无线数据传输系统

无线数据传输系统

作者：高涵，窦振中

单片机收发程序清单：

static char code codebuf[]=//要发送的字符

"This program is a demo of the serial communication quomodo \n";

#include

#include

#include

#define TRUE 1

#define FALSE 0

#define INBUF_LEN 30 //数据长度

unsigned char inbuf1[INBUF_LEN];

sbit P2_0=P2^0;

bit read_flag;

unsigned char checksum,count3;

unsigned char t;

void Receive_prepare();

void Send_prepare();

void delay();

/****************************************

TMOD{GATE1 C/~T M1 M0 GATE0 C/~T M1 M0}

TCON{TF1 TR1 TF0 TR0 IE1 IT1 IE0 IT0}

IE {EA - ET2 ES ET1 EX1 ET0 EX0}

****************************************/

void init_serialcomm(void)

{

SCON = 0x50; //SCON: serail mode 1, 8-bit UART, enable ucvr TMOD |= 0x20; //TMOD: timer 1, mode 2, 8-bit reload

PCON |= 0x80; //SMOD=1;

TH1 = 0xFA; //Baud:9600 fosc=11.0592MHz

IE |= 0x90; //Enable Serial Interrupt

TR1 = 1; // timer 1 run

// TI=1;

}

//向串口发送一个字符

void send_char_com(unsigned char ch)

{

SBUF=ch;

while(TI==0);

TI=0;

}

//向串口发送一个字符串，strlen为该字符串长度

void send_string_com(unsigned char *str,unsigned int strlen) {

unsigned int k=0;

do

{

send_char_com(*(str + k));

k++;

} while(k < strlen);

}

//串口接收中断函数

void serial () interrupt 4 using 3

{

if(RI)

{

unsigned char ch;

RI = 0;

ch=SBUF;

read_flag=TRUE;

}

}

main()

{

unsigned char i;

P2_0=TRUE; //置PTR2000为发送状态

read_flag=FALSE;

init_serialcomm(); //初始化串口

t=0; //清发送字符个数

while(t<40)

{for(i=0;i

{inbuf1[i]=codebuf[t];t++;

} send_string_com(inbuf1,INBUF_LEN); }

while(1)

{Receive_prepare();

while(!read_flag);

read_flag=FALSE;

Send_prepare();

send_string_com(inbuf1,INBUF_LEN);

}

}

void Receive_prepare()

{P2_0=FALSE;

delay();

}

void Send_prepare()

{P2_0=TRUE;

delay();

}

void delay()

{unsigned char i,j;

for(i=0;i<250;i++)

{for(j=0;j<10;j++);

};

}