Changing NXP USB HOST lite for HID class

Hi,

I have worked with NXP USB host lite example and successful tested it for my USB stick ,now i want to change the code for HID class as it is mean for Mass storage Class only .
By studying i come to know that i have to do two things
1.Change the BULK descriptor to INTERRUPT for HID
2.Support for Report parsing

but i do not know how to do these?
any body done this please guide me how to do this ,i am targeting the LPC1754 from NXP

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