Where is i2c_smbus_xxxx_xxx() functions?

Dear forum,

I have now verified my I2C devices using Python.
I need to re-code them in C.

I find i2c driver dokumented here:
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/tree/Documentation/i2c/dev-interface

The documentation complies with my 3.8.13-bone67 compiled and installed kernel source (KERNEL/drivers/i2c/i2c-core.c)

Problem:
No file in /usr/include/* contains the prototypes for the documented i2c_smbus_xxxx_xxxx() functions.

I can open/read/write to the /dev/i2c-x devices using standard read(), write() and ioctl(), but I find no higher level i2c functions.

What is my problem?

Please advice.
Best regards
Terje Froysa

Hi:
U need to include the file that define i2c_smbus_xxxx_xxxx() functions. Maybe u can try add following codes

#include <linux/i2c-dev.h>

Terje Froysa於 2014年11月25日星期二UTC+8上午12時37分10秒寫道: