National Instruments 320571-01 用户手册

6.  Compile, Assemble, and Link Your Custom Library

The last step in building a custom DSP Library is to compile, assemble, and link your custom library using the WE
DSP32C tools.  You must have installed those tools as described in the WE DSP32C Support Software Library User
Manual.  You must copy the file 

LIBLVDSP

.

a

 from the 

LIB

 directory in the stand-alone root directory to the 

LIB

directory of the WE DSP32C tools as set by the environment variable recommended in the WE DSP32C Support
Software Library User Manual.  Table 2-1 lists the files you need to build the custom NI-DSP example.

Table 2-1.  Files Required to Build the Custom DSP Library Example

makelib.bat

Batch file to build the custom library

gmaxmin.c

C source file

dspfncs.h

C include file generated by 

Dispatch

dispatch.s

Assembly file generated by 

Dispatch

NIDSPLNK

Modified linker command file

LIBLVDSP.a*

Archived library of object modules for the DSP Library functions

for LabVIEW

libc32c.a*
libap32c.a*
libm32c.a*

AT&T C library
AT&T Application library
AT&T Math library found in the 

LIB

 directory in the path set by

the environment variable

*  

All these archives must be in the 

LIB

 directory in your WE DSP32C tools directory.

Copy the file 

makelib.bat

 from the 

LIB

 directory.  This is a batch file that rebuilds the DSP Library file to

reflect the customization and changes needed.  You must enter in the memory map file names to this 

.bat

 file to

use in linking the DSP Library file, as well as the name of the output file for the DSP Library file.  The two memory
map files used for linking the DSP Library files that come with NI-DSP, 

dsp64.map

 and 

dsp.map

, are located in

the 

LIB

 directory.  Copy the memory map file that you will use to your current directory.  The memory map files

are used when linking the DSP Library files 

LV2200S.out

 and 

LV2200.out

, respectively.  You can rename

these files and move them to other directories.  If you want the driver to load this new DSP Library file, make sure
you run 

WDAQCONF

 as described in the section titled Board Configuration in Part 1, Getting Started with NI-DSP.

You should use one of the memory map files, 

dsp64.map

 or 

dsp.map

, as input to 

makelib.bat

.  If the size of

your library cannot be linked using the section sizes specified in these memory map files, you must edit these files
accordingly.  Refer to the WE DSP32C Support Software Library User Manual for more information.

To begin rebuilding the customized DSP Library, type the following command:

makelib 

memmap libfile

where

memmap 

is the name of the memory map file used

libfile

is the name of the desired DSP Library file name

For example,

makelib dsp64 LV2200S

Do not use the extension names 

.map

 and 

.out

 for the fields 

memmap

 and 

libfile

.