C51串口中断接收和发送程序

//和查询发送，另外我觉得发送没有必要用中断
#include
#include
#define INBUF_LEN4 //数据长度
unsigned char inbuf1[INBUF_LEN];
unsigned char checksum,count3;
bitread_flag=0;
void init_serialcomm( void )
{
SCON=0x50; //SCON:serailmode1,8-bitUART,enableucvr
TMOD|=0x20; //TMOD:timer1,mode2,8-bitreload
PCON|=0x80; //SMOD=1;
TH1=0xF4; //Baud:4800fosc=11.0592MHz
IE|=0x90; //EnableSerialInterrupt
TR1=1; //timer1run
//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 }
//串口接收中断函数
void serial() interrupt4using3
{
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; //如果串口接收的数据达到INBUF_LEN个，且校验没错，
//就置位取数标志
}
}
}
}
main()
{
init_serialcomm(); //初始化串口
while (1)
{
if (read_flag) //如果取数标志已置位，就将读到的数从串口发出
{
read_flag=0; //取数标志清0
send_string_com(inbuf1,INBUF_LEN);
}}
}