def init_capture():
global state
global img_transfer
global irq_transfer
r = usb.submit_transfer(irq_transfer)
if r < 0:
return r
r = usb.submit_transfer(img_transfer)
if r < 0:
usb.cancel_transfer(irq_transfer)
while irq_transfer:
if usb.handle_events(None) < 0:
break
return r
# start state machine
state = STATE_AWAIT_IRQ_FINGER_REMOVED
return next_state()
def main():
global devh
global img_transfer
global irq_transfer
global do_exit
exit_sem = sem_open(SEM_NAME, O_CREAT, 0)
if not exit_sem:
print("failed to initialise semaphore error {}".format(errno), file=sys.stderr)
sys.exit(1)
# only using this semaphore in this process so go ahead and unlink it now
sem_unlink(SEM_NAME)
r = usb.init(None)
if r < 0:
print("failed to initialise libusb", file=sys.stderr)
sys.exit(1)
r = find_dpfp_device()
try:
if r < 0:
print("Could not find/open device", file=sys.stderr)
return abs(r)
r = usb.claim_interface(devh, 0)
if r < 0:
print("usb_claim_interface error {} {}".format(r, usb.strerror(usb.error(r))), file=sys.stderr)
return abs(r)
print("claimed interface")
r = print_f0_data()
if r < 0:
usb.release_interface(devh, 0)
return abs(r)
r = do_init()
try:
if r < 0:
return abs(r)
# async from here onwards
#sigact = struct_sigaction()
#sigact.sa_handler = sighandler
#sigemptyset(ct.byref(sigact.sa_mask))
#sigact.sa_flags = 0
signal.signal(signal.SIGINT, sighandler)
signal.signal(signal.SIGTERM, sighandler)
if hasattr(signal, "SIGQUIT"):
signal.signal(signal.SIGQUIT, sighandler)
r = pthread_create(ct.byref(poll_thread), NULL, poll_thread_main, NULL)
if r:
return abs(r)
r = alloc_transfers()
if r < 0:
request_exit(1)
pthread_join(poll_thread, NULL)
return abs(r)
r = init_capture()
if r < 0:
request_exit(1)
pthread_join(poll_thread, NULL)
return abs(r)
while not do_exit:
sem_wait(exit_sem)
print("shutting down...")
pthread_join(poll_thread, NULL)
r = usb.cancel_transfer(irq_transfer)
if r < 0:
request_exit(1)
return abs(r)
r = usb.cancel_transfer(img_transfer)
if r < 0:
request_exit(1)
return abs(r)
while irq_transfer or img_transfer:
if usb.handle_events(None) < 0:
break
r = 0 if do_exit == 1 else 1
finally:
usb.free_transfer(img_transfer)
usb.free_transfer(irq_transfer)
set_mode(0);
set_hwstat(0x80)
usb.release_interface(devh, 0)
finally:
usb.close(devh)
usb.exit(None)
return abs(r)
def main(argv=sys.argv):
global devh
global img_transfer
global irq_transfer
global do_exit
r = usb.init(None)
if r < 0:
print("failed to initialise libusb", file=sys.stderr)
sys.exit(1)
r = find_dpfp_device()
try:
if r < 0:
print("Could not find/open device", file=sys.stderr)
return abs(r)
r = usb.claim_interface(devh, 0)
if r < 0:
print("usb_claim_interface error {}".format(r), file=sys.stderr)
return abs(r)
print("claimed interface")
r = print_f0_data()
if r < 0:
usb.release_interface(devh, 0)
return abs(r)
r = do_init()
try:
if r < 0:
return abs(r)
# async from here onwards
r = alloc_transfers()
if r < 0:
return abs(r)
r = init_capture()
if r < 0:
return abs(r)
#sigact = struct_sigaction()
#sigact.sa_handler = sighandler
#sigemptyset(ct.byref(sigact.sa_mask))
#sigact.sa_flags = 0
signal.signal(signal.SIGINT, sighandler)
signal.signal(signal.SIGTERM, sighandler)
if hasattr(signal, "SIGQUIT"):
signal.signal(signal.SIGQUIT, sighandler)
while not do_exit:
r = usb.handle_events(None)
if r < 0:
return abs(r)
print("shutting down...")
if irq_transfer:
r = usb.cancel_transfer(irq_transfer)
if r < 0:
return abs(r)
if img_transfer:
r = usb.cancel_transfer(img_transfer)
if r < 0:
return abs(r)
while irq_transfer or img_transfer:
if usb.handle_events(None) < 0:
break
r = 0 if do_exit == 1 else 1
finally:
usb.free_transfer(img_transfer)
usb.free_transfer(irq_transfer)
set_mode(0);
set_hwstat(0x80)
usb.release_interface(devh, 0)
finally:
usb.close(devh)
usb.exit(None)
return abs(r)