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##

# 2.2.4.40 USB_DEVICE_INDEX_0 Macro

## C

    #define USB_DEVICE_INDEX_0 0

## Summary

USB Device Layer Index Numbers

These constants provide USB device layer index definitions.

## Remarks

These constants should be used in place of hard-coded numeric literals. These values should be passed into the USB_DEVICE_Initialize and USB_DEVICE_Open routines to identify the device layer instance in use.