LPC1343 ROM USB HID support: What does SampleInterval do?

[kevinmartin]

I'm using the ROM USB driver on the LPC1343 to implement a custom HID device. One of the fields supplied to the "init" method is called "SampleInterval" and is described as "Interrupt endpoint (IN and OUT) sample interval in ms."

In my mind, use of interrupts and sampling are pretty much polar opposites so I'm having trouble making any sense whatsoever from this description.

Does anyone have any clues on what these do?

[jeremyzhou]

Hi Kevin Martin,

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
Hope the Fig 1 can answer your question.

Fig 1

Have a great day,
TIC

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