Etnies Icon Fill Zip Basic more. There's a i2c-dev header in the Linux userspace. I can't remember if this header is shipped with the lm-sensors package, or if it will need to be installed from source. I'd check your distro's package repository. Has a nice article covering preparation & usage.

#include /* Including i2c-dev header will allow the following I2C SMBus functions - i2c_smbus_access - i2c_smbus_write_quick - i2c_smbus_read_byte - i2c_smbus_write_byte - i2c_smbus_read_byte_data - i2c_smbus_write_byte_data - i2c_smbus_read_word_data - i2c_smbus_write_word_data - i2c_smbus_process_call - i2c_smbus_read_block_data - i2c_smbus_write_block_data - i2c_smbus_read_i2c_block_data - i2c_smbus_write_i2c_block_data - i2c_smbus_block_process_call */ The source code for i2c-tools () are good examples in C. I've seen a few simple C++ libraries wrapping these functions.

I'd recommend authoring your own library to suit your needs. Other great examples can be found on Github, like this library. As mentioned by emcconville there is a i2c-dev header in the Linux userspace ( #include ). Furthermore you need a character device to read from.

Hi, I'm working with the i2c2 from the beagle board, and I wrote a program for user-space, the header used is 'i2c-dev.h' from lm sensors. The hardware I use requires. If you get a warning about I2C_SLAVE not being defined, you may need to include both and (The location has changed in newer kernels vs. Older kernels and the above example is for newer) Tested Devices. AD7991 Quad Input ADC. Utilized with Sharp GP2D12 IR Range Sensors. (That link is broken. Using the I2C device library is actually. Make sure the desired I2C implementation is selected in I2Cdev.h This will not likely change between your. Please note that 22 there are two files named 'i2c-dev.h' out there, one is distributed 23 with the Linux kernel and is meant to be included from kernel 24 driver code, the other one is distributed with i2c-tools and is 25 meant to be included from user-space programs.

This can be done by loading the correct modules. I2c_bcm2708 for the low level driver and i2c-dev for generating the character decives for the busses. Sudo modprobe -r i2c_bcm2708 sudo modprobe i2c_bcm2708 baudrate=32000 for loading them on the fly. Sudo sh -c 'echo 'i2c-dev' >>/etc/modules' sudo sh -c 'echo 'options i2c_bcm2708 baudrate= n' >/etc/modprobe.d/custom.conf and unblacklist i2c_bcm2708 in /etc/modprobe.d/raspi-blacklist.conf to make /dev/i2c-0 and /dev/i2c-1 show up permanently. From now on you can follow the del maestro himself. I prefer this method because it is platformagnostic. Your can use linux/i2c-dev.h with other devices too, as long as there exists a I²C driver.

WiringPi is bound to the rPi. Regards UPDATE: This information is deprecated. Check for the use of device trees.