def ouvrirPort(port):
# Création du context
ftdiContext = ftdi.ftdi_context()
# Initialisation du context
if ftdi.ftdi_init(ftdiContext) < 0:
raise IOError("Echec de l'initialisation")
# Ouverture du port
ret = ftdi.ftdi_usb_open(ftdiContext, 0x0403, 0x6001)
if (ret) < 0:
raise IOError("Impossible d'ouvrir le port " + hex(port) + " : " + repr(ret) + "(" + ftdi.ftdi_get_error_string(ftdiContext) + ")")
# Fixer le debit à 1200 bit/s => 150 car/s (8 bits/car)
ret = ftdi.ftdi_set_baudrate(ftdiContext, 1200)
if (ret) < 0:
raise IOError("Impossible de fixer le baudrate pour le port " + hex(port) + " : " + repr(ret) + "(" + ftdi.ftdi_get_error_string(ftdiContext) + ")")
# Pour une obscure raison pour le moment il faut mettre ftdi.BITS_8
# et non ftdi.BITS_7 comme indiqué dans la spec pour que cela fonctionne ???
ret = ftdi.ftdi_set_line_property(ftdiContext, ftdi.BITS_8, ftdi.EVEN, ftdi.STOP_BIT_1)
# Activation du compteur 1 et lecture de qqes trames
ret = ftdi.ftdi_set_bitmode(ftdiContext, port, ftdi.BITMODE_CBUS);
# Fixer le timeout de lecture
ftdiContext.usb_read_timeout = 50000;
return ftdiContext
def init(self):
""" Init ftdi com.
"""
# Create ftdi context
self._log.info("Try to Create ftdi context")
self.__ftdic = ftdi.ftdi_context()
if self.__ftdic is None:
self._log.error("Can't create ftdi context")
raise FtdiError("Can't create ftdi context")
# Init ftdi context
err = ftdi.ftdi_init(self.__ftdic)
if err < 0:
self._log.error("Can't init ftdi context (%d, %s)" % (err, ftdi.ftdi_get_error_string(self.__ftdic)))
raise FtdiError("Can't init ftdi context (%d, %s)" % (err, ftdi.ftdi_get_error_string(self.__ftdic)))
# Open port
self._log.info("Try to open ftdi port")
err = ftdi.ftdi_usb_open(self.__ftdic, USB_VENDOR, USB_PRODUCT)
if err < 0:
self._log.error("Can't open usb (%d, %s)" % (err, ftdi.ftdi_get_error_string(self.__ftdic)))
raise FtdiError("Can't open usb (%d, %s)" % (err, ftdi.ftdi_get_error_string(self.__ftdic)))
err = ftdi.ftdi_set_baudrate(self.__ftdic, BAUD_RATE)
if err < 0:
self._log.error("Can't set baudrate (%d, %s)" % (err, ftdi.ftdi_get_error_string(self.__ftdic)))
raise FtdiError("Can't set baudrate (%d, %s)" % (err, ftdi.ftdi_get_error_string(self.__ftdic)))
# Because of the usb interface, must use 8 bits transmission data, instead of 7 bits
err = ftdi.ftdi_set_line_property(self.__ftdic, ftdi.BITS_8, ftdi.EVEN, ftdi.STOP_BIT_1)
if err < 0:
self._log.error("Can't set line property (%d, %s)" % (err, ftdi.ftdi_get_error_string(self.__ftdic)))
raise FtdiError("Can't set line property (%d, %s)" % (err, ftdi.ftdi_get_error_string(self.__ftdic)))
def guessResetDirection(self, h):
if (self.resetValue is None or self.nBootValue is None):
CBUS_2 = 4
