原创 Cepark电子园 AVR M16实验之十 串口

/**********************************************************************
* 文件名称: main.c
* 程序作者: kidcao1987
* 程序版本: V1.0
* 功能描述: 接上串口，在串口调试助手里显示
“Serial Communication Test!
曹佃生的串口测试程序!!QQ:289718970
http://bbs.cepark.com”
* 编译器：WinAVR-20090313
* 芯片：ATmega16,外部11.0592MHZ晶振
* 技术支持：http://bbs.cepark.com
**********************************************************************/

#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>

#define BAUD 9600

volatile unsigned char ucReceivedData; //接收到的数据
unsigned char const ucStr1[]={"Serial Communication Test!"};
unsigned char const ucStr2[]={"曹佃生的串口测试程序!!QQ:289718970"};
unsigned char const ucStr3[]={"http://bbs.cepark.com"};


void USARTInit(void); //初始化
void USARTTransmitData(unsigned char); //发送数据
void USARTTransmitString(unsigned char const *pStr); //发送字符串


int main(void)
{
PORTD = 0x03;
DDRD = 0x02; //PD0输入 PD1输出

PORTB = 0xff;
DDRB = 0xff; //LED指示灯

USARTInit();

USARTTransmitString(ucStr1);
USARTTransmitString(ucStr2);
USARTTransmitString(ucStr3);
sei();
while(1)
{
USARTTransmitString(ucStr1);
USARTTransmitString(ucStr2);
USARTTransmitString(ucStr3);
USARTTransmitData(0x0d);
USARTTransmitData(0x0a);
_delay_ms(2000);
}
}


void USARTInit(void) //初始化
{
UCSRA = 0X00;
UCSRC |= (1<<URSEL) | (1 << UCSZ1) | (1 << UCSZ0); //异步通信，8位数据，1位停止位，无校验
UBRRL = (11059200 / BAUD / 16 - 1) % 256; //波特率设置为9600
UBRRH = (11059200 / BAUD / 16 - 1) / 256;
UCSRB |= (1 << RXCIE) | (1 << RXEN) | (1 << TXEN); //接收中断使能，接收使能，发送使能
}



void USARTTransmitData(unsigned char ucTransmitData)
{
while(!(UCSRA & (1<<UDRE)));//等待发送缓冲器为空

UDR = ucTransmitData; //发送
}



void USARTTransmitString(const unsigned char* pStr)
{
while(*pStr != '\0')
{
USARTTransmitData(*pStr++);
}
USARTTransmitData(0x0d);
USARTTransmitData(0x0a);
}


ISR(USART_RXC_vect)
{
ucReceivedData = UDR; //读数据

PORTB = ucReceivedData; //点亮LED
USARTTransmitData(ucReceivedData); //发送数据
}

视频地址：http://v.youku.com/v_show/id_XMTYxNTExMDcy.html

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