BSP and Device Driver Development Guide
At system initialization, the discrete I/O driver's initialization entry point will be invoked. As part of initialization, the driver will perform whatever board initializatin is required and then set all outputs to their configured initial state.
The discrete I/O driver may register a device name for bitfields of particular interest to the system. Normally this will be restricted to the names of each word and, if the driver supports it, an "all words".
BSP and Device Driver Development Guide
Copyright © 1988-2007OAR Corporation