串口实验程序

写法很奇怪啊。你这样通运中历培漏过点按钮是触发不了接旁搜收的

private SerialPort sp = null

private void button1_Click(object sender, EventArgs e)

{

sp = new SerialPort()

sp.PortName = "COM1"

sp.BaudRate = 9600

sp.StopBits = StopBits.One

sp.DataBits = 8

sp.Parity = Parity.Even

sp.Open()

sp.DataReceived += sp_DataReceived

}

void sp_DataReceived(object sender, SerialDataReceivedEventArgs e)

{

SerialPort sp = sender as SerialPort

textBox2.Text += sp.ReadExisting()

}

#include <AT89X51.H>//单片机51头文知物件,存放着单片机的寄存器

unsigned char dat//用于存储单片机接收发送缓冲寄存器SBUF里面的内容

sbit gewei=P2^2//个位选通定义

sbit shiwei=P2^3//十位选通定义

unsigned char code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x67,0x77,0x7c,0x39,0x5e,0x79,0x71}

//{0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x67,}// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

void Delay(unsigned int tc) //延时程序

{

while( tc != 0 )

{unsigned int i

for(i=0i<100i++)

tc--}

}

void LED() //LED显示接收到的数据

{

shiwei=0

P0=~table[dat/16]

Delay(8)

shiwei=1

gewei=0

P0=~table[dat%16]

Delay(5)

gewei=1

}

void Init_Com(void)//功能:串口初始化,波特率9600，方式1

{

TMOD = 0x20

PCON = 0x00

SCON = 0x50

TH1 = 0xFd

TL1 = 0xFd

TR1 = 1

}

void main()//主扰空程序功能:实现接收数据并把接收到的数据原样发送回去///////

{

Init_Com()//串口初始化

// P1=0xf0

while(1)

{

if ( RI ) //扫描判断缓猛瞎是否接收到数据，

{

dat = SBUF //接收数据SBUF赋与dat

RI=0 //RI清零。

SBUF = dat //在原样把数据发送回去

}

LED()//显示接收到的数据

}

}

编戚野写串口通讯程序步滑滑骤为：

1、设置波特率

2、设置串口工作方式

3、收发数据。

比如：

main()

{

unsigned char dat

TMOD=0x20

TH1=0xfd

TL1=0xfd

TR1=1

SCON=0x50

while(1)

    {

    while(RI==0)

    RI=0

    dat=SBUF

    SBUF=~dat

    while(TI==0)

    TI=0

  信仔腊  }

}

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