def test_dual_if_reset(self):
"""Demonstrate how to connect to an hotplugged FTDI device, i.e.
an FTDI device that is connected after the initial attempt to
enumerate it on the USB bus."""
url1 = environ.get('FTDI_DEVICE', 'ftdi:///1')
ftdi1 = Ftdi()
ftdi1.open_from_url(url1)
count = ftdi1.device_port_count
if count < 2:
ftdi1.close()
raise SkipTest('FTDI device is not a multi-port device')
next_port = (int(url1[-1]) % count) + 1
url2 = 'ftdi:///%d' % next_port
ftdi2 = Ftdi()
self.assertTrue(ftdi1.is_connected, 'Unable to connect to FTDI')
ftdi2.open_from_url(url2)
# use latenty setting to set/test configuration is preserved
ftdi2.set_latency_timer(128)
# should be the same value
self.assertEqual(ftdi2.get_latency_timer(), 128)
self.assertTrue(ftdi2.is_connected, 'Unable to connect to FTDI')
ftdi1.close()
self.assertFalse(ftdi1.is_connected, 'Unable to close connection')
# closing first connection should not alter second interface
self.assertEqual(ftdi2.get_latency_timer(), 128)
ftdi1.open_from_url(url1)
self.assertTrue(ftdi1.is_connected, 'Unable to connect to FTDI')
# a FTDI reset should not alter settings...
ftdi1.reset(False)
self.assertEqual(ftdi2.get_latency_timer(), 128)
# ... however performing a USB reset through any interface should alter
# any previous settings made to all interfaces
ftdi1.reset(True)
self.assertNotEqual(ftdi2.get_latency_timer(), 128)
def test_multiple_interface(self):
# the following calls used to create issues (several interfaces from
# the same device). The test expects an FTDI 2232H here
ftdi1 = Ftdi()
ftdi1.open(vendor=0x403, product=0x6010, interface=1)
ftdi2 = Ftdi()
ftdi2.open(vendor=0x403, product=0x6010, interface=2)
for _ in range(5):
print("If#1: ", hex(ftdi1.poll_modem_status()))
print("If#2: ", ftdi2.modem_status())
sleep(0.500)
ftdi1.close()
ftdi2.close()
def test_multiple_interface(self):
# the following calls used to create issues (several interfaces from
# the same device)
ftdi1 = Ftdi()
ftdi1.open(interface=1)
ftdi2 = Ftdi()
ftdi2.open(interface=2)
import time
for x in range(5):
print "If#1: ", hex(ftdi1.poll_modem_status())
print "If#2: ", ftdi2.modem_status()
time.sleep(0.500)
ftdi1.close()
ftdi2.close()
def open(self, baud=None):
if self.b_ftdi_obj:
if baud is not None:
self.ser.set_baudrate(baud)
return self.isopen
if self.ser is not None:
if self.isopen: self.close()
if self.ser is None:
self.ser = Ftdi()
self.isopen = False
try:
self.ser.open(vendor=self.VENDOR_ID,
product=self.pid,
interface=self.devno)
self.isopen = True
except:
pass
if baud is None:
baud = self.self.BAUD_DEFAULT
self.ser.set_baudrate(baud)
return self.isopen
def __init__(self):
self._ftdi = Ftdi()
self.log = getLogger('pyftdi.i2c')
self._slaves = {}
self._frequency = 0.0
self._direction = I2cController.SCL_BIT | I2cController.SDA_O_BIT
self._immediate = (Ftdi.SEND_IMMEDIATE, )
self._idle = (Ftdi.SET_BITS_LOW, self.IDLE, self._direction)
data_low = (Ftdi.SET_BITS_LOW, self.IDLE & ~self.SDA_O_BIT,
self._direction)
clock_low_data_low = (Ftdi.SET_BITS_LOW,
self.IDLE & ~(self.SDA_O_BIT | self.SCL_BIT),
self._direction)
self._clock_low_data_high = (Ftdi.SET_BITS_LOW,
self.IDLE & ~self.SCL_BIT,
self._direction)
self._read_bit = (Ftdi.READ_BITS_PVE_MSB, 0)
self._read_byte = (Ftdi.READ_BYTES_PVE_MSB, 0, 0)
self._write_byte = (Ftdi.WRITE_BYTES_NVE_MSB, 0, 0)
self._nack = (Ftdi.WRITE_BITS_NVE_MSB, 0, self.HIGH)
self._ack = (Ftdi.WRITE_BITS_NVE_MSB, 0, self.LOW)
self._start = data_low * 4 + clock_low_data_low * 4
self._stop = clock_low_data_low * 4 + data_low * 4 + self._idle * 4
self._tristate = None
self._tx_size = 1
self._rx_size = 1
def __init__(self, ftdi_pid='232r', serial_num=None, laser_pin=PIN_CTS):
"""Inits LaserPointer object.
