这是一个针对AVR单片机的串口编程，里面有原理图，加上串口源码。针对型号为ATMEGA128的AVR单片机使用。其它的芯片，如果寄存器一样也可套用。-This is a serial port for AVR MCU programming, which has schematic diagram, together with the serial code. ATmega128 model for single-chip using the AVR. Other chips, the same