c串口编程实例
A. 如何用c语言写一个读、写串口的程序
大致过程就是
配置串口通信，包括串口号、波特率、校验位、停止位这些信息；
打开串口，和打开文件一样，在Linux下是这样，Windows下没试过，估计也差不多；
发送数据，即写串口，就跟写文件类似；
读取串口，用read就行。
具体的函数和配置参数可以参考一些别人的代码。
B. 求c++串口通信实例源代码
推荐看书
Visual C++_Turbo C串口通信编程实践
需要 pdf 文档 可以联系
希望能解决您的问题。
C. 怎么使用C编写一个串口文件传输程序
#include
#include
int main(void)
{
FILE *fp;
char temp;
char buf[100];
if((fp = fopen("com3","r")) == NULL)
puts("this way doesn't work!\n");
else
puts("this way works!\n");
while(1)
{
temp = 0;
fscanf(fp,"%c",&temp);
if(temp != 0)
putchar(temp);
else
Sleep(100);
}
fclose(fp);
return 0;
}
：CONCATENATE(Text，Text……) 参数说明：T
D. 51单片机串口通信c语言编程
#include <REG52.H>
#define uchar unsigned char
#define uint unsigned int
sbit ring=P3^7;
sbit CASE1=P2^0;
sbit CASE2=P2^1;
sbit CASE3=P2^2;
sbit CASE4=P2^3;
uchar se=0,re=0;
uchar temp=0;
void wait(uint cnt)
{
while(--cnt);
}
//串口发送程序
void send(uchar se)
{
SBUF=se; //发送数据
while(TI == 0);
TI = 0;
}
//串口接收程序
uchar receive(void)
{
re=SBUF; //接收数据
while(RI==0);
RI=0;
return re;
}
//串口初始化
void sinti(void)
{
SCON = 0x50;
TMOD |= 0x20;
TH1 = 0xFD;
TR1 = 1;
EA = 1;
ES = 1;
}
void delay(int cnt)
{
while(--cnt);
}
//主程序
int main (void)
{
int i;
sinti(); //串口初始化程序
ring=1;
while(1)
{
while (1)
{
if(CASE1==0)
{
send('a');
ring=0;
break;
}
if(CASE2==0)
{
send('b');
ring=0;
break;
}
if(CASE3==0)
{
send('c');
ring=0;
break;
}
if(CASE4==0)
{
send('d');
ring=0;
break;
}
}
if(ring==0)
{
wait(60000);
ring=1;
}
for(i=0;i<10000;i++);
}
}
//串口中断程序
void UART_SER (void) interrupt 4 //串行中断服务程序
{
if(RI) //判断是接收中断产生
{
RI=0; //标志位清零
temp=SBUF;
}
if(TI) //如果是发送标志位，清零
TI=0;
}
E. c语言怎么实现串口通信
编程原理 程序1为查询通信方式接口程序，为一典型的数据采集例程。其中bioscom()函数初始化COM1(此函数实际调用BIOS INT 14H中断0号功能)。这样在程序中就避免了具体设置波特率因子等繁琐工作，只需直接访问发送/接收寄存器(3F8H)和线路状态寄存
F. 谁能给我一个上位机控制下位机的串口通信程序（C语言编写吧）
#include "stdafx.h"
#include "CommWizard.h"
#include "CommWizardDlg.h"
#include "SettingDlg.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About
class CAboutDlg : public CDialog
{
public:
CAboutDlg();
// Dialog Data
//{{AFX_DATA(CAboutDlg)
enum { IDD = IDD_ABOUTBOX };
//}}AFX_DATA
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CAboutDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
//}}AFX_VIRTUAL
// Implementation
protected:
//{{AFX_MSG(CAboutDlg)
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
//{{AFX_DATA_INIT(CAboutDlg)
//}}AFX_DATA_INIT
}
void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CAboutDlg)
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
//{{AFX_MSG_MAP(CAboutDlg)
// No message handlers
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CCommWizardDlg dialog
CCommWizardDlg::CCommWizardDlg(CWnd* pParent /*=NULL*/)
: CDialog(CCommWizardDlg::IDD, pParent)
{
bSend = FALSE;
bReceive = FALSE;
m_nPort = 1;
m_strSettings = _T("9600,n,8,1");
m_strSendString = _T("");
m_nTime = 1000;
m_nInputMode = 1;
//{{AFX_DATA_INIT(CCommWizardDlg)
m_strReceive = _T("");
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CCommWizardDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CCommWizardDlg)
DDX_Control(pDX, IDC_RECEIVE, m_ctrlReceive);
DDX_Control(pDX, IDC_SEND, m_ctrlSend);
DDX_Control(pDX, IDC_TYPE, m_ctrlDataType);
DDX_Text(pDX, IDC_EDIT_RECEIVE, m_strReceive);
DDX_Control(pDX, IDC_COMMCTRL, m_Com);
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CCommWizardDlg, CDialog)
//{{AFX_MSG_MAP(CCommWizardDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_RECEIVE, OnReceive)
ON_BN_CLICKED(IDC_SEND, OnSend)
ON_BN_CLICKED(IDC_SETTINGS, OnSettings)
