已建成的Arduino硬件引脚0和1（也通过USB连接到电脑）的串行通信的支持.-The Arduino hardware has built-in support for serial communication on pins 0 and 1 (which also goes to the computer via the USB connection). The native serial support happens via a piece of hardware (built int

usb design with avr atmega 32 0r 2-usb design with avr atmega 32 0r 2333