fcm_status
read_status(usb_device_info *udi, fcm_status *fst)
memset(fst, 0, sizeof(fcm_status));
status = queue_bulk(udi, fst, sizeof(fcm_status), true);
if(udi->actual_len != sizeof(fcm_status)){
sizeof(fcm_status), udi->actual_len);
fcm_status *fst,
fcm_status fst = {0};
void trace_status(usb_device_info *udi, const fcm_status *st)