CBUS_0 = 1
RESET_LINE = CBUS_2
GPIO5_LINE = CBUS_0
resetLow = ((RESET_LINE << 4) | 0)
resetHigh = ((RESET_LINE << 4) | RESET_LINE)
GPIO5Low = ((GPIO5_LINE << 4) | 0)
GPIO5High = ((GPIO5_LINE << 4) | GPIO5_LINE)
h.usb_write_timeout = 1000
h.usb_read_timeout = 1000
ret = ftdi.ftdi_set_baudrate(h, 115200)
ret = (ret + ftdi.ftdi_setflowctrl(h, ftdi.SIO_DISABLE_FLOW_CTRL))
ret = (ret + ftdi.ftdi_set_line_property(
h, ftdi.BITS_8, ftdi.STOP_BIT_1, ftdi.NONE))
for i in range(2):
if (i % 2) == 0:
resetValue = resetHigh
nbootValue = GPIO5High
else:
resetValue = resetLow
nbootValue = GPIO5Low
ftdi.ftdi_set_bitmode(h, resetValue, ftdi.BITMODE_CBUS)
time.sleep(0.10000000000000001)
ftdi.ftdi_set_bitmode(h, nbootValue, ftdi.BITMODE_CBUS)
time.sleep(0.10000000000000001)
ftdi.ftdi_set_bitmode(h, 0, ftdi.BITMODE_CBUS)
ftdi.ftdi_usb_purge_rx_buffer(h)
ftdi.ftdi_usb_purge_tx_buffer(h)
ftdi.ftdi_write_data(h, struct.pack('B', 127), 1)
startTime = time.time()
inbuff = '\x00'
nbyte_rcvd = 0
while (nbyte_rcvd == 0 and (time.time() - startTime) < 1):
nbyte_rcvd = ftdi.ftdi_read_data(h, inbuff, 1)
continue
if nbyte_rcvd > 0:
reply = struct.unpack('B', inbuff)
if (reply[0]) == 121:
self.resetValue = resetValue
self.nBootValue = nbootValue
break
else:
continue
continue
return (self.resetValue, self.nBootValue)
def guessResetDirection(self, h):
if (self.resetValue is None or self.nBootValue is None):
CBUS_2 = 4
CBUS_0 = 1
RESET_LINE = CBUS_2
GPIO5_LINE = CBUS_0
resetLow = ((RESET_LINE << 4) | 0)
resetHigh = ((RESET_LINE << 4) | RESET_LINE)
GPIO5Low = ((GPIO5_LINE << 4) | 0)
GPIO5High = ((GPIO5_LINE << 4) | GPIO5_LINE)
h.usb_write_timeout = 1000
h.usb_read_timeout = 1000
ret = ftdi.ftdi_set_baudrate(h, 115200)
ret = (ret + ftdi.ftdi_setflowctrl(h, ftdi.SIO_DISABLE_FLOW_CTRL))
ret = (ret + ftdi.ftdi_set_line_property(h, ftdi.BITS_8, ftdi.STOP_BIT_1, ftdi.NONE))
for i in range(2):
if (i % 2) == 0:
resetValue = resetHigh
nbootValue = GPIO5High
else:
resetValue = resetLow
nbootValue = GPIO5Low
ftdi.ftdi_set_bitmode(h, resetValue, ftdi.BITMODE_CBUS)
time.sleep(0.10000000000000001)
ftdi.ftdi_set_bitmode(h, nbootValue, ftdi.BITMODE_CBUS)
time.sleep(0.10000000000000001)
ftdi.ftdi_set_bitmode(h, 0, ftdi.BITMODE_CBUS)
ftdi.ftdi_usb_purge_rx_buffer(h)
ftdi.ftdi_usb_purge_tx_buffer(h)
ftdi.ftdi_write_data(h, struct.pack('B', 127), 1)
startTime = time.time()
inbuff = '\x00'
nbyte_rcvd = 0
while (nbyte_rcvd == 0 and (time.time() - startTime) < 1):
nbyte_rcvd = ftdi.ftdi_read_data(h, inbuff, 1)
continue
if nbyte_rcvd > 0:
reply = struct.unpack('B', inbuff)
if (reply[0]) == 121:
self.resetValue = resetValue
self.nBootValue = nbootValue
break
else:
continue
continue
return (self.resetValue, self.nBootValue)
