def read(self, n):
buf = "\x00"*n
r = ftdi.ftdi_read_data(self.ft_ctx, buf, n)
if r >= 0:
return buf[:r]
else:
raise RuntimeError("Error reading (%d)" % r)
def read(self, n):
buf = "\x00" * n
r = ftdi.ftdi_read_data(self.ft_ctx, buf, n)
if r >= 0:
return buf[:r]
else:
raise RuntimeError("Error reading (%d)" % r)
def flush_input(self):
while len(self.dest) and not self.hw_error:
data = chr(0)*len(self.dest)
ret = ftdi.ftdi_read_data(self.ftdic, data, len(self.dest))
if ret < 0:
self.hw_error = ret
self.i2c_error = True
break
for b in data[:ret]:
self.dest.pop(0)(ord(b))
def flush_input(self):
while len(self.dest) and not self.hw_error:
data = chr(0) * len(self.dest)
ret = ftdi.ftdi_read_data(self.ftdic, data, len(self.dest))
if ret < 0:
self.hw_error = ret
self.i2c_error = True
break
for b in data[:ret]:
self.dest.pop(0)(ord(b))
def readOne(self):
""" read 1 char from usb
"""
buf = ' '
err = ftdi.ftdi_read_data(self.__ftdic, buf, 1)
if err < 0:
self._log.error("Can't read data (%d, %s)" % (err, ftdi.ftdi_get_error_string(self.__ftdic)))
self.shutdown()
raise FtdiError("Can't read data (%d, %s)" % (err, ftdi.ftdi_get_error_string(self.__ftdic)))
if err:
c = unichr(ord(buf) % 0x80) # Clear bit 7
return c
else:
return None
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)
def getTrame(ftdiContext): # Récupérer une trame buf=' ' startCapture = False stopCapture = False trame = [] while not stopCapture: f = ftdi.ftdi_read_data(ftdiContext, buf, 0x1) if f != 0: ordBuf = ord(buf) & 0x07f if ordBuf == CAR_STX: startCapture = True if startCapture and ordBuf == CAR_ETX: stopCapture = True if startCapture: trame.append(ordBuf) time.sleep(0.01) return trame;