Initializes a LaserPointer object by constructing an Ftdi object and opening the desired
FTDI device. Configures the FTDI device to bitbang mode.
Args:
ftdi_pid: Product ID string for the FTDI device.
serial_num: String containing the serial number of the FTDI device. If None, any
serial number will be accepted.
laser_pin: Integer bit mask with a single bit set corresponding to the pin on the FTDI
device that controls the laser pointer.
"""
self.laser_pin = laser_pin
self.ftdi = Ftdi()
self.ftdi.open_bitbang(
vendor=Ftdi.VENDOR_IDS['ftdi'],
product=Ftdi.PRODUCT_IDS[Ftdi.FTDI_VENDOR][ftdi_pid],
serial=serial_num, # serial number of FT232RQ in the laser FTDI cable
latency=Ftdi.LATENCY_MAX, # 255ms; reduce if necessary (at cost of higher CPU usage)
)
# set laser_pin as output, all others as inputs
self.ftdi.set_bitmode(self.laser_pin, Ftdi.BitMode.BITBANG)
assert self.ftdi.bitbang_enabled
# make sure laser is disabled by default
self.set(False)
def test_close_on_disconnect(self):
"""Validate close after disconnect."""
log = logging.getLogger('pyftdi.tests.ftdi')
url = environ.get('FTDI_DEVICE', 'ftdi:///1')
ftdi = Ftdi()
ftdi.open_from_url(url)
self.assertTrue(ftdi.is_connected, 'Unable to connect to FTDI')
print('Please disconnect FTDI device')
while ftdi.is_connected:
try:
ftdi.poll_modem_status()
except FtdiError:
break
sleep(0.1)
ftdi.close()
print('Please reconnect FTDI device')
while True:
UsbTools.flush_cache()
try:
ftdi.open_from_url(url)
except (FtdiError, UsbToolsError):
log.debug('FTDI device not detected')
sleep(0.1)
except ValueError:
log.warning('FTDI device not initialized')
ftdi.close()
sleep(0.1)
else:
log.info('FTDI device detected')
break
ftdi.poll_modem_status()
ftdi.close()
def test_enumerate(self):
"""Check simple enumeration of two similar FTDI device."""
ftdi = Ftdi()
temp_stdout = StringIO()
with redirect_stdout(temp_stdout):
self.assertRaises(SystemExit, ftdi.open_from_url, 'ftdi:///?')
