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Jo-Jo Smith
Jo-Jo Smith
Associate II
October 25, 2017
Solved

USB Report Length

  • October 25, 2017
  • 1 reply
  • 797 views
Posted on October 25, 2017 at 21:34

I have the USB HID demo working on an STM32F072B-DISCO board. I grabbed the code from the HID demo app to make a custom Windows project. Everything works alright, but I want to increase the report length (the demo report length is 2). I changed the HID_IN_PACKET and HID_OUT_PACKET macros to 64. After my device enumerates, USB Viewer shows the wMaxPacketSize as 64 as expected. However, the HIDP_CAPS InputReportByteLength and OutputReportByteLength in my Windows app are still reporting lengths of 2.

How do I increase the input and output report lengths in the demo application?

    This topic has been closed for replies.
    Best answer by Jo-Jo Smith
    Posted on October 27, 2017 at 01:43

    I figured it out.

    I needed to increase the report number, report size, and maximum logical value in my report description.

    1 reply

    Jo-Jo Smith
    Jo-Jo SmithAuthorBest answer
    Associate II
    October 26, 2017
    Posted on October 27, 2017 at 01:43

    I figured it out.

    I needed to increase the report number, report size, and maximum logical value in my report description.

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