nRF52840 USB HID, how to set up and send a feature report?

[phamquocvinh]

Hello,

I want to use  USB HID and set up  a feature report to send some configuration data. Is there any example to guide how  to do it?

Tks

[Amanda Hsieh]

Hi Vinh, 

The followings are the UBS HID examples in our SDK. You could start with them. 

USB HID Composite Example

USB HID Generic Example

Amanda H.

[phamquocvinh]

Thank you.

I was using SDK v15.3. Look like I need to upgrade to sdk v16.0.0 to use it.

[Amanda Hsieh]

Hi,

There are also these two examples in SDK v15.3. You could check usbd_hid_composite/ usbd_hid_generic under <nRF5_SDK_15.3.0>\examples\peripheral

-Amanda 

[phamquocvinh]

I want to use a Windows API ( HID_GetFeature ) to get a feature report on my device. It returns 0.

How can I fill the report feature buffer in nRF code? Which API to fill value for the feature buffer?

/**
 * @brief USB HID instance.
 */
typedef struct {
    app_usbd_hid_subclass_desc_t const ** const p_subclass_desc; //!< HID subclass descriptors array.
    size_t subclass_desc_count;                                  //!< HID subclass descriptors count.

    app_usbd_hid_subclass_t subclass_boot;    //!< Boot device (see HID definition).
    app_usbd_hid_protocol_t protocol;         //!< HID protocol (see HID definition).

    app_usbd_hid_report_buffer_t       * p_rep_buffer_in;        //!< Report buffer IN.
    app_usbd_hid_report_buffer_t const * p_rep_buffer_out;       //!< Report buffer OUT (only one instance).
    app_usbd_hid_report_buffer_t const * p_rep_buffer_feature;   //!< Report buffer FEATURE.
    app_usbd_hid_methods_t const       * p_hid_methods;          //!< Hid interface methods.
    app_usbd_hid_user_ev_handler_t       user_event_handler;     //!< User event handler.

    uint8_t * p_ep_interval;   //!< Endpoint intervals.
} app_usbd_hid_inst_t;

[Amanda Hsieh]

Please see USB HID class/app_usbd_hid_rep_buff_feature_get() in app_usbd_hid.c.

-Amanda