lines = [l.strip() for l in temp_stdout.getvalue().split('\n')]
lines.pop(0) # "Available interfaces"
while lines and not lines[-1]:
lines.pop()
self.assertEqual(len(lines), 10)
for line in lines:
self.assertTrue(line.startswith('ftdi://'))
# skip description, i.e. consider URL only
url = line.split(' ')[0]
urlparts = urlsplit(url)
self.assertEqual(urlparts.scheme, 'ftdi')
parts = urlparts.netloc.split(':')
if parts[1] == '4232':
# def file contains no serial number, so expect bus:addr syntax
self.assertEqual(len(parts), 4)
self.assertRegex(parts[2], r'^\d$')
self.assertRegex(parts[3], r'^\d$')
else:
# other devices are assigned a serial number
self.assertEqual(len(parts), 3)
self.assertTrue(parts[2].startswith('FT'))
self.assertRegex(urlparts.path, r'^/\d$')
def createdevpinout(self,ftdidevicename,devtype="",devorder=-1):
global PINOUT
startpoint = len(Settings.Pinout)
try:
fi = Ftdi()
fi = fi.create_from_url(ftdidevicename)
gpionum = fi.port_width
lismpsse = fi.has_mpsse
lportindex = fi.port_index
fi.close()
except Exception as e:
gpionum = 0
if gpionum>0:
for g in range(0,gpionum):
pname = get_ftdi_pinnames(g,lportindex,lismpsse)
if devorder>-1:
try:
pname[2] = pname[2].replace("SPI-","SPI"+str(devorder)+"-")
pname[3] = pname[3].replace("I2C-","I2C"+str(devorder)+"-")
except:
pass
pindet = {"ID": int(startpoint+g),
"BCM":int(startpoint+g),
"realpin":int(g),
"name":pname,
"canchange":1,
"altfunc": 0,
"startupstate":-1,
"actualstate":-1,
"ftdevice":ftdidevicename,
"ftdevtype":devtype
}
Settings.Pinout.append(pindet)
pindet = None
def __init__(self, trst=False, frequency=3.0E6, usb_read_timeout=5000, usb_write_timeout=5000, debug=False):
"""
trst uses the nTRST optional JTAG line to hard-reset the TAP
controller
"""
self._ftdi = Ftdi()
self._lock = Lock()
self._ftdi.timeouts = (usb_read_timeout, usb_write_timeout)
self._trst = trst
self._frequency = frequency
self._ftdi_opened = False
self._immediate = bytes((Ftdi.SEND_IMMEDIATE,))
self.direction = (JtagController.TCK_BIT |
JtagController.TDI_BIT |
JtagController.TMS_BIT |
(self._trst and JtagController.TRST_BIT or 0))
# all JTAG outputs are low - Additionally, setting this upper
# bits as outputs and then having a specific initial value
# gets the PYNQ-Z1 board working
self.direction |= 0x90
self.initialout = 0xe0
#@@@#self.initialout = self.direction
self._last = None # Last deferred TDO bit
self._write_buff = array('B')
self._debug = debug
def __init__(self, silent_clock=False, cs_count=4, turbo=True):
self._ftdi = Ftdi()
self._cs_bits = (((SpiController.CS_BIT << cs_count) - 1)
& ~(SpiController.CS_BIT - 1))
self._ports = [None] * cs_count
self._direction = (self._cs_bits | SpiController.DO_BIT
| SpiController.SCK_BIT)
self._turbo = turbo
self._cs_high = Array('B')
if self._turbo:
if silent_clock:
# Set SCLK as input to avoid emitting clock beats
self._cs_high.extend([
Ftdi.SET_BITS_LOW, self._cs_bits,
self._direction & ~SpiController.SCK_BIT
])
# /CS to SCLK delay, use 8 clock cycles as a HW tempo
self._cs_high.extend([Ftdi.WRITE_BITS_TMS_NVE, 8 - 1, 0xff])
# Restore idle state
self._cs_high.extend(
[Ftdi.SET_BITS_LOW, self._cs_bits, self._direction])
if not self._turbo:
self._cs_high.append(Ftdi.SEND_IMMEDIATE)
self._immediate = Array('B', [Ftdi.SEND_IMMEDIATE])
self._frequency = 0.0
def test_eeprom_read(self):
"""Check full read sequence."""
ftdi = Ftdi()
ftdi.open_from_url('ftdi:///1')
data = ftdi.read_eeprom()
self.assertEqual(len(data), 0x400)
ftdi.close()
def test_input_gpio(self):
"""Simple test to demonstrate input bit-banging on CBUS.
You need a CBUS-capable FTDI (FT232R/FT232H/FT230X/FT231X), whose
EEPROM has been configured to support GPIOs on CBUS0 and CBUS3.
