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LLYC.1
LLYC.1
Associate
March 24, 2021
Solved

USB custom HID increase report Size more than 255 bytes？

  • March 24, 2021
  • 3 replies
  • 1118 views

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Best answer by LLYC.1

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3 replies

LLYC.1
LLYC.1AuthorBest answer
Associate
March 25, 2021

0693W000008xqxjQAA.jpg

I
Imen.D
Technical Moderator
March 25, 2021

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
April 1, 2021

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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