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KmboxB.h
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KmboxB.h
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#pragma once
#ifndef _COM_H_
#define _COM_H_
#pragma warning(disable: 4530)
#pragma warning(disable: 4786)
#pragma warning(disable: 4800)
#include <cmath>
#include <cassert>
#include <Winsock2.h>
#include <windows.h>
class _base_com //虚基类 基本串口接口
{
protected:
volatile int _port; //串口号
volatile HANDLE _com_handle;//串口句柄
char _com_str[20];
DCB _dcb; //波特率，停止位，等
COMMTIMEOUTS _co; // 超时时间
virtual bool open_port() = 0;
void init() //初始化
{
memset(_com_str, 0, 20);
memset(&_co, 0, sizeof(_co));
memset(&_dcb, 0, sizeof(_dcb));
_dcb.DCBlength = sizeof(_dcb);
_com_handle = INVALID_HANDLE_VALUE;
}
virtual bool setup_port()
{
if (!is_open())
return false;
if (!SetupComm(_com_handle, 8192, 8192))
return false; //设置推荐缓冲区
if (!GetCommTimeouts(_com_handle, &_co))
return false;
_co.ReadIntervalTimeout = 0xFFFFFFFF;
_co.ReadTotalTimeoutMultiplier = 0;
_co.ReadTotalTimeoutConstant = 0;
_co.WriteTotalTimeoutMultiplier = 0;
_co.WriteTotalTimeoutConstant = 2000;
if (!SetCommTimeouts(_com_handle, &_co))
return false; //设置超时时间
if (!PurgeComm(_com_handle, PURGE_TXABORT | PURGE_RXABORT | PURGE_TXCLEAR | PURGE_RXCLEAR))
return false; //清空串口缓冲区
return true;
}
inline void set_com_port(int port)
{
char p[12];
_port = port;
strcpy_s(_com_str, "\\\\.\\COM");
_ltoa_s(_port, p, 10);
strcat_s(_com_str, p);
}
public:
_base_com()
{
init();
}
virtual ~_base_com()
{
close();
}
//设置串口参数：波特率，停止位，等 支持设置字符串 "115200, 8, n, 1"
bool set_state(char* set_str)
{
if (is_open())
{
if (!GetCommState(_com_handle, &_dcb))
return false;
if (!BuildCommDCBA(set_str, &_dcb))
return false;
return SetCommState(_com_handle, &_dcb) == TRUE;
}
return false;
}
//设置内置结构串口参数：波特率，停止位
bool set_state(int BaudRate, int ByteSize = 8, int Parity = NOPARITY, int StopBits = ONESTOPBIT)
{
if (is_open())
{
if (!GetCommState(_com_handle, &_dcb))
return false;
_dcb.BaudRate = BaudRate;
_dcb.ByteSize = ByteSize;
_dcb.Parity = Parity;
_dcb.StopBits = StopBits;
return SetCommState(_com_handle, &_dcb) == TRUE;
}
return false;
}
//打开串口 缺省 115200, 8, n, 1
inline bool open(int port)
{
return open(port, 115200);
}
//打开串口 缺省 baud_rate, 8, n, 1
inline bool open(int port, int baud_rate)
{
if (port < 1 || port > 1024)
return false;
set_com_port(port);
if (!open_port())
return false;
if (!setup_port())
return false;
return set_state(baud_rate);
}
//打开串口
inline bool open(int port, char* set_str)
{
if (port < 1 || port > 1024)
return false;
set_com_port(port);
if (!open_port())
return false;
if (!setup_port())
return false;
return set_state(set_str);
}
inline bool set_buf(int in, int out)
{
return is_open() ? SetupComm(_com_handle, in, out) : false;
}
//关闭串口
inline virtual void close()
{
if (is_open())
{
CloseHandle(_com_handle);
_com_handle = INVALID_HANDLE_VALUE;
}
}
//判断串口是或打开
inline bool is_open()
{
return _com_handle != INVALID_HANDLE_VALUE;
}
//获得串口句炳
HANDLE get_handle()
{
return _com_handle;
}
operator HANDLE()
{
return _com_handle;
}
};
class _sync_com : public _base_com
{
protected:
//打开串口
virtual bool open_port()
