Microchip Technology dsPIC33F Family Manual de usuario descargar pdf (Pagina 53)

dsPIC33F

Key features of the Digital Filter Design tool include:

Finite Impulse Response Filter Design

• Design Method Selection

- FIR Windows Design

- FIR Equiripple Design (Parks-McClellan)

• Low-Pass, High-Pass, Band-Pass and Band-Stop

Filters

• FIR Filters can have up to 513 taps

• The following window functions are supported:

- Rectangular

- Hanning (Hann)

- Hamming

- Triangular

-Blackman

- Exact Blackman

-3 Term Cosine

- 3 Term Cosine with Continuous 3rd Derivative

- Minimum 3 Term Cosine

-4 Term Cosine

- 4 Term Cosine with continuous 5th Derivative

- Minimum 4 Term Cosine

- Good 4 Term Blackman Harris

-Harris Flat Top

-Kaiser

- Dolph-Tschebyscheff

-Taylor

-Gaussian

• Reports show design details, such as window

coefficients and impulse response prior to

multiplying by the window function

Infinite Impulse Response Filter Design

• Low-Pass, High-Pass, Band-Pass and Band-Stop

Filters

• Filter Orders up to 10 for Low-Pass and

High-Pass Filters

• Filter Orders up to 20 for Band-Pass and

Band-Stop Filters

• Five Analog Prototype Filters are available:

- Butterworth

- Tschebyscheff

- Inverse Tschebyscheff

- Elliptic

-Bessel

• Digital Transformations are performed by Bilinear

Transformation Method

• Reports show design details, such as all

transformations from normalized low-pass filter to

desired filter

Code Generation Features

• Generated files are compliant with the Microchip

dsPIC33F C30 C Compiler, Assembler and Linker

• Choice of placement of coefficients in Program

Space or Data Space

• ‘C’ Wrapper/Header Code Generation

Graphs

• Magnitude Response vs. Frequency

• Log Magnitude vs. Frequency

• Phase Response vs. Frequency

• Group Delay vs. Frequency

• Impulse Response vs. Time (per sample)

• Step Response vs. Time (per sample)

• Pole and Zero Locations (IIR only)

11.6 Microchip TCP/IP Stack

The free Microchip TCP/IP Stack is a suite of programs

that can provide services to standard (HTTP Server,

Mail Client, etc.) or custom TCP/IP-based applications.

Users do not need to be an expert in TCP/IP

specifications to use it and only need specific

knowledge of TCP/IP in the accompanying HTTP

Server application.

This stack is implemented in a modular fashion, with all

of its services creating highly abstracted layers, each

layer accessing services from one or more layers

directly below it. The stack is optimized for size and is

designed to run on the dsPIC33F using the

dsPICDEM.net™ Development Board; however, it can

be easily retargeted to any hardware equipped with a

dsPIC33F. HTML web pages generated by the

dsPIC33F can be viewed with a standard web browser

such as Microsoft Internet Explorer.

Key features of the Microchip TCP/IP Stack include:

• Out-of-box support for Microchip C30 C Compiler

• Implements complete TCP state machine

• Multiple TCP and UDP sockets with simultaneous

connection/management

• Includes modules supporting various standard

protocols: MAC, SLIP, ARP, IP, ICMP, TCP,

SNMP, UDP, DHCP, FTP, IP Gleaning, HTTP,

MPFS (Microchip File System)

• Can be used as a part of the HTTP Server

(included) or any custom TCP/IP-based

application

• RTOS independent

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Microchip Technology dsPIC33F Family Manual de usuario Pagina 53

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