ON_CBN_SELCHANGE(IDC_TYPE, OnSelchangeType)
ON_BN_CLICKED(IDC_CLEAR, OnClear)
ON_BN_CLICKED(IDC_MANUALSEND, OnManualsend)
ON_WM_TIMER()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CCommWizardDlg message handlers
BOOL CCommWizardDlg::OnInitDialog()
{
CDialog::OnInitDialog();
// Add "About..." menu item to system menu.
// IDM_ABOUTBOX must be in the system command range.
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000);
CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
CString strAboutMenu;
strAboutMenu.LoadString(IDS_ABOUTBOX);
if (!strAboutMenu.IsEmpty())
{
pSysMenu->AppendMenu(MF_SEPARATOR);
pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
}
}
// Set the icon for this dialog. The framework does this automatically
// when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon
// TODO: Add extra initialization here
m_ctrlDataType.AddString(_T("按ASCII码"));
m_ctrlDataType.AddString(_T("按2进制"));
m_ctrlDataType.AddString(_T("按16进制"));
m_ctrlDataType.SetCurSel(m_nInputMode);
return TRUE; // return TRUE unless you set the focus to a control
}
void CCommWizardDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialog::OnSysCommand(nID, lParam);
}
}
// If you add a minimize button to your dialog, you will need the code below
// to draw the icon. For MFC applications using the document/view model,
// this is automatically done for you by the framework.
void CCommWizardDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting
SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);
// Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;
// Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialog::OnPaint();
}
}
// The system calls this to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR CCommWizardDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}
void CCommWizardDlg::OnReceive()
{
// TODO: Add your control notification handler code here
m_Com.GetInput();//先预读缓冲区以清除残留数据
bReceive = !bReceive;
if(bReceive)
m_ctrlReceive.SetWindowText(_T("停止接收"));
else
m_ctrlReceive.SetWindowText(_T("开始接收"));
}
void CCommWizardDlg::OnSend()
{
// TODO: Add your control notification handler code here
bSend = !bSend;
if(bSend)
{
m_ctrlSend.SetWindowText(_T("停止发送"));
SetTimer(1,m_nTime,NULL);//时间为1000毫秒
}
else
{
m_ctrlSend.SetWindowText(_T("自动发送"));
KillTimer(1); //取消定时
}
}
void CCommWizardDlg::OnSettings()
{
// TODO: Add your control notification handler code here
CSettingDlg setDlg;
setDlg.nPort = m_nPort;
setDlg.nTime = m_nTime;
setDlg.strSettings = m_strSettings;
setDlg.strSendString = m_strSendString;
if(setDlg.DoModal() == IDOK)
{
m_nPort = setDlg.nPort;
m_nTime = setDlg.nTime;
m_strSettings = setDlg.strSettings;
m_strSendString = setDlg.strSendString;
}
OpenPort();
}
void CCommWizardDlg::OnSelchangeType()
{
// TODO: Add your control notification handler code here
m_nInputMode = m_ctrlDataType.GetCurSel();
}
void CCommWizardDlg::OnClear()
{
// TODO: Add your control notification handler code here
m_strReceive = _T("");
}
BEGIN_EVENTSINK_MAP(CCommWizardDlg, CDialog)
//{{AFX_EVENTSINK_MAP(CCommWizardDlg)
ON_EVENT(CCommWizardDlg, IDC_COMMCTRL, 1 /* OnComm */, OnOnCommCommctrl, VTS_NONE)
//}}AFX_EVENTSINK_MAP
END_EVENTSINK_MAP()
void CCommWizardDlg::OnOnCommCommctrl()
{
// TODO: Add your control notification handler code here
VARIANT variant_inp;
COleSafeArray safearray_inp;
LONG len,k;
BYTE rxdata[2048]; //设置BYTE数组 An 8-bit integerthat is not signed.
