AVR单片机的实验代码，经过测试可以用的。包括普通IO口实验、定时器实验、数码管显示实验、AD转换并显示实验和EEPROM 读写实验.不但有代码，还有简单解释和原理说明-AVR microcontroller experimental code, tested can be used. Including general IO port test, test timer, digital display experiment, AD conversion and display experime