利用串口实现AVR单片机ISP功能的一种方法

ATMEL公司研发的AVR单片机提供一个同步串行通信接口SPI（Serial Peripheral Interface）,用户能够通过计算机的并行接口或串行接口对其内部程序存储器编程。实际上,利用串口实现AVR单片机ISP（In Sys-tem Programmable）功能就是使用计算机的串口来驱动AVR单片机ISP串行编程所需的信号波形,从而实现计算机对AVR单片机的编程。首先介绍AVR单片机ISP功能的原理,然后讨论利用串口实现AVR单片机ISP功能的一种方法,给出编程电缆原理图、编程电缆监控程序通信协议和编程工具软件。

A method for realizing the ISP Function of AVR Single Microcontroller by Using Serial Port

The single microcontroller in AVR Series was issued by ATMEL recently provided a serial peripheral interface （SPI） , with which could program through computer parallel port or serial port to its internal program memory. In fact,to realize the function of in system programmable （ISP） in AVR single microcontroller by using computer serial port is to force signal wave needed by the single microcontroller, achieving the AVR single microcontroller pro- grammed by computer. The ISP principle of the AVR single microcontroller was introduced, and a method to realize it by using computer serial port was discussed, also the programming cable chart, communication protocol and programming software were given.