AVR开发板测试程序, 包括常用芯片DS1302,DS18B20,24C02,LCD1602,键盘,LED,蜂鸣器等常用外设的驱动程序和测试程序-AVR development board test procedures, including the commonly used chip, DS1302, DS18B20, 24C02, LCD1602, keyboard, LED, buzzer and other commonly used peripheral drivers and te