def open(self, use_10bit_address=False):
""" I2CDev.open(use_10bit_address=False) -> None
Initialize the I2C bus interface.
If use_10bit_address=True the bus will use 10-bit slave addresses
instead of 7-bit addresses.
"""
if self._is_open: return
if self.bus_num == 1 and not cape_manager.isLoaded("BB-I2C1"):
# I2C2 is already enabled for reading cape EEPROMs,
# so only need to load overlay for I2C1
cape_manager.load("BB-I2C1", auto_unload=False)
bbio.common.delay(10)
# Make sure it initialized correctly:
if not cape_manager.isLoaded("BB-I2C1"):
raise IOError("could not enable I2C1")
# Detect bus number:
# (since I2C2 is always enabled at boot, it's kernel assigned
# bus number will always be the same, and I2C1 will always be
# the next consecutive bus number, so this isn't actually
# required)
for i in glob.glob("/sys/bus/i2c/devices/i2c-*"):
path = os.path.realpath(i)
module_addr = int(path.split("/")[4].split(".")[0], 16)
if module_addr == I2C_BASE_ADDRESSES[self.bus_num]:
self.bus_num = int(path.split("/")[5][-1])
break
super(I2CBus, self).open(use_10bit_address=use_10bit_address)
self._is_open = True
def open(self, use_10bit_address=False):
""" I2CDev.open(use_10bit_address=False) -> None
Initialize the I2C bus interface.
If use_10bit_address=True the bus will use 10-bit slave addresses
instead of 7-bit addresses.
"""
if self._is_open: return
if self.bus_num == 1 and not cape_manager.isLoaded("BB-I2C1"):
# I2C2 is already enabled for reading cape EEPROMs,
# so only need to load overlay for I2C1
cape_manager.load("BB-I2C1", auto_unload=False)
bbio.common.delay(10)
# Make sure it initialized correctly:
if not cape_manager.isLoaded("BB-I2C1"):
raise IOError("could not enable I2C1")
# Detect bus number:
# (since I2C2 is always enabled at boot, it's kernel assigned
# bus number will always be the same, and I2C1 will always be
# the next consecutive bus number, so this isn't actually
# required)
for i in glob.glob("/sys/bus/i2c/devices/i2c-*"):
path = os.path.realpath(i)
module_addr = int(path.split("/")[4].split(".")[0], 16)
if module_addr == I2C_BASE_ADDRESSES[self.bus_num]:
self.bus_num = int(path.split("/")[5][-1])
break
super(I2CBus, self).open(use_10bit_address=use_10bit_address)
self._is_open = True
def open(self): overlay = 'BB-SPIDEV%i' % (self.bus-1) cape_manager.load(overlay, auto_unload=False) bbio.common.delay(250) # Give driver time to load assert cape_manager.isLoaded(overlay), "Could not load SPI overlay" super(SPIBus, self).open() # Initialize to default parameters: self.setCSActiveLow(0) self.setBitsPerWord(0, 8) self.setMaxFrequency(0, 8000000) self.setClockMode(0, 0)
def open(self):
overlay = "BB-SPIDEV%i" % (self.bus)
cape_manager.load(overlay, auto_unload=False)
bbio.common.delay(250) # Give driver time to load
assert cape_manager.isLoaded(overlay), "Could not load SPI overlay"
for i in glob.glob("/sys/bus/spi/devices/*.0"):
path = os.path.realpath(i)
module_addr = int(path.split("/")[4].split(".")[0], 16)
if module_addr == SPI_BASE_ADDRESSES[self.bus]:
self.bus = int(path.split("/")[6][-1])
break
super(SPIBus, self).open()
# Initialize to default parameters:
self.setCSActiveLow(0)
self.setBitsPerWord(0, 8)
self.setMaxFrequency(0, 8000000)
self.setClockMode(0, 0)
def open(self):
overlay = "BB-SPIDEV%i" % (self.bus)
cape_manager.load(overlay, auto_unload=False)
bbio.common.delay(250) # Give driver time to load
assert cape_manager.isLoaded(overlay), "Could not load SPI overlay"
for i in glob.glob("/sys/bus/spi/devices/*.0"):
path = os.path.realpath(i)
module_addr = int(path.split("/")[4].split(".")[0], 16)
if module_addr == SPI_BASE_ADDRESSES[self.bus]:
self.bus = int(path.split("/")[6][-1])
break
super(SPIBus, self).open()
# Initialize to default parameters:
self.setCSActiveLow(0)
self.setBitsPerWord(0, 8)
self.setMaxFrequency(0, 8000000)
self.setClockMode(0, 0)
