struct usb_device_info * usb_open_and_wait_for_device(void) {
libusb_device **devs;
libusb_device **dev;
struct usb_device_info * ret = NULL;
int i = 0;
void (*prev)(int);
static char progress[] = {'/','-','\\', '|'};
if ( libusb_init(NULL) < 0 ) {
PRINTF_LINE("libusb_init failed");
PRINTF_END();
return NULL;
}
PRINTF_BACK();
printf("\n");
signal_quit = 0;
prev = signal(SIGINT, signal_handler);
while ( ! signal_quit ) {
PRINTF_LINE("Waiting for USB device... %c", progress[++i%sizeof(progress)]);
if ( libusb_get_device_list(NULL, &devs) < 0 ) {
PRINTF_LINE("Listing USB devices failed");
PRINTF_END();
break;
}
for ( dev = devs; *dev != NULL; ++dev ) {
ret = usb_device_is_valid(*dev);
if ( ret )
break;
}
libusb_free_device_list(devs, 1);
if ( ret )
break;
SLEEP(0xc350); // 0.5s
}
if ( prev != SIG_ERR )
signal(SIGINT, prev);
PRINTF_BACK();
printf("\n");
if ( ! ret )
return NULL;
return ret;
}
static struct usb_device_info * usb_search_device(struct usb_device * dev, int level) {
int i;
struct usb_device_info * ret = NULL;
if ( ! dev )
return NULL;
ret = usb_device_is_valid(dev);
if ( ret )
return ret;
for ( i = 0; i < dev->num_children; i++ ) {
ret = usb_search_device(dev->children[i], level + 1);
if ( ret )
break;
}
return ret;
}
