c_can v0.3 Release

[j-c-cook]

A CAN hardware interface and file logging library written in C has been created. The library was developed to resolve issues similar to those described in #474.

Link to repository: https://github.com/j-c-cook/c-can

Background

Logging to binary log format (BLF) with the python-can package on the armv7l chip archetecture in embedded Linux user space resulted in dropped CAN frames (related to python-can/issues/474). When supplied with 500 messages per second at a bitrate of 250 kb/s (about a 57% bus load), the python-can package missed more than 13% of messages on the armv7l chip. (The issue was not associated with python-can itself, but rather a lack of computing resources to effectively run a daemon in Python on the low power CPU.) c-can has been developed to enable successful BLF CAN logging on the armv7l archetecture. Though, the library can be cross-compiled for any archetecture (granted there is a compiler available).

Features

c-can has been developed with a generic IO and bus interface that is modeled after python-can. The feature set is intended to be expanded to enable cross-platform usage.

The library is currently limited to the socketcan interface and BLF logging. The rollover logging script (scripts/r_logger) provides for continuous logging with no dropped CAN frames on an armv7l chip running embedded Linux.