RAM 6.0 BUX II Series Betriebsanweisung PDF herunterladen (Seite 29)

2 Overview of a BSP

2.3 Components of a BSP

files, a custom usrAppInit.c file, another makefile for use with the project facility,

and directories containing object modules.

In addition to the BSP directory, there are several other directories that contain files

related to the BSP.

The target/config/all directory contains some source and header files that are used

by the BSPs for default configuration. The files in this directory should never be

changed. If changes to a file are necessary, copy the file to the BSP directory and

make changes to the local copy. There is a mechanism in the makefile that allows

you to use the local copy instead of the common version. The macros

USRCONFIG,

BOOTCONFIG, BOOTINIT, and DATASEGPAD refer to the files usrConfig.c,

bootConfig.c, bootInit.c, and dataSegPad.c, respectively, and allow you to

designate a private copy of each file for use in the BSP. For example, to use a private

version of usrConfig.c, set the macro

USRCONFIG to usrConfig.c in Makefile as

follows:

USRCONFIG = usrConfig.c

2.3.1 Source and Include Files

BSP routines are contained in a number of C and assembly files that you may need

to modify or create. These routines are located in a relatively small number of

source files. This section provides a list of these source files as well as a detailed

description of each file. Each file is also documented extensively in the reference

and template BSPs (see the code comments in each file).

The following files, in target/config/bspname, may need to be created or modified:

README Documentation file

Makefile Makefile for building the BSP

config.h Header file for configuring the OS

bspname.h Header file for non-configurable definitions

romInit.s This file contains the romInit( ) routine and any

subroutines used by romInit( ).

sysALib.s If required, this file contains assembly routines that are not

part of romInit( ).

sysLib.c This file contains the sysHwInit( ) routine and additional C

language routines specific to the target hardware.

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RAM 6.0 BUX II Series Betriebsanweisung Seite 29