async def METHOD_NAME(self, device, args):
    iface = await device.demultiplexer.claim_interface(self, self.mux_interface, args)
    for _ in range(10):
        sync = 0
        while not (sync & 0x80):
            sync = (await iface.read(1))[0]
        frame = (sync & 0x3e) >> 1
        row   = ((sync & 0x01) << 7) | (await iface.read(1))[0]
        print("frame {} row {}".format(frame, row))