comm.h

12864

#include <string.h>


#define INBUF_LEN 8
unsigned char inbuf1[]="aphero";
unsigned char checksum,count3;
bit read_flag=0;

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 = 0xF4; //Baud:4800 fosc=11.0592MHz 
IE |= 0x90; //Enable Serial Interrupt 
TR1 = 1; // timer 1 run 
TI=0; 
}

//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;
while(k < strlen)
{
send_char_com(*str++);
k++;
} 
}


//串口接收中断函数 

void serial () interrupt 4 using 3 
{
if(RI)
{
unsigned char ch;

ch=SBUF;
send_char_com(ch);
count3++;
inbuf1[count3]=ch;
checksum ^= ch;
RI = 0;
if( (count3==(INBUF_LEN-1)) && (!checksum) )
{
read_flag=1; //如果串口接收的数据达到INBUF_LEN个，且校验没错,就置位取数标志 
}
}

}