Hard-wiring is required to run this test:
* CBUS0 (input) should be connected to RTS (output)
* CBUS3 (input) should be connected to DTR (output)
"""
ftdi = Ftdi()
ftdi.open_from_url(self.url)
# sanity check: device should support CBUS feature
self.assertEqual(ftdi.has_cbus, True)
eeprom = FtdiEeprom()
eeprom.connect(ftdi)
# sanity check: device should have been configured for CBUS GPIOs
self.assertEqual(eeprom.cbus_mask & 0b1001, 0b1001)
# configure CBUS0 and CBUS3 as input
ftdi.set_cbus_direction(0b1001, 0b0000)
# no output pin available
self.assertRaises(FtdiError, ftdi.set_cbus_gpio, 0)
for cycle in range(40):
rts = bool(cycle & 0x1)
dtr = bool(cycle & 0x2)
ftdi.set_rts(rts)
ftdi.set_dtr(dtr)
# need to inverse logical level as RS232 uses negative logic
cbus = ~ftdi.get_cbus_gpio()
sig = (cbus & 0x1) | ((cbus & 0x8) >> 2)
value = cycle & 0x3
self.assertEqual(value, sig)
def setUpClass(cls):
FtdiTestCase.setUpClass()
if VirtLoader:
cls.loader = VirtLoader()
with open('pyftdi/tests/resources/ft2232h.yaml', 'rb') as yfp:
cls.loader.load(yfp)
vftdi = cls.loader.get_virtual_ftdi(1, 1)
vport1 = vftdi.get_port(1)
vport2 = vftdi.get_port(2)
# create virtual connections as real HW
in_pins = [vport1[pos] for pos in range(16)]
out_pins = [vport2[pos] for pos in range(16)]
for in_pin, out_pin in zip(in_pins, out_pins):
out_pin.connect_to(in_pin)
# prevent from using the tracer twice (Ftdi & VirtualFtdi)
cls.debug_mpsse = False
else:
cls.debug_mpsse = cls.debug
url = environ.get('FTDI_DEVICE', 'ftdi:///1')
ftdi = Ftdi()
ftdi.open_from_url(url)
count = ftdi.device_port_count
width = ftdi.port_width
ftdi.close()
if count < 2:
raise SkipTest('FTDI device is not a multi-port device')
if width < 2:
raise SkipTest('FTDI device does not support wide ports')
url = url[:-1]
cls.urls = [f'{url}1', f'{url}2']
def test_output_gpio(self):
"""Simple test to demonstrate ouput bit-banging on CBUS.
You need a CBUS-capable FTDI (FT232R/FT232H/FT230X/FT231X), whose
EEPROM has been configured to support GPIOs on CBUS0 and CBUS3.
Hard-wiring is required to run this test:
* CBUS0 (output) should be connected to CTS (input)
* CBUS3 (output) should be connected to DSR (input)
"""
ftdi = Ftdi()
ftdi.open_from_url(self.url)
# sanity check: device should support CBUS feature
self.assertEqual(ftdi.has_cbus, True)
eeprom = FtdiEeprom()
eeprom.connect(ftdi)
# sanity check: device should have been configured for CBUS GPIOs
self.assertEqual(eeprom.cbus_mask & 0b1001, 0b1001)
# configure CBUS0 and CBUS3 as output
ftdi.set_cbus_direction(0b1001, 0b1001)
# no input pin available
self.assertRaises(FtdiError, ftdi.get_cbus_gpio)
for cycle in range(40):
value = cycle & 0x3
# CBUS0 and CBUS3
cbus = ((value & 0x2) << 2) | value & 0x1
# for now, need a digital/logic analyzer to validate output
ftdi.set_cbus_gpio(cbus)
# CBUS0 is connected to CTS, CBUS3 to DSR
# need to inverse logical level as RS232 uses negative logic
sig = int(not ftdi.get_cts()) | (int(not ftdi.get_dsr()) << 1)
self.assertEqual(value, sig)
def setUpClass(cls):
FtdiTestCase.setUpClass()
if VirtLoader:
cls.loader = VirtLoader()
with open('pyftdi/tests/resources/ft232r.yaml', 'rb') as yfp:
cls.loader.load(yfp)
vftdi = cls.loader.get_virtual_ftdi(1, 1)
vport = vftdi.get_port(1)
# create virtual connections as real HW
in_pins = [vport[pos] for pos in range(4)]
out_pins = [vport[pos] for pos in range(4, 8)]
for in_pin, out_pin in zip(in_pins, out_pins):
out_pin.connect_to(in_pin)
if cls.url == 'ftdi:///1':
