单片机

只看该作者 · 2013-4-11 19:45

求一段51单片机串口发送接收的C程序！

只看该作者 · 2013-4-11 20:39

#include <REG52.h>
#include <string.h>
#include <stdio.h>
#define uchar unsigned char
#define uint unsigned int
#define ulong unsigned long
#define ushort  unsigned short
#define MAX_DATA_LENGTH    32
typedef struct//定义数据发送包
{
uchar head;//包头
uchar length;//数据长度
uchar cmd;//命令
uchar sData[6];//数据
uchar crc;//校验
uchar end;//包尾
} Packet,*PT;
typedef struct//定义接收缓冲区
{
uchar iCnt;
uchar sData[MAX_DATA_LENGTH];
} RecvBuf,*RB;
void SendD(PT addrBuf,uint cnt);//定义发送函数
void Sleep(uint ms);//定义延时子程序
void init();//C51初始化程序
bit Judge(RB addrBuf);
void Crc(PT addrBuf);
Packet  pT;
RecvBuf rB;
void main()
{
memset(&pT,0x00,MAX_DATA_LENGTH+5);
memset(&rB,0x00,MAX_DATA_LENGTH+1);
pT.head=0x02;
pT.length=0x0b;
pT.cmd=0x44;
pT.end=0x03;
sprintf(pT.sData,"%s","080327");
pT.crc=0x056;
init();
while(1)
{
   Sleep(10000);
}
}
void serial(void) interrupt 4//定义串行口中断处理子程序
{
ES=0;
while(RI)
{
      rB.sData[rB.iCnt]=SBUF;
      rB.iCnt++;
      RI=0;
}
if(Judge(&rB))
{
      memset(&rB,0x00,MAX_DATA_LENGTH+1);
      SendD((uchar*)&pT,pT.length);
}
ES=1;
}
bit Judge(RB addrBuf)
{
if(addrBuf->sData[0]==0x02&&addrBuf->sData[addrBuf->sData[1]-1]==0x03)
      return 1;
else
      return 0;
}
void init()//完成51初始化工作
{
TMOD=0x20;//初始化51
TH1=0xfd;
TL1=0x0Fd;
TR1=1;
SCON=0x50;
PCON=0x00;
EA=1;
ES=1;
}
void SendD(uchar *addrBuf,uchar cnt)
{
int i=0;
T0=0;
while(++i<=cnt)
{
      SBUF=addrBuf[i-1];
      while(!TI);
      TI=0;
}
}
void Sleep(uint ms)//定义延时子程序
{
int i,j;
for(i=0;i<ms;i++)
      for(j=0;j<10;j++);
}

1万 · 2013-4-11 21:15

本帖最后由 airwill 于 2013-4-11 21:20 编辑

网上，随便搜索，到处都是。
看看 KEIL 里的例子：(\KEIL\C51\Examples\CSAMPLE)
/*------------------------------------------------------------------------------
CSAMPLE1.C

Copyright 1995-2005 Keil Software, Inc.
------------------------------------------------------------------------------*/

#include <reg51.h>                            /* define 8051 registers */
#include <stdio.h>                            /* define I/O functions */

extern unsigned int getnumber (void);
extern void output (unsigned int);

void main (void)  {                         /* main program */
  unsigned int number1, number2;             /* define operation registers */
  bit operation;                            /* define operation */

  SCON = 0x52; /* SCON */                /* setup serial port control */
  TMOD = 0x20; /* TMOD */                /* hardware (2400 BAUD @12MHZ) */
  TCON = 0x69; /* TCON */
  TH1 =  0xf3; /* TH1 */

  printf ("\n\nC compiler demonstration program\n\n");

  while (1)  {                               /* repeat forever */
number1 = getnumber ();                   /* read number1 */
number2 = getnumber ();                   /* read number2 */
printf ("Input operation: '+' (ADD) or '-' (SUB) ? ");
operation = (getchar () == '+');          /* get operation */
output (operation ? (number1 + number2) /* perform operation */
                  : (number1 - number2) );
  }
}

/*------------------------------------------------------------------------------
CSAMPLE2.C

Copyright 1995-2005 Keil Software, Inc.
------------------------------------------------------------------------------*/

#include <stdio.h>                            /* define I/O functions */

void getline (char *line)  {
  while ((*line++ = getchar()) != '\n');
}

int atoi (char *line)  {
  bit sign;
  int number;

  /* skip white space */
  for ( ; *line == ' ' || *line == '\n' || *line == '\t'; line++);

  /* establish sign */
  sign = 1;
  if (*line == '+' || *line == '-')  sign = (*line++ == '+');

  /* compute decimal value */
  for (number=0; *line >= '0' && *line <= '9'; line++)
number = (number * 10) + (*line - '0');

  return (sign ? number : -number);
}

unsigned int getnumber (void)  {
  char line [40];

  printf ("Input Number ? ");
  getline (line);
  return (atoi (line));
}

/*------------------------------------------------------------------------------
CSAMPLE3.C

Copyright 1995-2005 Keil Software, Inc.
------------------------------------------------------------------------------*/

#include <stdio.h>                            /* define I/O functions */

char dummy_buffer [25];                      /* only for demostration */

void output (unsigned int number)  {
  printf ("\nresult: %d\n\n", number);
}

只看该作者 · 2013-4-11 22:47

百度

单片机

相关下载

相关帖子

技术新星奖章

以坛为家

晶莹之水滴

技术导师奖章

沉静之湖泊

无冕之王奖章

缘定三生

荣誉元老奖章

坚毅之洋流

十世金身

技术领袖奖章

技术奇才奖章

湍急之河流

七世轮回

精华达人奖章