UTRA_test.rar_mega8 串口

#include <avr/io.h> #include <avr/interrupt.h> #define cpu_f 8000000 #define BAUD 9600 int main(void) { UBRRH = (cpu_f/BAUD/16-1)/256; UBRRL = (cpu_f/BAUD/16-1)%256; UCSRB |= (1<<RXEN)|(1<<TXEN)|(1<<RXCIE); sei(); while ( !( UCSRA & (1<<UDRE)) );/* 等待发送缓冲器为空 */ UDR = 0x61;/* 将数据放入缓冲器，发送数据 */ while(1); }