AVR串口发送程序

/*
CPU:    ATMega32
频率：  8.0MHz
编译器：CodeVisionAVR   1.24.8c

串口发送程序
*/


＃i nclude <mega32.h>
＃i nclude <delay.h>
＃i nclude <stdio.h>

#define uchar unsigned char // 0~255
#define uint unsigned int     // 0~65535    
#define _SPK            PORTB.2
#define _LED            PORTB.3
#define CLI()           #asm("cli")
#define SEI()           #asm("sei")

/**//* UCSRA */
#define RXC     7
#define TXC     6
#define UDRE    5
#define FE      4
#define DOR     3
#define PE      2
#define U2X     1
#define MPCM    0

/**//* UCSRB */
#define RXCIE   7
#define TXCIE   6
#define UDRIE   5
#define RXEN    4
#define TXEN    3
#define UCSZ2   2
#define RXB8    1
#define TXB8    0

/**//* UCSRC */
#define URSEL   7
#define UMSEL   6
#define UPM1    5
#define UPM0    4
#define USBS    3
#define UCSZ1   2
#define UCSZ0   1
#define UCPOL   0

//=============================================================================
// 初始化，闪亮LED
//=============================================================================
void initport(void)
{
    uchar i;
    DDRB = 0xFF;
    PORTB = 0xFF;
    
    for(i=0; i<20; i++)
    {
        _LED = ~_LED;
        delay_ms(100);
    }
    
    _SPK = 0;
    delay_ms(500);
    _SPK = 1;
}
                 
           
#define BAUDRATE    9600
#define F_CPU       8000000
void init_USART(void)//USART 初始化
{
    //USART 9600 8, n,1  PC上位机软件(超级终端等)也要设成同样的设置才能通讯
    UCSRC = (1<<URSEL) | 0x06;    //异步，8位数据，无奇偶校验，一个停止位，无倍速    
    UBRRL= (F_CPU/BAUDRATE/16-1)%256;
    UBRRH= (F_CPU/BAUDRATE/16-1)/256;
    UCSRA = 0x00;
    // UCSRB = (1<<RXCIE)|(1<<RXEN)|(1<<TXEN); //使能接收中断，使能接收，使能发送
    UCSRB = (1<<TXEN);    // 使能发送
}   

void put_c(unsigned char c) //发送采用查询方式
{
    while( !(UCSRA & (1<<UDRE)) );
    UDR="c";
}

void put_s(unsigned char *ptr)
{
    while (*ptr)
    ...{
        put_c(*ptr++);
    }
    put_c(0x0D);
    put_c(0x0A);  //结尾发送回车换行
}

char ss[10] = "12345";
void main()
{
    DDRB = 0xFF;
    PORTB = 0xFF;
    init_USART();
    initport();
   
    while(1)
    {
        _LED = ~_LED;
        delay_ms(500);
        put_s(ss);
    }
}