(2007)基于ColdFire的评估系统的设计与实现(2)

基于ColdFire的评估系统的设计与实现

ABSTRACT Design and Implementation of an Evaluation System based on ColdFire

ABSTRACT

The rapid development of embedded system and the continual renovation of

manufacturing process enlarges the fields of 32-bit microprocessor. There are many kinds of 32-bit processors, mainly including ARM, x86, PowerPC, 68K/ColdFire and MIPS. Derived from 68K, ColdFire is a kind of 32-bit microprocessor having the aggressive price/performance and the high integrity. The chip’s applications need powerful development tools. Thus, an evaluation system for ColdFire is designed and implemented, which consists of the hardware evaluation board and the related development tools. So that, a serial of problems such as too much dependency on import tools and lacking of

development documents can be well solved. Additionally, an evaluation system with all-purpose, simple operation, low-price meets the needs of both study and development for all users.

A BDM cable for ColdFire CPUs and an IDE named SdIDE for ColdFire running on windows platform is developed. Taking MCF5271 as an example, this paper has designed an evaluation board SDEVB5271, applied the new development tools to it，constructed the whole evaluation system of SDEVB5271 which can be used to evaluate and develop

applications. The paper describes the flow of the whole development in detail, which can provide reference for the development of other ColdFire chips and other embedded productions.

First, this paper shows the hardware design, the theory block diagram of each

hardware module and the test flow of them. Second, the paper analyses the work theory of the ColdFire BDM and gives the hardware design of BDM cable and the way to write the drivers. Third, it realizes the key technology of the software design such as how to write makefile and linkfile and the download and execution of the code. At last, it gives the basic knowledge of an embedded application and an experiment on I/O port. At the same time, the paper even gives a real example of porting μClinux to SDEVB5271.

Keywords: Evaluation System, ColdFire, MCF5271, Cross-Compiler, Linker, BDM,

μCLinux