Texas Instruments C28 Series User Manual

Function Descriptions
3.17 Absolute Value of a Complex Vector
Description:
This module computes the absolute value of a complex vector. If N is even, use
abs_SP_CV_2() for better performance.
Y [i] =
p
(X
re
[i]
2
+ X
im
[i]
2
)
Header File:
FPU.h
Declaration:
void abs_SP_CV(float32
*
y, const complex_float
*
x, const Uint16 N)
Usage:
abs_SP_CV(x, y, N);
float32 *y
output array
complex_float *x
input array
Uint16 N
length of x and y arrays
The type “complex_float” is defined as
typedef struct{
float32 dat[2];
}complex_float;
Element dat[0] is the real part, dat[1] is the imaginary part
Alignment Requirements:
None
Example:
#include "FPU.h"
#define N 10
float32 y[N];
complex_float x[N];
main()
{
abs_SP_CV(y, x, N); // complex absolute value
}
Benchmark Information:
Number of Cycles = 28*N+9 cycles (including the call and return)
Sep 10, 2012 50

Texas Instruments C28 Series Specifications

General

Architecture	32-bit
Core	TMS320C28x
Operating Voltage	3.3 V
Operating Temperature	-40°C to 125°C
ADC	12-bit
Communication Interfaces	CAN, SPI, I2C, SCI
Peripherals	Timers
Package	Various (e.g., LQFP, BGA)

Summary

Introduction to C28x FPU Library

C28x FPU Library Structure

Library Build Options

Details the compiler options used to build the FPU library.

FPU Library Header Files

Explains the purpose and content of the library's header files.

C Functions and IQMath Integration

Discusses the use of C functions and IQMath in the FPU library.

C28x FPU Library Function Descriptions

DSP Routines Overview

Covers Fast Fourier Transforms (FFT) and related functions for signal processing.

Vector and Matrix Operations

Provides functions for element-wise operations on complex and real vectors.

Core Math Functions

Includes fundamental math operations like square root.

Optimized Utility Functions

Offers optimized memory copy and set operations.

FPU Library Revision History

Important Notice and Disclaimers