Microchip Technology dsPIC33F Family Uživatelský manuál stáhnout pdf (Strana 51)

dsPIC33F

TABLE 11-4: FUNCTION EXECUTION TIMES

11.4 dsPICworks™ Data Analysis and

DSP Software

The dsPICworks tool is a free data analysis and signal

processing package for use with Microsoft

Windows

9x, Windows NT

, Windows 2000 and

Windows XP platforms. It provides an extensive

number of functions encompassing:

• Wide variety of Signal Generators – Sine, Square,

Triangular, Window Functions, Noise

• Extensive DSP Functions – FFT, DCT, Filtering,

Convolution, Interpolation

• Extensive Arithmetic Functions – Algebraic

Expressions, Data Scaling, Clipping, etc.

• 1-D, 2-D and 3-D Displays

• Multiple Data Quantization and Saturation

Options

• Multi-Channel Data Support

• Automatic “Script File”-based Execution Options

available for any user-defined sequence of

dsPICworks Tool Functions

• File Import/Export interoperable with MPLAB IDE

• Digital Filtering Options support Filters generated

by dsPIC DSC Filter Design

• ASM30 Assembler File Option to export Data

Tables into dsPIC33F RAM

FIGURE 11-1:

dsPICworks

™

DATA

ANALYSIS AND DSP

SOFTWARE

Function

Cycle Count

Equation

Conditions

(1)

Number of

Cycles

(2)

Execution Time @

40 MIPS

Complex FFT

(3)

— N = 64 3739 93.5 μs

Complex FFT

(3)

— N = 128 8485 212.1 μs

Complex FFT

(3)

— N = 256 19055 476.4 μs

Block FIR 53 + N(4 + M) N = 32, M = 32 1205 30.1 μs

Block FIR Lattice 41 + N(4 + 7M) N = 32, M = 32 7337 183.4 μs

Block IIR Canonic 36 + N(8 + 7S) N = 32, S = 4 1188 29.7 μs

Block IIR Lattice 46 + N(16 + 7M) N = 32, M = 8 2350 58.8 μs

Matrix Add 20 + 3(C * R) C = 8, R = 8 212 5.3 μs

Matrix Transpose 16 + C(6 + 3(R – 1)) C = 8, R = 8 232 5.8 μs

Vector Dot Product 17 + 3N N = 32 113 2.8 μs

Vector Max 19 + 7(N – 2) N = 32 229 5.7 μs

Vector Multiply 17 + 4N N = 32 145 3.6 μs

Vector Power 16 + 2N N = 32 80 2.0 μs

Note 1: C = # columns, N = # samples, M = # taps, S = # sections, R = # rows.

2: 1 cycle = 25 nanoseconds @ 40 MIPS.

3: Complex FFT routine inherently prevents overflow.

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 89 90

Komentáře k této Příručce

Žádné komentáře

Microchip Technology dsPIC33F Family Uživatelský manuál Strana 51

Komentáře k této Příručce