# assumes that if not specific device is used, and a multiport
# device is connected, there is no loopback wires between pins of
# the same port. This hack allows to run the same test with a
# FT232H, then a FT2232H for ex, to that with two test sessions
# the whole test set is run. If a specific device is selected
# assume the HW always match the expected configuration.
ftdi = Ftdi()
ftdi.open_from_url(cls.url)
count = ftdi.device_port_count
ftdi.close()
cls.skip_loopback = count > 1
else:
cls.skip_loopback = False
def test(self):
ftdi = Ftdi()
ftdi.open_from_url(URL)
for baudrate in self.BAUDRATES:
actual, _, _ = ftdi._convert_baudrate(baudrate)
ratio = baudrate / actual
self.assertTrue(0.97 <= ratio <= 1.03, "Invalid baudrate")
def setUpClass(cls):
FtdiTestCase.setUpClass()
if VirtLoader:
cls.loader = VirtLoader()
with open('pyftdi/tests/resources/ft2232h.yaml', 'rb') as yfp:
cls.loader.load(yfp)
vftdi = cls.loader.get_virtual_ftdi(1, 1)
vport1 = vftdi.get_port(1)
vport2 = vftdi.get_port(2)
# create virtual connections as real HW
in_pins = [vport1[pos] for pos in range(8)]
out_pins = [vport2[pos] for pos in range(8)]
for in_pin, out_pin in zip(in_pins, out_pins):
out_pin.connect_to(in_pin)
ftdi = Ftdi()
ftdi.open_from_url(cls.url)
count = ftdi.device_port_count
pos = ftdi.port_index
ftdi.close()
if pos != 1:
raise ValueError("FTDI interface should be the device's first")
if count < 2:
raise SkipTest('FTDI device is not a multi-port device')
url = cls.url[:-1]
cls.urls = [f'{url}1', f'{url}2']
def __init__(self):
self._ftdi = Ftdi()
self._lock = Lock()
self.log = getLogger('pyftdi.i2c')
self._gpio_port = None
self._gpio_dir = 0
self._gpio_low = 0
self._gpio_mask = 0
self._i2c_mask = 0
self._wide_port = False
self._slaves = {}
self._retry_count = self.RETRY_COUNT
self._frequency = 0.0
self._immediate = (Ftdi.SEND_IMMEDIATE, )
self._read_bit = (Ftdi.READ_BITS_PVE_MSB, 0)
self._read_byte = (Ftdi.READ_BYTES_PVE_MSB, 0, 0)
self._write_byte = (Ftdi.WRITE_BYTES_NVE_MSB, 0, 0)
self._nack = (Ftdi.WRITE_BITS_NVE_MSB, 0, self.HIGH)
self._ack = (Ftdi.WRITE_BITS_NVE_MSB, 0, self.LOW)
self._ck_delay = 1
self._tristate = None
self._tx_size = 1
self._rx_size = 1
self._ck_hd_sta = 0
self._ck_su_sto = 0
self._ck_idle = 0
def __init__(self):
self._ftdi = Ftdi()
self.log = getLogger('pyftdi.i2c')
self._slaves = {}
self._retry_count = self.RETRY_COUNT
self._frequency = 0.0
self._direction = self.SCL_BIT | self.SDA_O_BIT
self._immediate = (Ftdi.SEND_IMMEDIATE, )
self._idle = (Ftdi.SET_BITS_LOW, self.IDLE, self._direction)
self._data_lo = (Ftdi.SET_BITS_LOW, self.IDLE & ~self.SDA_O_BIT,
self._direction)
self._clk_lo_data_lo = (Ftdi.SET_BITS_LOW,
self.IDLE & ~(self.SDA_O_BIT | self.SCL_BIT),
self._direction)
self._clk_lo_data_hi = (Ftdi.SET_BITS_LOW, self.IDLE & ~self.SCL_BIT,
self._direction)
self._read_bit = (Ftdi.READ_BITS_PVE_MSB, 0)
self._read_byte = (Ftdi.READ_BYTES_PVE_MSB, 0, 0)
self._write_byte = (Ftdi.WRITE_BYTES_NVE_MSB, 0, 0)
self._nack = (Ftdi.WRITE_BITS_NVE_MSB, 0, self.HIGH)
self._ack = (Ftdi.WRITE_BITS_NVE_MSB, 0, self.LOW)
