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2 HIDs in one composite USB code

dhanush nair

I need to write 2HIds in one composite device in STM32 microcontrollers.One for pointer mouse operation and other one for keypad operation.So i wish to know is it possible to do so?If yes will I need to write 2 separate report descriptors.I am using 2 interfaces and 2 ENDPOINTS (enp1 and enp2). Please help...

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  • 0 in reply to dhanush nair

    > Can you also explain me how to proceed with 2HID report descriptor composite device ??

    The implementation of composite device heavily depends on the USB stack on which you are working. Not just the descriptors, you have to modify
    - Get_Descriptor( HID_Report ) process
    - Enabling additional EP(s)
    etc.

    Which one are you playing?
    - Keil RL-USB
    - ST's STSW-STM32046 - STM32_USB-Host-Device_Lib_V2.1.0
    - ST's STSW-STM32121 - STM32_USB-FS-Device_Lib_V4.0.0
    etc.

    Tsuneo

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  • 0 in reply to dhanush nair

    > Can you also explain me how to proceed with 2HID report descriptor composite device ??

    The implementation of composite device heavily depends on the USB stack on which you are working. Not just the descriptors, you have to modify
    - Get_Descriptor( HID_Report ) process
    - Enabling additional EP(s)
    etc.

    Which one are you playing?
    - Keil RL-USB
    - ST's STSW-STM32046 - STM32_USB-Host-Device_Lib_V2.1.0
    - ST's STSW-STM32121 - STM32_USB-FS-Device_Lib_V4.0.0
    etc.

    Tsuneo

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