void serial () interrupt 4 using 3

{

if (RI)

{

unsigned char ch;

RI = 0 ;

ch=SBUF;

if (ch> 127 )

{

count3= 0 ;

inbuf1[count3]=ch;

checksum= ch- 128 ;

}

else

{

count3++;

inbuf1[count3]=ch;

checksum ^= ch;

if ( (count3==(INBUF_LEN- 1 )) (!checksum) )

{

read_flag= 1 ; //如果串口接收的數(shù)據(jù)達(dá)到INBUF_LEN個(gè)，且校驗(yàn)沒(méi)錯(cuò)，

//就置位取數(shù)標(biāo)志

}

}

}

}

main()

{

init_serialcomm(); //初始化串口

while ( 1 )

{

if (read_flag) //如果取數(shù)標(biāo)志已置位，就將讀到的數(shù)從串口發(fā)出

{

read_flag= 0 ; //取數(shù)標(biāo)志清0

send_string_com(inbuf1,INBUF_LEN);

}

}

}