def __init__(self, slave=None, family=0, extra=None):
Bus.__init__(self, "ONEWIRE",
"/sys/bus/w1/devices/w1_bus_master1/w1_master_slaves",
os.O_RDONLY)
if self.fd > 0:
os.close(self.fd)
self.fd = 0
self.family = family
if slave != None:
addr = slave.split("-")
if len(addr) == 1:
self.slave = "%02x-%s" % (family, slave)
elif len(addr) == 2:
prefix = int(addr[0], 16)
if family > 0 and family != prefix:
raise Exception(
"1-Wire slave address %s does not match family %02x" %
(slave, family))
self.slave = slave
else:
devices = self.deviceList()
if len(devices) == 0:
raise Exception("No device match family %02x" % family)
self.slave = devices[0]
loadExtraModule(extra)
def __init__(self, chip=0, mode=0, bits=8, speed=0):
Bus.__init__(self, "SPI", "/dev/spidev0.%d" % chip)
self.chip = chip
val8 = array.array('B', [0])
val8[0] = mode
if fcntl.ioctl(self.fd, SPI_IOC_WR_MODE, val8):
raise Exception("Cannot write SPI Mode")
if fcntl.ioctl(self.fd, SPI_IOC_RD_MODE, val8):
raise Exception("Cannot read SPI Mode")
self.mode = struct.unpack('B', val8)[0]
assert(self.mode == mode)
val8[0] = bits
if fcntl.ioctl(self.fd, SPI_IOC_WR_BITS_PER_WORD, val8):
raise Exception("Cannot write SPI Bits per word")
if fcntl.ioctl(self.fd, SPI_IOC_RD_BITS_PER_WORD, val8):
raise Exception("Cannot read SPI Bits per word")
self.bits = struct.unpack('B', val8)[0]
assert(self.bits == bits)
val32 = array.array('I', [0])
if speed > 0:
val32[0] = speed
if fcntl.ioctl(self.fd, SPI_IOC_WR_MAX_SPEED_HZ, val32):
raise Exception("Cannot write SPI Max speed")
if fcntl.ioctl(self.fd, SPI_IOC_RD_MAX_SPEED_HZ, val32):
raise Exception("Cannot read SPI Max speed")
self.speed = struct.unpack('I', val32)[0]
assert((self.speed == speed) or (speed == 0))
def __init__(self, slave):
self.channel = 0
if BOARD_REVISION > 1:
self.channel = 1
Bus.__init__(self, "I2C", "/dev/i2c-%d" % self.channel)
self.slave = slave
if fcntl.ioctl(self.fd, I2C_SLAVE, self.slave):
raise Exception("Error binding I2C slave 0x%02X" % self.slave)
def __init__(self, device="/dev/ttyAMA0", baudrate=9600):
if not device.startswith("/dev/"):
device = "/dev/%s" % device
if isinstance(baudrate, str):
baudrate = int(baudrate)
aname = "B%d" % baudrate
if not hasattr(termios, aname):
raise Exception("Unsupported baudrate")
self.baudrate = baudrate
Bus.__init__(self, "UART", device, os.O_RDWR | os.O_NOCTTY)
fcntl.fcntl(self.fd, fcntl.F_SETFL, os.O_NDELAY)
#backup = termios.tcgetattr(self.fd)
options = termios.tcgetattr(self.fd)
# iflag
options[0] = 0
# oflag
options[1] = 0
# cflag
options[2] |= (termios.CLOCAL | termios.CREAD)
options[2] &= ~termios.PARENB
options[2] &= ~termios.CSTOPB
options[2] &= ~termios.CSIZE
options[2] |= termios.CS8
# lflag
options[3] = 0
speed = getattr(termios, aname)
# input speed
options[4] = speed
# output speed
options[5] = speed
termios.tcsetattr(self.fd, termios.TCSADRAIN, options)
def __init__(self, device="/dev/ttyAMA0", baudrate=9600):
if not device.startswith("/dev/"):
device = "/dev/%s" % device
if isinstance(baudrate, str):
baudrate = int(baudrate)
aname = "B%d" % baudrate
if not hasattr(termios, aname):
raise Exception("Unsupported baudrate")
self.baudrate = baudrate
Bus.__init__(self, "UART", device, os.O_RDWR | os.O_NOCTTY)
fcntl.fcntl(self.fd, fcntl.F_SETFL, os.O_NDELAY)
#backup = termios.tcgetattr(self.fd)
options = termios.tcgetattr(self.fd)
# iflag
options[0] = 0
# oflag
options[1] = 0
# cflag
options[2] |= (termios.CLOCAL | termios.CREAD)
options[2] &= ~termios.PARENB
options[2] &= ~termios.CSTOPB
options[2] &= ~termios.CSIZE
options[2] |= termios.CS8
# lflag
options[3] = 0
speed = getattr(termios, aname)
# input speed
options[4] = speed
# output speed
options[5] = speed
termios.tcsetattr(self.fd, termios.TCSADRAIN, options)
def __init__(self, slave=None, family=0, extra=None):
Bus.__init__(self, "ONEWIRE", "/sys/bus/w1/devices/w1_bus_master1/w1_master_slaves", os.O_RDONLY)
if self.fd > 0:
os.close(self.fd)
self.fd = 0
self.family = family
if slave != None:
addr = slave.split("-")
if len(addr) == 1:
self.slave = "%02x-%s" % (family, slave)
elif len(addr) == 2:
prefix = int(addr[0], 16)
if family > 0 and family != prefix:
raise Exception("1-Wire slave address %s does not match family %02x" % (slave, family))
self.slave = slave
else:
devices = self.deviceList()
if len(devices) == 0:
raise Exception("No device match family %02x" % family)
self.slave = devices[0]
loadExtraModule(extra)
def write(self, data):
Bus.write(self, data)
def read(self):
if self.available() > 0:
return Bus.read(self, self.available()).decode()
return ""