self._start = None
self._stop = None
self._ck_delay = 1
self._tristate = None
self._tx_size = 1
self._rx_size = 1
def __init__(self, name, serial=None, port='A', baudrate=115200):
'''
discover and initialize Tunnel_DAC hardware
Input:
serial - serial number of the FTDI converter
channel - 2 character channel id the DAC is connected to;
the first byte identifies the channel (A..D for current devices)
the second byte identifies the bit within that channel (0..7)
numdacs - number of DACs daisy-chained on that line
delay - communications delay assumed between PC and the USB converter
'''
logging.info(__name__ + ': Initializing instrument Tunnel_DAC')
Instrument.__init__(self, name, tags=['physical'])
self._conn = Ftdi()
# VIDs and PIDs of converters used
vps = [
(0x0403, 0x6011), # FTDI UM4232H 4ch
(0x0403, 0x6014) # FTDI UM232H 1ch
]
# explicitly clear device cache of UsbTools
#UsbTools.USBDEVICES = []
# find all devices and obtain serial numbers
devs = self._conn.find_all(vps)
# filter list by serial number if provided
if (serial != None):
devs = [dev for dev in devs if dev[2] == serial]
if (len(devs) == 0):
logging.error(__name__ + ': failed to find matching FTDI devices.')
elif (len(devs) > 1):
logging.error(
__name__ +
': more than one converter found and no serial number given.')
logging.info(__name__ + ': available devices are: %s.' %
str([dev[2] for dev in devs]))
vid, pid, self._serial, ports, description = devs[0]
self._ports = [chr(ord('A') + i) for i in range(ports)]
# open device
(self._port, bit) = self._parse_channel_string(port)
self._conn.open(vid,
pid,
interface=ord(self._port) - ord('A') + 1,
serial=self._serial)
logging.info(__name__ +
': using converter with serial #%s' % self._serial)
self._conn.set_bitmode(0xFF, Ftdi.BITMODE_BITBANG)
self._set_baudrate(baudrate)
# provide user interface
self.add_parameter('port',
type=types.StringType,
flags=Instrument.FLAG_GET)
#self.add_parameter('aliases', type=types.DictType, flags=Instrument.FLAG_GETSET)
self.add_function('digital_out')
self.add_function('digital_stream')
self.add_function('set_aliases')
self.add_function('get_aliases')
def __init__(self, deviceid):
"""
:rtype: object
"""
# self.input = queue.Queue(20)
self.packetCallback = None
self.errorCallback = None
self._commandLock = Lock()
self._packetReadEvent = Event()
self._startedEvent = Event()
self._stoppedEvent = Event()
self._run = True
self.device_id = deviceid
self._ftdi = Ftdi()
self.numScanners = 0
self.numRelays = 0
self.relaystatus = {}
self.version = "0.00"
self.model = "unknown"
self._unlockTimeouts = {}
self._parserState = ParserState.BEGIN
self._firstChar = ' '
self._body = bytearray()
# self.ftdi.open(vendor=0x0403,product=0x6001, serial=self.device)
self._ftdi.open_from_url(self.device_id)
self._ftdi.set_baudrate(57600)
self._backgroundThread = Thread(target=self.background)
self._backgroundThread.start()
self._otherThread = Thread(target=self.lock_watch_loop)
self._otherThread.start()
if not self._startedEvent.wait(3.0):
raise RuntimeError("Unable to startup board!")
