Chapter 4
Function Descriptions
This chapter provides descriptions for the TMS330C55x DSPLIB functions.
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4.1 |
Arguments and Conventions Used . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . 4-2 |
4.2 |
DSPLIB Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . 4-3 |
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4-1
Arguments and Conventions Used
4.1 Arguments and Conventions Used
The following convention has been followed when describing the arguments for each individual function:
Table 4–1. Function Descriptions
Argument |
Description |
x,y |
argument reflecting input data vector |
r |
argument reflecting output data vector |
nx,ny,nr |
arguments reflecting the size of vectors x,y, and r respectively. In |
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functions where nx = nr = nr, only nx has been used. |
h |
Argument reflecting filter coefficient vector (filter routines only) |
nh |
Argument reflecting the size of vector h |
DATA |
data type definition equating a short, a 16-bit value representing a |
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Q15 number. Usage of DATA instead of short is recommended to |
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increase future portability across devices. |
LDATA |
data type definition equating a long, a 32-bit value representing a |
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Q31 number. Usage of LDATA instead of long is recommended to |
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increase future portability across devices. |
ushort |
Unsigned short (16 bit). You can use this data type directly, |
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because it has been defined in dsplib.h |
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4-2