C51串口中斷接收和發送程序
//這是一個單片機C51串口接收(中斷)和發送例程,可以用來測試51單片機的中斷接收
//和查詢發送,另外我覺得發送沒有必要用中斷
#include <reg51.h>
#include <string.h>
#define INBUF_LEN 4 //數據長度
unsigned char inbuf1[INBUF_LEN];
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=1;
}
//向串口發送一個字符
void send_char_com(unsigned char ch)
{
SBUF=ch;
while(TI==0);
TI=0;
}
//向串口發送一個字符串,strlen爲該字符串長度
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
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; //如果串口接收的數據達到INBUF_LEN個,且校驗沒錯,
//就置位取數標誌
}
}
}
}
main()
{
init_serialcomm(); //初始化串口
while(1)
{
if(read_flag) //如果取數標誌已置位,就將讀到的數從串口發出
{
read_flag=0; //取數標誌清0
send_string_com(inbuf1,INBUF_LEN);
} }
}
//和查詢發送,另外我覺得發送沒有必要用中斷
#include <reg51.h>
#include <string.h>
#define INBUF_LEN 4 //數據長度
unsigned char inbuf1[INBUF_LEN];
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=1;
}
//向串口發送一個字符
void send_char_com(unsigned char ch)
{
SBUF=ch;
while(TI==0);
TI=0;
}
//向串口發送一個字符串,strlen爲該字符串長度
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
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; //如果串口接收的數據達到INBUF_LEN個,且校驗沒錯,
//就置位取數標誌
}
}
}
}
main()
{
init_serialcomm(); //初始化串口
while(1)
{
if(read_flag) //如果取數標誌已置位,就將讀到的數從串口發出
{
read_flag=0; //取數標誌清0
send_string_com(inbuf1,INBUF_LEN);
} }
}
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