下载到avr单片机上以后，单片机与电脑通过串口线连接，打开单片机，会在电脑串口工具上自动提示，可以读取某个外部地址上的数据-Downloaded to the avr microcontroller, the processor with the computer via serial cable, open the microcontroller, the computer will automatically prompt on the serial tool, you can read t