C++（MFC）和PLC使⽤TCP通信程序
声明线程：
CWinThread *thread_recv;
static UINT server_thd(void*param);
定义线程：
thread_recv =AfxBeginThread(server_thd, this, THREAD_PRIORITY_NORMAL,0,0,NULL);
UINT CGigeCameraDemoDlg::server_thd(void*param)
{
CString Coil_number;
CString Materia_width;
CString Lead_postion;
CString Running_Speed;
CString Telegram_designation;
CString Telegram_counter;
CString Telegram_length;
WSADATA wsaData;
WORD wVersion;
wVersion =MAKEWORD(2,2);
WSAStartup(wVersion,&wsaData);
SOCKADDR_IN local_addr;
SOCKADDR_IN client_addr;
int iaddrSize =sizeof(SOCKADDR_IN);
int res;
char msg[1024];
CGigeCameraDemoDlg * dlg =(CGigeCameraDemoDlg *)AfxGetApp()->GetMainWnd();
local_addr.sin_family = AF_INET;
local_addr.sin_port =htons(28357);
local_addr.sin_addr.s_addr =htonl(INADDR_ANY);
if((listen_sock =socket(AF_INET, SOCK_STREAM, IPPROTO_TCP))== INVALID_SOCKET)
{
dlg->update("创建监听失败");
}
if(bind(listen_sock,(struct sockaddr*)&local_addr,sizeof(SOCKADDR_IN)))
{
dlg->update("绑定错误");
}
listen(listen_sock,1);
if((sock =accept(listen_sock,(struct sockaddr *)&client_addr,&iaddrSize))== INVALID_SOCKET)
{
dlg->update("accept 失败");
}
else
{
CString port;
port.Format(_T("%d"),int(ntohs(client_addr.sin_port)));
dlg->update("已连接来⾃："+CString(inet_ntoa(client_addr.sin_addr))+"  端⼝："+
port);
}
接收数据
while(1)
{
if((res =recv(sock, msg,1024,0))==-1)
{
dlg->update("失去连接");
dlg->update("失去连接");
break;
}
else
{
//msg[res] = '\0';
CString msg1;
CString msg_all;
for(int i =0; i < res; i++)
{
msg1.Format(_T("%X"), msg[i]);//转16进制读取
int length = msg1.GetLength();
if(length >2)
{
msg1 = msg1.Right(2);
}
else
{
if(length <2){
msg1 ="0"+ msg1;
}
}
msg_all += msg1;
}
//dlg->update(msg_all);
Telegram_designation = msg_all.Mid(0,8);
Telegram_counter = msg_all.Mid(8,8);
Telegram_length = msg_all.Mid(16,8);
Coil_number = msg_all.Mid(24,24);
Materia_width = msg_all.Mid(48,8);
Lead_postion = msg_all.Mid(56,8);
Running_Speed = msg_all.Mid(64,8);
dlg->update("卷号:"+ Coil_number +"  来料宽度："+ Materia_width +"  焊接头："+ Lead_postion +"  速度："+ Running_Speed); int td =HEXTOTEN(Telegram_designation);
int tc =HEXTOTEN(Telegram_counter);
int tl =HEXTOTEN(Telegram_length);
//std::cout << td << " " << tc << " " << tl << " ";
CString coil_all="";
for(int i =0;i <12; i++)
{
CString tmp = Coil_number.Mid(2*i,2);
int cn =HEXTOTEN(tmp);
CString cn1;
cn1.Format(_T("%c"), cn);//第⼀步的变量
coil_all.Format(_T("%s%s"), coil_all, cn1);
//std::wcout << "coil_all" << coil_all.GetBuffer() << " ";
}
dlg->m_value1.SetWindowText(coil_all);
coil_number = coil_all;
USES_CONVERSION;
