RAM 6.0 BUX II Series Betriebsanweisung PDF herunterladen (Seite 37)

2 Overview of a BSP

2.3 Components of a BSP

#include "sysIOPort.c"

This means that the BSP contains a source file sysIOPort.c that does not have a

corresponding object module. Instead of a separate object module, that object code

is included in sysLib.o.

Another source of derived files is the target.ref (or target.nr) documentation file in

the BSP directory. This file is maintained in an unprocessed form that is difficult to

read. To process the target.ref file, issue a make man command in the BSP

directory. This command results in a new HTML file that is suitable for online

viewing. For more information on the HTML output or the target.ref file, see

B. Documentation Guidelines.

Other objects derived from files in the BSP directory are related to the project

facility. Each time a bootable project is created from a BSP directory, a projName.wpj

file is created. A project also contains several derived source and header files

including a makefile for use with the project facility, a prjObjs.lst file containing a

list of all the object modules used for the build, and directories containing the

object modules and VxWorks images themselves. Note that although these objects

are derived from information in the BSP directory, the objects themselves are not

located in the BSP directory.

2.3.3 Required Data Variables

You must declare and initialize the following data variables in your BSP.

sysPhysMemDesc[ ]

PHYS_MEM_DESC sysPhysMemDesc[ ]

The sysPhysMemDesc[ ] array holds descriptions of different memory ranges on

the board. This is used by several vxWorks libraries, including the memory

management subsystem. This array must be initialized by the BSP. Typically, it is

sysPhysMemDesc[ ] Determines physical memory layout

sysPhysMemDescNumEnt Number of entries in sysPhysMemDesc[ ]

sysBootLine Address of boot line

sysExcMsg Catastrophic message area

sysFlags Boot flags

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RAM 6.0 BUX II Series Betriebsanweisung Seite 37