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LLYC.1
LLYC.1
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Mar 24, 2021 12:25 PM UTC
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USB custom HID increase report Size more than 255 bytes？

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LLYC.1
LLYC.1Best answer
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Mar 25, 2021 1:42 AM UTC

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LLYC.1
LLYC.1AuthorBest answer
Associate
Mar 25, 2021 1:42 AM UTC

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Imen.D
ST Technical Moderator
Mar 25, 2021 3:29 PM UTC

Hello @LLYC.1​ and welcome to the STM32 Community :)

The max descriptor size is 255. This is specific to the USB protocol.

Imen

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TPham.4
TPham.4
Associate
Apr 1, 2021 5:08 PM UTC

I notice the comment is incorrect. At first I thought this is to increase the size of the IN/OUT Endpoint but is is actually increasing the size of the descriptor. And the generated code is incorrect. It still left at 2.

It seems to be a bug in CubeMX.

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