6AVR实验平台外围接口设计

AVR实验平台外围接口设计

摘要：AVR是世界上著名的高性能、低功耗、非易失性存储器和数字集成电路的一流半导体。STK500是ATMEL最推荐的编程方式，下载速度快，并支持在线调试。JTAG ICE是基于JTAG接口的片上调试工具，硬仿真目标系统。本文将应用STK500和JTAG ICE的相关知识，接口技术等为AVR实验平台设计外围接口，使实验平台完整。本设计能够使用USB接口或者串口两种接口进行通信，包括STK500协议的串口下载与JTAG ICE仿真。本文先完成课题的设计思路，在此基础上根据相关的知识完成硬件原理图的设计，另外还需要通过软件实现开发调试。

关键词：微控制器；接口；STK500；JTAG

Design for the periphery interface of AVR experiment

platform

Abstract：AVR is the most famous semiconductor in the world because of high performance, low-power consumption, not easy to lose nature memorizer and figure IC.STK500 is the most recommended programming means by ATMEL, which have high download speed and supports online debugging. JTAG ICE is a on-chip debugging tools which based on JTAG interface, it's a hardware simulation system. In order to make experimental platform integrity, we use some knowledge and interface technology to design AVR experimental platform's peripheral interface. These knowledge and technology will including STK500,JTAG ICE and so on. This design will implement the communication through USB or serial interface, including serial download based on STK500 agreement and JTAG ICE simulation. First, this paper complete the functional requirement analysis. Then we design the diagram of hardware principle according to relevant knowledge. Finally a software be used to debug this system.

Keywords: MCU, Interface, STK500, JTAG

目 录

第1章 绪 论 .................................................................................................................................... 1

1.1 选题背景与意义 ....................................................................................................... 1

1.2 国内外研究现状与发展 ........................................................................................... 2

1.3 论文的内容安排 ....................................................................................................... 3

第2章 设计思路 .............................................................................................................................. 4

2.1 STK500的选用与功能简介 .................................................................................... 4

2.2 JTAG ICE的概况 ..................................................................................................... 5

2.3 总体逻辑设计 ........................................................................................................... 6

2.4 本章小结 ................................................................................................................... 7

第3章 硬件设计 .......................................................................................................... 9

3.1 STK500下载器的设计 ............................................................................................ 9

3.1.1 主控制芯片选用及简介 .................................................................................... 9

3.1.2 硬件连接方式 .................................................................................................. 10

3.1.3 STK500升级 .................................................................................................. 12

3.2 JTAG仿真接口设计 .............................................................................................. 13

3.2.1 主控制芯片选用及简介 .................................................................................. 13

3.2.2 硬件连接方式 .................................................................................................. 13

3.3 接口通信设计 ......................................................................................................... 16

3.3.1 USB接口简介及通信设计 ............................................................................. 16

3.3.2 RS-232C串口通信设计 .................................................................................. 18

3.4 供电模式设计 ......................................................................................................... 20

3.5 本章小结 ................................................................................................................. 23

第4章 使用AVR Studio的开发过程与仿真验证 .................................................. 24

4.1 开发器的选用 ......................................................................................................... 24

4.2 STK500固件的升级过程 ...................................................................................... 26

4.2.1 自动升级过程 .................................................................................................. 26

4.2.2 人工升级与修复 .............................................................................................. 27

4.3 JTAG ICE固件的升级过程 ................................................................................... 28

4.3.1 自动升级过程 .................................................................................................. 28

4.3.2 人工升级与修复 .............................................................................................. 29

4.4 使用STK500下载编程 ......................................................................................... 29

4.4.1 编程设置 .......................................................................................................... 30

4.4.2 熔丝设置 .......................................................................................................... 31

4.4.3 锁定位设置 ................................................ …… 此处隐藏：13144字，全部文档内容请下载后查看。喜欢就下载吧 ……