USBD_Callbacks_TypeDef Struct Reference

USB Device stack callback structure.

#include <em_usb.h>

Data Fields

const USBD_UsbResetCb_TypeDef usbReset
Called whenever USB reset signalling is detected on the USB port.
const USBD_DeviceStateChangeCb_TypeDef usbStateChange
Called whenever the device change state.
const USBD_SetupCmdCb_TypeDef setupCmd
Called on each setup request received from host.
const USBD_IsSelfPoweredCb_TypeDef isSelfPowered
Called whenever the device stack needs to query if the device is currently self- or bus-powered.
const USBD_SofIntCb_TypeDef sofInt
Called at each SOF interrupt.

USB Device stack callback structure.

Callback functions used by the device stack to signal events or query status to/from the application. See USBD_Init_TypeDef . Assign members to NULL if your application don't need a specific callback.

Field Documentation

usbReset

const USBD_UsbResetCb_TypeDef USBD_Callbacks_TypeDef::usbReset

Called whenever USB reset signalling is detected on the USB port.


usbStateChange

const USBD_DeviceStateChangeCb_TypeDef USBD_Callbacks_TypeDef::usbStateChange

Called whenever the device change state.


setupCmd

const USBD_SetupCmdCb_TypeDef USBD_Callbacks_TypeDef::setupCmd

Called on each setup request received from host.

isSelfPowered

const USBD_IsSelfPoweredCb_TypeDef USBD_Callbacks_TypeDef::isSelfPowered

Called whenever the device stack needs to query if the device is currently self- or bus-powered.

Applies to devices which can operate in both modes.

sofInt

const USBD_SofIntCb_TypeDef USBD_Callbacks_TypeDef::sofInt

Called at each SOF interrupt.

If NULL, the device stack will not enable the SOF interrupt.