def open_interface(tty, bitrate, logger=None):
if logger:
logger.debug("open_interface: {} {:d}".format(tty, bitrate))
# Different procedures are required for PyFTDI and PySerial
if len(tty) > 4 and tty[:4] == "ftdi":
from pyftdi.ftdi import Ftdi
import pyftdi.serialext
for pid in FTDI_PRODUCT_IDS:
try:
Ftdi.add_custom_product(Ftdi.DEFAULT_VENDOR, pid)
except ValueError:
pass
if logger:
logger.info("Using pyftdi")
Ftdi.show_devices()
ser = pyftdi.serialext.serial_for_url(tty,
baudrate=bitrate,
timeout=DEFAULT_TIMEOUT_SECONDS)
# XXX should raise exception for illegal caudrate
else:
import serial
if logger:
logger.debug("Using pyserial")
try:
ser = serial.Serial(tty, bitrate, timeout=DEFAULT_TIMEOUT_SECONDS)
except serial.SerialException:
raise
return ser
def __init__(self, idVendor=None, idProduct=None, serialNumber=None, portPath=None, port=None):
CommunicationPort.__init__(self)
try:
Ftdi.add_custom_product(vid=4930, pid=1, pidname="Sutter")
except:
pass
if idVendor is not None and portPath is None:
portPath = SerialPort.matchAnyPort(idVendor, idProduct, serialNumber)
if portPath is not None:
self.portPath = portPath
else:
self.portPath = None
if port is not None and port.is_open:
port.close()
self.port = None # direct port, must be closed.
You have to make your own time out like :
bb = ''
start_time = time.time()
while (not bool(bb) and (time.time() - start_time) < timeout_sec):
bb = motor_stageXY.read(90)
You also have to use "write_data" and "read_data" instead of 'write' and 'read'
It's better also to use time.sleep(0.1) between commands
'''
timeout_sec = 2
from pyftdi.ftdi import Ftdi
# PID seems to be FAF0 in device manager
Ftdi.add_custom_product(0x403, 0xfaf0)
try:
motor_stageXY = Ftdi.create_from_url('ftdi://0x403:0xfaf0/1')
motor_stageXY.open_from_url(url='ftdi://0x403:0xfaf0/1')
motor_stageXY.set_baudrate(115200)
motor_stageXY.set_line_property(8, 1, 'N',
break_=0) # 'N' = parity_none
time.sleep(50e-3) # pre-purge
motor_stageXY.purge_buffers() # purge RX and TX buffers
time.sleep(50e-3) # post-purge
motor_stageXY._reset_device(
) # private module, unlock it to public if no access
motor_stageXY.set_flowctrl('hw') # 'hw' means RTS/CTS UART lines
# f1.set_rts(state) # not sure for this one, the doc does not specify the 'state'
