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AN2961

更新时间： 2022-10-23 12:37:14

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		/
页数	文件大小	规格书
50页	706K
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AN2961 数据手册

Document Number: AN2961

Rev. 1, 05/2007

Freescale Semiconductor

Application Note

Software Drivers for MC33696

by: Petr Gargulak

John Logan

Graham Williamson

TSPG, Freescale Semiconductor, Inc.

Contents

Introduction

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Communication Concept . . . . . . . . . . . . . . . . . . . . . . . . . 2

Message Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Message Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Reducing Power Consumption . . . . . . . . . . . . . . . . . . . . 5

Hardware Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Driver Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Status Word. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Using the Driver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

This application note describes the software device

driver written for the MC33696 transceiver IC (Echo)

and how it can be integrated and used in an application

on the HCS08 family of MCUs. The device driver allows

customer applications to use all features of the Echo

platform while remaining easily configurable.

10 Function Headers and Description . . . . . . . . . . . . . . . . 18

11 Echo Driver Configuration . . . . . . . . . . . . . . . . . . . . . . . 29

12 Adding the Echo Driver to an Application . . . . . . . . . . . 39

13 Example Echo Application. . . . . . . . . . . . . . . . . . . . . . . 46

14 Communicating with Romeo2 and Tango3 Devices . . . 47

The driver may be configured to run on any HCS08

MCU. You can specify different timer channels and I/O

pins on the MCU, allowing flexibility in system design,

modulation techniques, data rates, and clock sources. All

other Echo features are fully configurable. Full source

code and example applications are available on

www.freescale.com.

The driver is designed to allow communication in

Echo-only networks and also with the Tango3

transmitter and Romeo2 receiver devices. Device drivers

for Tango and Romeo are available on

www.freescale.com and documented in application note

12 3 4 5 6 7...50

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