CString strtemp;
if(bReceive)
{
if(m_Com.GetCommEvent()==2) //事件值为2表示接收缓冲区内有字符
{
variant_inp = m_Com.GetInput(); //读缓冲区
safearray_inp = variant_inp; //VARIANT型变量转换为ColeSafeArray型变量
len=safearray_inp.GetOneDimSize(); //得到有效数据长度
for(k=0;k<len;k++)
safearray_inp.GetElement(&k,rxdata+k);//转换为BYTE型数组
for(k=0;k<len;k++) //将数组转换为Cstring型变量
{
BYTE bt=*(char*)(rxdata+k); //字符型
if(m_nInputMode == 2)
strtemp.Format("%02X ",bt); //将字符以十六进制方式送入临时变量strtemp存放，注意这里加入一个空隔
else
strtemp.Format("%c",bt); //将字符送入临时变量strtemp存放
m_strReceive = m_strReceive + strtemp; //加入接收编辑框对应字符串
}
m_strReceive += "\r\n";
}
}
UpdateData(FALSE); //更新编辑框内容
}
void CCommWizardDlg::OpenPort()
{
if(m_Com.GetPortOpen())
m_Com.SetPortOpen(FALSE);
m_Com.SetCommPort(m_nPort); //选择com1
if( !m_Com.GetPortOpen())
m_Com.SetPortOpen(TRUE);//打开串口
else
AfxMessageBox("cannot open serial port");
m_Com.SetSettings(m_strSettings); //波特率9600，无校验，8个数据位，1个停止位
m_Com.SetRThreshold(1);
//参数1表示每当串口接收缓冲区中有多于或等于1个字符时将引发一个接收数据的OnComm事件
m_Com.SetInputMode(1);
m_Com.SetInputLen(0); //设置当前接收区数据长度为0
m_Com.GetInput();//先预读缓冲区以清除残留数据
}
void CCommWizardDlg::OnManualsend()
{
// TODO: Add your control notification handler code here
CString strSend;
if(m_nInputMode > 1)
{
CByteArray hexdata;
int len=String2Hex(m_strSendString ,hexdata);
m_Com.SetOutput(COleVariant(hexdata));
}
else
m_Com.SetOutput(COleVariant(m_strSendString));//发送数据
}
void CCommWizardDlg::OnTimer(UINT nIDEvent)
{
// TODO: Add your message handler code here and/or call default
OnManualsend();
CDialog::OnTimer(nIDEvent);
}
int CCommWizardDlg::String2Hex(CString str, CByteArray &senddata)
{
int hexdata,lowhexdata;
int hexdatalen=0;
int len=str.GetLength();
senddata.SetSize(len/2);
for(int i=0;i<len;)
{
char lstr,hstr=str[i];
if(hstr==' ')
{
i++;
continue;
}
i++;
if(i>=len)
break;
lstr=str[i];
hexdata=ConvertHexChar(hstr);
lowhexdata=ConvertHexChar(lstr);
if((hexdata==16)||(lowhexdata==16))
break;
else
hexdata=hexdata*16+lowhexdata;
i++;
senddata[hexdatalen]=(char)hexdata;
hexdatalen++;
}
senddata.SetSize(hexdatalen);
