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AN2821

更新时间： 2022-01-21 20:09:00

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eTPU Host Interface

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AN2821 数据手册

AN2821

Rev. 1, 08/2004

Freescale Semiconductor

Application Note

eTPU Host Interface

by: Ming Li

Detroit Virtual Garage

Table of Contents

This application note shows how to build the host

interface to access eTPU functions. The eTPU PWM

driver is used as an example to illustrate what the host

needs to do to configure eTPU module, channel and

initialize PWM function. The application note also

describes the details of how to export eTPU software

information to the host compiler. The working code

example is presented in the Appendix. The user can

compile both host and eTPU code, then download to

actual hardware for testing.

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

Overview .............................................................2

eTPU and Host Interface Hardware ....................3

Host Interface Software ......................................4

4.1 Initialization Overview........................................4

4.2 eTPU Module Initialization.................................5

4.3 eTPU Channel Initialization ...............................6

4.4 eTPU Function Initialization...............................6

4.5 eTPU and Host Interactive Control....................7

Software Integration ............................................8

Conclusion...........................................................8

Appendix 1 ..........................................................9

1 Introduction

The eTPU is the new generation of Time Processing Unit

(TPU) by Freescale. Besides the hardware enhancement,

significant improvements have been made to the

accompanying software development tools; these tools

make the enhanced Time Processing Unit (eTPU) easy to

use. A high level language (C) compiler has been

developed to allow the user to program the eTPU by

using C language instead of microcode.

To program the eTPU effectively, the programmer still

needs to have a clear understanding of how the eTPU

This document contains information on a new product. Specifications and information herein

are subject to change without notice.

12 3 4 5 6 7...24

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