return self._count is not None
def __len__(self):
if self._count is not None:
return self._count
else:
raise TypeError(self.__class__.__name__ + " has no len")
BUTTON = 0
LED = 1
SPI_INTERRUPT = 6
I2C_INTERRUPT = 7
_pi_revision = revision()
if _pi_revision == 0:
# Not running on the Raspberry Pi, so define no-op pin banks
pins = PinBank(lambda p: p)
pi_broadcom_soc = pins
pi_header_1 = pins
else:
def by_revision(d):
return d[_pi_revision]
# Maps header pin numbers to SoC GPIO numbers
# See http://elinux.org/RPi_Low-level_peripherals
#
import sys
import posix
from fcntl import ioctl
from quick2wire.i2c_ctypes import *
from ctypes import create_string_buffer, sizeof, string_at
from quick2wire.board_revision import revision
assert sys.version_info.major >= 3, __name__ + " is only supported on Python 3"
default_bus = 1 if revision() > 1 else 0
class I2CMaster(object):
"""Performs I2C I/O transactions on an I2C bus.
Transactions are performed by passing one or more I2C I/O messages
to the transaction method of the I2CMaster. I2C I/O messages are
created with the reading, reading_into, writing and writing_bytes
functions defined in the quick2wire.i2c module.
An I2CMaster acts as a context manager, allowing it to be used in a
with statement. The I2CMaster's file descriptor is closed at
the end of the with statement and the instance cannot be used for
further I/O.
For example:
from quick2wire.i2c import I2CMaster, writing
with I2CMaster() as i2c:
def has_len(self):
return self._count is not None
def __len__(self):
if self._count is not None:
return self._count
else:
raise TypeError(self.__class__.__name__ + " has no len")
BUTTON = 0
LED = 1
SPI_INTERRUPT = 6
I2C_INTERRUPT = 7
_pi_revision = revision()
if _pi_revision == 0:
# Not running on the Raspberry Pi, so define no-op pin banks
pins = PinBank(lambda p: p)
pi_broadcom_soc = pins
pi_header_1 = pins
else:
def by_revision(d):
return d[_pi_revision]
# Maps header pin numbers to SoC GPIO numbers
# See http://elinux.org/RPi_Low-level_peripherals
#
import sys
from contextlib import closing
import posix
from fcntl import ioctl
from quick2wire.i2c_ctypes import *
from ctypes import create_string_buffer, sizeof, c_int, byref, pointer, addressof, string_at
from quick2wire.board_revision import revision
# assert sys.version_info.major >= 3, __name__ + " is only supported on Python 3"
default_bus = 1 if revision() > 1 else 0
class I2CMaster(object):
u"""Performs I2C I/O transactions on an I2C bus.
Transactions are performed by passing one or more I2C I/O messages
to the transaction method of the I2CMaster. I2C I/O messages are
created with the reading, reading_into, writing and writing_bytes
functions defined in the quick2wire.i2c module.
An I2CMaster acts as a context manager, allowing it to be used in a
with statement. The I2CMaster's file descriptor is closed at
the end of the with statement and the instance cannot be used for
further I/O.
For example:
from quick2wire.i2c import I2CMaster, writing
with I2CMaster() as i2c:
10: 15,
11: 17,
12: 18,
13: 21,
15: 22,
16: 23,
18: 24,
19: 10,
21: 9,
22: 25,
23: 11,
24: 8,
26: 7
}
if revision() > 1:
RaspberryPi_HeaderToSOC[3] = 2
RaspberryPi_HeaderToSOC[5] = 3
RaspberryPi_HeaderToSOC[13] = 27
RaspberryPi_GPIOToHeader = [11, 12, 13, 15, 16, 18, 22, 7]
def gpio_to_soc(gpio_pin_number):
if 0 <= gpio_pin_number < 8:
return header_to_soc(RaspberryPi_GPIOToHeader[gpio_pin_number])
else:
raise ValueError(str(gpio_pin_number)+" is not a valid GPIO pin")
def header_to_soc(header_pin_number):