SYNOPSIS
#include <nut-scan.h>
nutscan_device_t * nutscan_scan_usb();
DESCRIPTION
The nutscan_scan_usb() function try to detect NUT compatible USB devices.
You MUST call nutscan_init(3) before using this function.
RETURN VALUE
The nutscan_scan_usb() function returns a pointer to a nutscan_device_t structure containing all found devices or NULL if an error occurs or no device is found.