51單片機(jī)串口檢測程序(C語言代碼)
void send_char_com( unsigned char ch)
{
SBUF=ch;
while (TI== 0 );
TI= 0 ;
}本文引用地址:http://butianyuan.cn/article/171154.htm
//向串口發(fā)送一個字符串,strlen為該字符串長度
void send_string_com( unsigned char *str, unsigned int strlen)
{
unsigned int k= 0 ;
do
{
send_char_com(*(str + k));
k++;
} while (k strlen);
}
//串口接收中斷函數(shù)
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,且校驗沒錯,
//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);
}
}
}
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