else:
logger.log(logging.DEBUG, "Started up, disabling echo")
self.send_command('e', '0')
def get_device_info(fc, b, me):
if fc == 'I':
info = {i.split(':')[0]: i.split(':')[1] for i in b.split(',')}
self.model = info['m']
self.version = info['v']
self.numRelays = int(info['r'])
self.numScanners = int(info['s'])
for a in range(self.numRelays):
self._unlockTimeouts[a] = []
self.relaystatus[a] = False
self.packetCallback = get_device_info
logger.info("calling getting device info")
self.send_command('i', '')
logger.info("done interrogating")
self.packetCallback = None
def __init__(self, debug=False):
self.blaster = Ftdi()
self.virtual = True
self.blaster.LATENCY_MIN = 1
self.blaster.open(0x09FB, 0x6001)
self.blaster.write_data_set_chunksize(1)
self._last = None # Last deferred TDO bit
self.debug = debug
def setUpClass(cls):
FtdiTestCase.setUpClass()
if VirtLoader:
cls.loader = VirtLoader()
with open(cls.TEST_CONFIG_FILENAME, 'rb') as yfp:
cls.loader.load(yfp)
if cls.url == 'ftdi:///1':
ftdi = Ftdi()
ftdi.open_from_url(cls.url)
count = ftdi.device_port_count
ftdi.close()
def test_dump(self):
"""Check EEPROM full content."""
ftdi = Ftdi()
ftdi.open_from_url('ftdi:///1')
self._restore_eeprom(ftdi)
ref_data = bytes(list(range(256)))
size = len(ref_data)
data = ftdi.read_eeprom()
self.assertEqual(len(data), size)
self.assertEqual(ref_data, data)
ftdi.close()
def connect(self):
if self.dev.is_kernel_driver_active(0):
self.dev.detach_kernel_driver(0)
self._claim_dev()
self._ftdi = Ftdi()
self._ftdi.open_from_device(self.dev)
self._ftdi.set_bitmode(0xFF, Ftdi.BitMode.RESET)
self._ftdi.set_bitmode(0xFF, Ftdi.BitMode.SYNCFF)
def __init__(self, silent_clock=False, cs_count=4, turbo=True):
self._ftdi = Ftdi()
self._lock = Lock()
self._gpio_port = None
self._gpio_dir = 0
self._gpio_low = 0
self._wide_port = False
self._cs_count = cs_count
self._turbo = turbo
self._immediate = bytes((Ftdi.SEND_IMMEDIATE, ))
self._frequency = 0.0
self._clock_phase = False
def configure(self, url, direction=0, **kwargs):
"""Open a new interface to the specified FTDI device in bitbang mode.
:param str url: a FTDI URL selector
:param int direction: a bitfield specifying the FTDI GPIO direction,
where high level defines an output, and low level defines an
input
"""
for k in ('direction', ):
if k in kwargs:
del kwargs[k]
try:
ftdi = Ftdi()
ftdi.open_bitbang_from_url(url, direction=direction, **kwargs)
self._ftdi = ftdi
except IOError as ex:
raise GpioException('Unable to open USB port: %s' % str(ex))
self._direction = direction
with self._lock:
if (self._ftdi.has_wide_port and self._ftdi.has_mpsse):
# If this device supports the wide 16-bit GPIO port,
# must open as MPSSE to access the 16-bits. So close
# ftdi and re-open it as MPSSE.
try:
self._ftdi.close()
ftdi = Ftdi()
ftdi.open_mpsse_from_url(url,
direction=direction,
**kwargs)
self._ftdi = ftdi
except IOError as ex:
raise GpioException('Unable to open USB port: %s' %
str(ex))
self._wide_port = self._ftdi.has_wide_port
gpio_width = self._wide_port and 16 or 8
gpio_mask = (1 << gpio_width) - 1
self._gpio_mask = gpio_mask
def open_from_url(self, url, direction, **kwargs):
"""
"""
for k in ('direction',):
if k in kwargs:
del kwargs[k]
try:
ftdi = Ftdi()
ftdi.open_bitbang_from_url(url, direction=direction, **kwargs)
self._ftdi = ftdi
except IOError as e:
raise GpioException('Unable to open USB port: %s' % str(e))
self._direction = direction
def __init__(self, trst=False, frequency=3.0E6):
"""
trst uses the nTRST optional JTAG line to hard-reset the TAP
controller
"""
self._ftdi = Ftdi()
self._trst = trst
self._frequency = frequency
self.direction = (JtagController.TCK_BIT | JtagController.TDI_BIT
| JtagController.TMS_BIT |
(self._trst and JtagController.TRST_BIT or 0))
self._last = None # Last deferred TDO bit
self._write_buff = Array('B')
