#include <iom128v.h>
#include <macros.h>
/*************************************************/
void port_init(void) 
{
 PORTA = 0xFF; 
 DDRA  = 0x00; 
 PORTB = 0xFF; 
 DDRB  = 0xFF; 
 PORTC = 0xFF; 
 DDRC  = 0x00; 
 PORTD = 0xFF; 
 DDRD  = 0x02;
}
/**************************************************/
void uart0_init(void) 
{
 UCSR0B = 0x00; 
 UCSR0A = 0x02;
 UCSR0C = 0x06;
 UBRR0L = 0x67; 
 UBRR0H = 0x00; 
 UCSR0B = 0x18;
}
/********************************************************/
void init_devices(void) 
{
 port_init();
 uart0_init();
 }
//**********************************************
void uart0_send(unsigned char i)
{
while(!(UCSR0A&(1<<UDRE0)));
UDR0=i;
}
/*******************************************/
void str_send(char *s) 
{
 while(*s)
 {
 uart0_send(*s); 
 s++;
 }
}
/*********************************************/
unsigned char uart0_receive(void) 
{
while(!(UCSR0A&(1<<RXC0)));
return UDR0;
}
/********************************************/
void main(void)
{
unsigned char temp; 
init_devices();
//str_send("上海紅棱電子有限公司  ");
//str_send("AVR單片機RS232通信測試程序  ");
//str_send("http://www.hlelectron.com  ");
 while(1) 
 {
 temp=uart0_receive();
// str_send("當前按鍵是：");
 uart0_send(temp); 
// str_send("  ");
 }	
}