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Welcome to the PORTS Forum. Please post your questions, answers, and comments relating to USB and other hardware interfaces in the appropriate forums below. - Jan
Ports > General Category > USB > Max 'safe' feature report size?
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Author Topic: Max 'safe' feature report size?  (Read 557 times)
Emeryth
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« on: July 16, 2012, 05:54:17 am »
Hello,

I am developing a USB HID device that acts as a keyboard and, in addition, communicates with the host via feature reports.
I was wondering what is the maximum size of a feature report that should work on all systems (Windows/Linux/OSX) and hardware platforms?
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Jan Axelson
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« Reply #1 on: July 16, 2012, 01:03:17 pm »
In Get_Report and Set_Report requests, the report length field is two bytes, which limits reports to 65,535 bytes.

I don't know if all popular OSes support Feature reports of that length.

 

Jan
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