemented USB keyboard functionality with sample code supplied by MCU vender(ATMEL) but speed was too slow. There was also generic USB HID device sample code so I have tried to use it but I couldn't convert it to HID keyboard. I comrad said that only some descriptor modification will change it so I tried but I couldn't. Is it true that only descriptor change can do this or should I modify some other parts? descriptor I have changed is product id, interface subclass, interface protocol, number of endpoint etc.. I have examined descriptor of ready-made product by USB monitor program. I know little about USB and I don't have time to look into USB protocol. Please answer.



Thanks.



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E

Too slow for what? Do you mean that there is a human-perceptible delay? That would be quite surprising.

Or are you trying to use the HID class for something that isn't actually operated by a human?

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A

If you don't have time to learn about the technology you're using, we don't have the time to answer your questions.

-a

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