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'the following ports: %s' % ports)
name = self.name()
version = self.hardware_version()
firmware = self.software_version()
serial_number_string = """"
try:
serial_number_string = "", S/N %03d"" % self.serial_number
except:
# Firmware does not support `serial_number` attribute.
pass
logger.info(""Connected to %s v%s (Firmware: %s%s)"" %
(name, version, firmware, serial_number_string))
logger.info(""Poll control board for series resistors and ""
""capacitance values."")
self._read_calibration_data()
try:
self.__aref__ = self._aref()
logger.info(""Analog reference = %.2f V"" % self.__aref__)
except:
# Firmware does not support `__aref__` attribute.
pass
# Check VGND for both analog channels
expected = 2 ** 10/2
v = {}
channels = [0, 1]
damaged = []
for channel in channels:
try:
v[channel] = np.mean(self.analog_reads(channel, 10))
logger.info(""A%d VGND = %.2f V (%.2f%% of Aref)"", channel,
self.__aref__ * v[channel] / (2 ** 10), 100.0 *
v[channel] / (2 ** 10))
# Make sure that the VGND is close to the expected value;
# otherwise, the op-amp may be damaged (expected error
# is <= 10%).
if np.abs(v[channel] - expected) / expected > .1:
damaged.append(channel)
except:
# Firmware does not support `__aref__` attribute.
break
# Scan I2C bus to generate list of connected devices.
self._i2c_scan()
if damaged:
# At least one of the analog input channels appears to be damaged.
if len(damaged) == 1:
msg = ""Analog channel %d appears"" % damaged[0]
else:
msg = ""Analog channels %s appear"" % damaged
raise BadVGND(msg + "" to be damaged. You may need to replace the ""
""op-amp on the control board."")
return self.RETURN_OK"
964,"def persistent_write(self, address, byte, refresh_config=False):
'''
Write a single byte to an address in persistent memory.
Parameters
----------
address : int
Address in persistent memory (e.g., EEPROM).
byte : int
Value to write to address.
refresh_config : bool, optional
Is ``True``, :meth:`load_config()` is called afterward to refresh
the configuration settings.
'''
self._persistent_write(address, byte)
if refresh_config:
self.load_config(False)"
965,"def persistent_read_multibyte(self, address, count=None, dtype=np.uint8):
'''
Read a chunk of data from persistent memory.
Parameters
----------
address : int
Address in persistent memory (e.g., EEPROM).
count : int, optional
Number of values to read.
If not set, read a single value of the specified :data:`dtype`.
dtype : numpy.dtype, optional
The type of the value(s) to read.
Returns
-------
dtype or numpy.array(dtype=dtype)
If :data:`count` is ``None``, return single value.
Otherwise, return array of values.
'''
nbytes = np.dtype(dtype).itemsize
if count is not None: