RAM 6.0 BUX II Series Guía de usuario descargar pdf (Pagina 132)

VxWorks

BSP Developer’s Guide, 6.0

124

If you are not sure if a particular block of code is included in the final image, you

can use the #warning macro to determine what components are included at

compile time. When the compiler’s preprocessor encounters the #warning macro

in an area of code included in the compilation, it prints the message following the

the #warning keyword.

For example, to see if memory auto-sizing is enabled, the code in

sysPhysMemTop( ) in sysLib.c can include the following:

#ifdef LOCAL_MEM_AUTOSIZE

/* To Do Auto-Sizeing stuff */

/* This BSP does not support auto-sizing */

#warning We should NOT do auto-sizing

#else /* not LOCAL_MEM_AUTOSIZE */

/* Don’t do auto-sizing, use defined constants. */

#warning We should be here.

sysPhysMemSize = (char *)(LOCAL_MEM_LOCAL_ADRS + LOCAL_MEM_SIZE);

#endif /* LOCAL_MEM_AUTOSIZE */

Upon building the code, you may see output similar to the following:

ccppc -mcpu=603 -mstrict-align -ansi -O2 -fvolatile -fno-builtin \

-Wall -I/h -I. -IC:\T22\ppc\target\config\all \

-IC:\T22\ppc\target/h -IC:\T22\ppc\target/src/config \

-IC:\T22\ppc\target/src/drv -DCPU=PPC603 -DTOOL_FAMILY=gnu \

-DTOOL=gnu-c sysLib.c

sysLib.c:528: warning: #warning We should be here.

This method is helpful when you are not sure if a component is being included or

not. Another option is to generate the post-processed compiler output and

examine it (for more information on this method, see Post-Processed Compiler

Output, p.123). This is helpful to confirm that an expected include file is being

picked up before another include file.

NOTE: You must set up the VxWorks environment variables in order to run the

tools specified below. The easiest way to do this is to use the configuration script

created during your installation. For VxWorks 6.0, this is the wrEnv script. For

previous versions of VxWorks, this is the torVars script. The configuration script is

located in installDir/host/hostType/bin for all VxWorks versions.

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RAM 6.0 BUX II Series Guía de usuario Pagina 132