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 <reg51.h>
#include <stdio.h>
#include <string.h>
#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<INBUF_LEN;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++);
};
}。