int mw =HEXTOTEN(Materia_width);
int lp =HEXTOTEN(Lead_postion);
int rs =HEXTOTEN(Running_Speed);
int a =1557;
CString s;
s.Format(_T("%d"), mw);
dlg->m_value3.SetWindowText(s);
/
/int a =0x43160000; 下⾯两⾏代码来⾃于这个的灵感
//float b = *(float*)&a;
//printf("%f\n",b);
int n =strtol(T2A(Materia_width),NULL,16);
float b =*(float*)&n;
float b =*(float*)&n;
}
}
return0;
}
最后两句话就搞定了，在⽹上查了很多很多，终于摸索出来了。
转换代码
vector<bool>get_hex_2b(unsigned int a);
int get_hex_jiema(vector<bool> a);
float get_10dec(vector<bool> a);
int HEXTOTEN(CString s);
vector<bool>get_hex_2b(unsigned int a)//将⼗六进制转化成⼆进制
{
vector<bool> x;
for(int i =0; i <32; i++)
{
if((((int)a)&(0x80000000>> i)))
{
x.push_back(1);
}
else
{
x.push_back(0);
}
}
/打印⼗六进制的⼆进制码
//cout << "⼆进制码：" << endl;
//for_each(x.begin(), x.end(), fun);
/
/cout << endl;
///
return x;
}
int get_hex_jiema(vector<bool> a)//参数为短浮点数的⼆进制码
{
//将原来的⼆进制码的1-8位装到移码容器中
vector<bool>yima(a.begin()+1, a.begin()+9);
vector<bool>::iterator ite = yima.begin();//设置容器的迭代器
unsigned int sum =0;
//计算⼆进制代码表⽰的⼗进制数
for(int i =0; i <8; i++)
{
sum = sum +(*ite)*pow(2,7- i);
ite++;
}
int jiema = sum -127;
return jiema;
}
float get_10dec(vector<bool> a)//参数为短浮点数的⼆进制码
{
//存整数部分的⼆进制，初始值中有⼀个1，为尾码的隐含位
vector<bool>zhengshu(1,1);
vector<bool> xiaoshu;//存⼩数部分的⼆进制
//将原本的⼆进制代码的9-尾位装到尾码容器中
vector<bool>weima(a.begin()+9, a.end());
//根据阶码⼤⼩，向左移位尾码，得到整数的⼆进制代码
zhengshu.d(), weima.begin(), weima.begin()+get_hex_jiema(a));
//尾码的剩余部分为⼩数的⼆进制代码
xiaoshu.d(), weima.begin()+get_hex_jiema(a), d()); //
//打印整数和⼩数部分的⼆进制码
//cout << "整数部分:" << endl;
//for_each(zhengshu.begin(), d(), fun);
/
/cout << endl;
//cout << "⼩数部分:" << endl;
//for_each(xiaoshu.begin(), d(), fun);
//cout << endl;
/
float zheng_shu =0;
float xiao_shu =0;
float sum =0;
//计算整数的⼗进制⼤⼩cstring转为int
for(int i = zhengshu.size(); i >0; i--)
{
zheng_shu = zheng_shu + zhengshu[i -1]*pow(2, zhengshu.size()- i);
}
//计算⼩数的⼗进制⼤⼩
for(int i =0; i < xiaoshu.size(); i++)
{
xiao_shu = xiao_shu + xiaoshu[i]*pow(2,-(i +1));
}
sum = zheng_shu + xiao_shu;
//判断符号位
if(a[0]==1)
sum =0- sum;
return sum;
}
int HEXTOTEN(CString s)
{
USES_CONVERSION;
//LPWSTR ss1 = T2A(s);
int i =0, sum;
string sz2 =T2CA((LPCTSTR)s);
//string sz2 =s.GetBuffer();
int count123 = sz2.length();
sum =0;
for(i = count123 -1; i >=0; i--)//从⼗六进制个位开始，每位都转换成⼗进制
{
if(sz2[i]>='0'&&sz2[i]<='9')//数字字符的转换
{
sum +=(sz2[i]-48)*pow(16, count123 - i -1);
}
else if(sz2[i]>='A'&&sz2[i]<='F')//字母字符的转换
{
sum +=(sz2[i]-55)*pow(16, count123 - i -1);
}
}
return(sum);
//cout << sum;
}

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。