import os
import logging
import struct
+import fcntl
from ctypes import *
from time import sleep
DEBUG=0
+I2C_FILENAME = "/dev/i2c-2"
logger = logging.getLogger(__name__)
class i2c:
logger.warning("Error: (%s) I2C blocked %fs by %s!", parent, count*0.001, parent_owner)
i2c.__parent_owner = inspect.stack()[1]
i2c.__single = True
- self.dev = i2c.libc.open("/dev/i2c-2", os.O_RDWR)
+ self.dev = i2c.libc.open(I2C_FILENAME, os.O_RDWR)
if self.dev < 0:
raise IOError("open")
+ fcntl.flock(self.dev, fcntl.LOCK_EX)
err = i2c.libc.ioctl(self.dev, i2c.I2C_SLAVE, addr>>1)
if err < 0:
raise IOError("ioctl")