National Instruments Car Stereo System 320571-01 用户手册

short DSP_Sqrt (float * x, long n, float * y)
short DSP_Sub (float * x, float * y, long n, flaot * z)
short DSP_Subset (float * x, long n, long index, long length, float * y)
short DSP_Sum (float * x, long n, float * sum)
short DSP_Unwrap (float * x, long n, float * y)
short DSP_To Polar (float * x, float * y, long n, float * mag,  

float * phase)

short DSP_To Rect (float * mag, float * phase, long n, float * x,  

float * y)

Memory Management Data Transfer

void * Alloc_Mem (long numbytes)
short DSP_CopyMem

(void * Source, void * Destination, long type, long
count)

short Free_Mem (long ptr)

Some low-level data acquisition NI-DSP functions are also available for you to call in an application on the DSP
board.  You can use these low-level data acquisition functions to develop acquisition and waveform generation
applications that occur on the DSP board, such as acquiring and sending data over the input and output channels.  If
you use any of the low-level data acquisition functions in your custom functions, please include the 

dspdaq.h

 file

in your program.  

dspdaq.h

 contains all the prototypes of functions and the data structures that the data

acquisition functions use.  You can find this header file in the 

LIB

 directory.  For more information about these

functions, refer to Part 4, Chapter 5, Data Acquisition Functions for the AT-DSP2200, in the NI-DSP Software
Reference Manual for DOS/LabWindows.  All of the information in that chapter applies to the NI-DSP software for
LabVIEW for Windows.