Google Git
Sign in
cos / mirrors / cros / chromiumos / platform2 / cdee985de3f3fd08bdb2e62fc7f668f8d22955a4 / . / smogcheck
tree: f1a3a02a7d814963817ddfc289d86c25c19a4c87 [path history] [tgz]
  1. include/
  2. common.mk ⇨ ../common-mk/common.mk
  3. .gitignore
  4. lib_smogcheck.c
  5. Makefile
  6. OWNERS
  7. README.md
  8. smogcheck.c
smogcheck/README.md

Smogcheck I2C Library

C library to communicate with I2C bus directly.

Notes:

  1. The goal of this module is to enable direct I/O operations on I2C bus with minimal overhead. Although i2c-tools has been made available in Chromium OS, it still carries much overhead (as revealed by strace).

  2. The original source code was posted to Linux Kernel Documentation (http://www.mjmwired.net/kernel/Documentation/i2c/dev-interface) and has been modified and adopted here. According to this source, there are two versions of i2c-dev.h, one distributed with the Linux kernel and the other with i2c-tools. This module depends on the kernel version.

  3. The included Makefile creates a C shared library object (.so file), which can then be imported into Python via ctypes for developing new Autotest test cases for I2C devices.

Source for i2c-tools: http://www.lm-sensors.org/wiki/I2CTools