uart.c

spi的i/o茉莉程序

#include <iom8v.h>
#include "uart.h"

void Uart_init(void)
{
UCSRB=((1<<RXEN)|(1<<TXEN));//
UBRRL=25;
UBRRH=0;//
UCSRC=(1<<URSEL)|(1<<UCSZ1)|(1<<UCSZ0);
}

void Send_abyte(unsigned char abyte)
{
while(!(UCSRA&(1<<UDRE)));
UDR=abyte;
}

unsigned char Receive_abyte(void)
{
while(!(UCSRA&(1<<RXC)));
return UDR;
}


void Prints(unsigned char *string,unsigned char enter)
{
 unsigned char i;
 i=0;
 while(string[i]!=0)    //判断字符串是否结束
  {
   while(!(UCSRA&(1<<UDRE)));  //等待发送完毕
   UDR=string[i];
   i++;            //移到下字节
  }
 if(enter)       //如果需要换行
  {
   Send_abyte(10);
   Send_abyte(13);   //发送回车换行
  }
}