return hexdatalen;
}
//这是一个将字符转换为相应的十六进制值的函数
//功能：若是在0-F之间的字符，则转换为相应的十六进制字符，否则返回-1
char CCommWizardDlg::ConvertHexChar(char ch)
{
if((ch>='0')&&(ch<='9'))
return ch-0x30;
else if((ch>='A')&&(ch<='F'))
return ch-'A'+10;
else if((ch>='a')&&(ch<='f'))
return ch-'a'+10;
else return (-1);
}
G. 急！！！单片机C语言实现串口通信编程
如果在字符数字发送框发0X00蜂铃器就会叫，如果发0xff蜂铃器就停叫。
#include <REG52.H>
#include <stdio.h>
sbit BEEP = P1^4;
unsigned char b;
void main (void) {
SCON = 0x50; //REN=1允许串行接受状态，串口工作模式1
TMOD|= 0x20; //定时器工作方式2
PCON|= 0x80;
//TH1 = 0xFD; //baud*2 /* reload value 19200、数据位8、停止位1。效验位无 (11.0592)
TH1 = 0xF3; // //baud*2 /* 波特率4800、数据位8、停止位1。效验位无 (12M)
TL1 = 0xF3;
TR1 = 1;
ES = 1; //开串口中断
EA = 1; // 开总中断
BEEP=1;
// IE = 0x0;
while(1)
{
if (RI) //RI接受中断标志
{ RI=0; //清除RI接受中断标志
b=SBUF; //SUBF接受/发送缓冲器
}
BEEP=b;
}
}
这个是个发送程序，接收程序类似，不懂可继续追问，一般人都是在别人程序基础上改改称为自己的，希望楼主能够自己研究出自己的一套编程理论
H. 编写单片机串口收发数据的完整程序（C语言编写）
我用的新唐芯片，8051内核，跟51差不多，望采纳
void UART_Initial (void)
{
P02_Quasi_Mode; //Setting UART pin as Quasi mode for transmit
P16_Quasi_Mode; //Setting UART pin as Quasi mode for transmit
SCON_1 = 0x50; //UART1 Mode1,REN_1=1,TI_1=1
T3CON = 0x08; //T3PS2=0,T3PS1=0,T3PS0=0(Prescale=1), UART1 in MODE 1
clr_BRCK;
RH3 = HIBYTE(65536 - (1000000/u32Baudrate)-1); /*16 MHz */
RL3 = LOBYTE(65536 - (1000000/u32Baudrate)-1); /*16 MHz */
set_TR3; //Trigger Timer3
}
以上是初始化的
void Send_Data_To_UART1(UINT8 c)
{
TI_1 = 0;
SBUF_1 = c;
while(TI_1==0);
}
这个是发送
void UART_isr (void) interrupt 4 //串行中断服务程序
{
if (RI_1==1)
{ /* if reception occur */
clr_RI_1; /* clear reception flag for next reception */
Receive_Date[c] = SBUF_1;
if (Receive_Date[0] == First_Date)
{
c++;
}
else if(Receive_Date_Size > 0 && Receive_Date_Size < 4)
{
c++;
}
else if(Receive_Date[c] == Last_Date && Receive_Date_Size ==4)
{
c = 0;
Flag_Receive_One = 1;
}
else
{
c = 0;
}
}
}
接收
I. 求一个C语言编程的简单串口接收数据程序，能让我参考一下
你好！！
给你一个完整的串口通讯例程，已经调试通过的！
J. Windows下的C语言串口编程
大概说下思路，串口在编程里相当于一个文件，因此要创建句柄来操作，还要给DCB结构休赋值进行串口配置等，你可以查下DCB结构体，记得在DOS下编程时，使用#include
<windows.h>。藏的深是为了更简单的使用。还有就是由于接受要一直进行检测，所以一般都专门开一线程进行监听。