{
if (is_open())
close();
_com_handle = CreateFileA(
_com_str,
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL
);
assert(is_open());
return is_open();//检测串口是否成功打开
}
public:
_sync_com()
{
}
//同步读
int read(char* buf, int buf_len)
{
if (!is_open())
return 0;
buf[0] = '\0';
COMSTAT stat;
DWORD error;
if (ClearCommError(_com_handle, &error, &stat) && error > 0) //清除错误
{
PurgeComm(_com_handle, PURGE_RXABORT | PURGE_RXCLEAR); /*清除输入缓冲区*/
return 0;
}
unsigned long r_len = 0;
buf_len = min(buf_len - 1, (int)stat.cbInQue);
if (!ReadFile(_com_handle, buf, buf_len, &r_len, NULL))
r_len = 0;
buf[r_len] = '\0';
return r_len;
}
//同步写
int write(char* buf, int buf_len)
{
if (!is_open() || !buf)
return 0;
DWORD error;
if (ClearCommError(_com_handle, &error, NULL) && error > 0) //清除错误
PurgeComm(_com_handle, PURGE_TXABORT | PURGE_TXCLEAR);
unsigned long w_len = 0;
if (!WriteFile(_com_handle, buf, buf_len, &w_len, NULL))
w_len = 0;
return w_len;
}
//同步写
inline int write(char* buf)
{
assert(buf);
return write(buf, strlen(buf));
}
};
class _asyn_com : public _base_com
{
protected:
OVERLAPPED _ro, _wo; // 重叠I/O
virtual bool open_port()
{
if (is_open())
close();
_com_handle = CreateFileA(
_com_str,
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, //重叠I/O
NULL
);
assert(is_open());
return is_open();//检测串口是否成功打开
}
public:
_asyn_com()
{
memset(&_ro, 0, sizeof(_ro));
memset(&_wo, 0, sizeof(_wo));
_ro.hEvent = CreateEvent(NULL, true, false, NULL);
assert(_ro.hEvent != INVALID_HANDLE_VALUE);
_wo.hEvent = CreateEvent(NULL, true, false, NULL);
assert(_wo.hEvent != INVALID_HANDLE_VALUE);
}
virtual ~_asyn_com()
{
close();
if (_ro.hEvent != INVALID_HANDLE_VALUE)
CloseHandle(_ro.hEvent);
if (_wo.hEvent != INVALID_HANDLE_VALUE)
CloseHandle(_wo.hEvent);
}
//异步读
int read(char* buf, int buf_len, int time_wait = 20)
{
if (!is_open())
return 0;
buf[0] = '\0';
COMSTAT stat;
DWORD error;
if (ClearCommError(_com_handle, &error, &stat) && error > 0) //清除错误
{
PurgeComm(_com_handle, PURGE_RXABORT | PURGE_RXCLEAR); /*清除输入缓冲区*/
return 0;
}
if (!stat.cbInQue)// 缓冲区无数据
return 0;
unsigned long r_len = 0;
buf_len = min((int)(buf_len - 1), (int)stat.cbInQue);
if (!ReadFile(_com_handle, buf, buf_len, &r_len, &_ro)) //2000 下 ReadFile 始终返回 True
{
if (GetLastError() == ERROR_IO_PENDING) // 结束异步I/O
{
WaitForSingleObject(_ro.hEvent, time_wait); //等待20ms
if (!GetOverlappedResult(_com_handle, &_ro, &r_len, false))
{
if (GetLastError() != ERROR_IO_INCOMPLETE)//其他错误
r_len = 0;
}
}
else
r_len = 0;
}
buf[r_len] = '\0';
return r_len;
}
//异步写
int write(char* buf, int buf_len)
{
if (!is_open())
return 0;
DWORD error;
if (ClearCommError(_com_handle, &error, NULL) && error > 0) //清除错误
PurgeComm(_com_handle, PURGE_TXABORT | PURGE_TXCLEAR);
unsigned long w_len = 0, o_len = 0;
if (!WriteFile(_com_handle, buf, buf_len, &w_len, &_wo))
if (GetLastError() != ERROR_IO_PENDING)
w_len = 0;
return w_len;
}
//异步写
inline int write(char* buf)
{
assert(buf);
return write(buf, strlen(buf));
}
};
//当接受到数据送到窗口的消息
#define ON_COM_RECEIVE WM_USER + 618 // WPARAM 端口号
class _thread_com : public _asyn_com
{
protected:
volatile HANDLE _thread_handle; //辅助线程
volatile HWND _notify_hwnd; // 通知窗口
