2.2. Logging Messages

VxWorks provides a logging task that can print messages to the console device. The function that communicates with this task is logMsg(). This function should be used for all diagnostic messages rather than printf(), for several reasons:

• It queues the message to the logger task instead of doing I/O. By queueing the request, the function will never block, so it is safe to use in an interrupt routine.
• VxWorks supplies some "hooks" so the logging system can be extended easier than printf() can.

2.2.1. Simplifying logMsg() with macros

2.2.1.1. Example

2.2.2. Debug Messages

2.2.2.1. Example

2.2.3. Function Reference

2.2.3.1. dbgMsg()

2.2.3.2. exitLog()

2.2.3.3. initLog()

2.2.3.4. logMsg()

2.2.3.5. reattachLog()