VxWorks / Tornado II FAQ

Add memDrv as a component

I wanted to use the memory driver to store some configuration files on my target. According to the manual I could use the memDrv functions to do this. But I could not configure my kernel in a way that the memDrv library was included, so I had to add the memory driver as a component to the configuration.
Following the instructions on the previous page I made the following decisions:

The define for this function is INCLUDE_MEMDRV.
This module should be added to the IO system components folder.
According to the manual the startup function (memDrv) should be called from usrRoot, so INCLUDE_MEMDRV should be added to InitGroup usrRoot. Later I decided to add INCLUDE_MEMDRV to usrIosExtraInit, because INCLUDE_RAMDRV was also used here. This function is called from usrRoot, so it is still according to the manual.
There are no configurable items to be defined.

Create the file 50memDrv.cdf in the directory target\config\comps\vxWorks. This file contains:

-----------------------------------
/*
 *  File:       50memDrv.cdf
 *
 *  Description:
 *
 *      This file defines the memDrv component
 *
 *  History:
 *      030899 Creation,     J.A. Borkhuis
 *      270600 Changed according to WRS standards
 */

Component INCLUDE_MEMDRV {
	NAME		Memory-file disk driver
	SYNOPSIS	Pseudo memory device driver
	_CHILDREN	FOLDER_IO_SYSTEM
	MODULES         memDrv.o
	INIT_RTN	memDrv ();
	_INIT_ORDER	usrIosExtraInit
	HDR_FILES	memDrv.h
}
-----------------------------------

This file adds the memdrv component to the IO system folder and when selected the init function will be called from within the usrIosExtraInit function in prjConfig.c