volatile long _notify_num;//接受多少字节(>_notify_num)发送通知消息
volatile bool _run_flag; //线程运行循环标志
void (*_func)(int port);
OVERLAPPED _wait_o; //WaitCommEvent use
//线程收到消息自动调用, 如窗口句柄有效, 送出消息, 包含窗口编号
virtual void on_receive()
{
if (_notify_hwnd)
PostMessage(_notify_hwnd, ON_COM_RECEIVE, WPARAM(_port), LPARAM(0));
else
{
if (_func)
_func(_port);
}
}
//打开串口,同时打开监视线程
virtual bool open_port()
{
if (_asyn_com::open_port())
{
_run_flag = true;
DWORD id;
_thread_handle = CreateThread(NULL, 0, com_thread, this, 0, &id); //辅助线程
assert(_thread_handle);
if (!_thread_handle)
{
CloseHandle(_com_handle);
_com_handle = INVALID_HANDLE_VALUE;
}
else
return true;
}
return false;
}
public:
_thread_com()
{
_notify_num = 0;
_notify_hwnd = NULL;
_thread_handle = NULL;
_func = NULL;
memset(&_wait_o, 0, sizeof(_wait_o));
_wait_o.hEvent = CreateEvent(NULL, true, false, NULL);
assert(_wait_o.hEvent != INVALID_HANDLE_VALUE);
}
~_thread_com()
{
close();
if (_wait_o.hEvent != INVALID_HANDLE_VALUE)
CloseHandle(_wait_o.hEvent);
}
//设定发送通知, 接受字符最小值
void set_notify_num(int num)
{
_notify_num = num;
}
int get_notify_num()
{
return _notify_num;
}
//送消息的窗口句柄
inline void set_hwnd(HWND hWnd)
{
_notify_hwnd = hWnd;
}
inline HWND get_hwnd()
{
return _notify_hwnd;
}
inline void set_func(void (*f)(int))
{
_func = f;
}
//关闭线程及串口
virtual void close()
{
if (is_open())
{
_run_flag = false;
SetCommMask(_com_handle, 0);
SetEvent(_wait_o.hEvent);
if (WaitForSingleObject(_thread_handle, 100) != WAIT_OBJECT_0)
TerminateThread(_thread_handle, 0);
CloseHandle(_com_handle);
CloseHandle(_thread_handle);
_thread_handle = NULL;
_com_handle = INVALID_HANDLE_VALUE;
ResetEvent(_wait_o.hEvent);
}
}
/*辅助线程控制*/
//获得线程句柄
HANDLE get_thread()
{
return _thread_handle;
}
//暂停监视线程
bool suspend()
{
return _thread_handle != NULL ? SuspendThread(_thread_handle) != 0xFFFFFFFF : false;
}
//恢复监视线程
bool resume()
{
return _thread_handle != NULL ? ResumeThread(_thread_handle) != 0xFFFFFFFF : false;
}
//重建监视线程
bool restart()
{
if (_thread_handle) /*只有已有存在线程时*/
{
_run_flag = false;
SetCommMask(_com_handle, 0);
SetEvent(_wait_o.hEvent);
if (WaitForSingleObject(_thread_handle, 100) != WAIT_OBJECT_0)
TerminateThread(_thread_handle, 0);
CloseHandle(_thread_handle);
_run_flag = true;
_thread_handle = NULL;
DWORD id;
_thread_handle = CreateThread(NULL, 0, com_thread, this, 0, &id);
return (_thread_handle != NULL); //辅助线程
}
return false;
}
private:
//监视线程
static DWORD WINAPI com_thread(LPVOID para)
{
_thread_com* pcom = (_thread_com*)para;
if (!SetCommMask(pcom->_com_handle, EV_RXCHAR | EV_ERR))
return 0;
COMSTAT stat;
DWORD error;
for (DWORD length, mask = 0; pcom->_run_flag && pcom->is_open(); mask = 0)
{
if (!WaitCommEvent(pcom->_com_handle, &mask, &pcom->_wait_o))
{
if (GetLastError() == ERROR_IO_PENDING)
{
GetOverlappedResult(pcom->_com_handle, &pcom->_wait_o, &length, true);
}
}
if (mask & EV_ERR) // == EV_ERR
ClearCommError(pcom->_com_handle, &error, &stat);
if (mask & EV_RXCHAR) // == EV_RXCHAR
{
ClearCommError(pcom->_com_handle, &error, &stat);
if (stat.cbInQue > pcom->_notify_num)
pcom->on_receive();
}
}
return 0;
}
};
typedef _thread_com _com; //名称简化
#endif //_COM_H_