def set_pin(self, d):
GuideOutBase.set_pin(self, d)
# Get current flags
p = struct.pack('I', 0)
flags = fcntl.ioctl(self.fileobj.fileno(), termios.TIOCMGET, p)
# Convert four byte string to integer
flags = struct.unpack('I', flags)[0]
if d > 0:
flags |= termios.TIOCM_RTS
else:
flags &= ~termios.TIOCM_RTS
if d < 0:
flags |= termios.TIOCM_DTR
else:
flags &= ~termios.TIOCM_DTR
# Set new flags
p = struct.pack('I', flags)
fcntl.ioctl(self.fileobj.fileno(), termios.TIOCMSET, p)
def __init__(self): GuideOutBase.__init__(self) device = '/dev/ttyUSB0' self.fileobj = open(device, 'rw')