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问题描述
大家好我正在使用serialport programm,但在运行programmin时会出现以下错误。请问任何人请帮帮我
Hello every one i am working on serialport programm , but while running programmin its give the following error. Can any one please help me out please
/** Serial.cpp
*
*
*/
#include <iostream>
using namespace std;
#include <windows.h>
#include <tchar.h>
#include <crtdbg.h>
#include "serialtestdll.h"
int WINAPI _tWinMain
(
HINSTANCE /*hInst*/,
HINSTANCE /*hInstPrev*/,
LPTSTR /*lptszCmdLine*/,
int /*nCmdShow*/
){
}
Serial::Serial(tstring &commPortName, int baudeRate)
{
commHandle = CreateFile(commPortName.c_str(), GENERIC_READ|GENERIC_WRITE, 0,NULL, OPEN_EXISTING,
0, NULL);
if(commHandle == INVALID_HANDLE_VALUE)
{
throw("ERROR: Could not open com port");
}
else
{
// set timeouts
COMMTIMEOUTS cto = { MAXDWORD, 0, 10,100, 500};
DCB dcb;
if(!SetCommTimeouts(commHandle,&cto))
{
Serial::~Serial();
throw("ERROR: Could not set com port time-outs");
}
// set DCB
memset(&dcb,0,sizeof(dcb));
dcb.DCBlength = sizeof(dcb);
dcb.BaudRate = 9600;
dcb.fBinary = 1;
dcb.fDtrControl = DTR_CONTROL_ENABLE;
dcb.fRtsControl = RTS_CONTROL_ENABLE;
dcb.Parity = NOPARITY;
dcb.StopBits = ONESTOPBIT;
dcb.ByteSize = 8;
if(!SetCommState(commHandle,&dcb))
{
Serial::~Serial();
throw("ERROR: Could not set com port parameters");
}
}
}
Serial::~Serial()
{
CloseHandle(commHandle);
}
double Serial::write(const char *buffer)
{
char cmd[] = "!GV\r";
DWORD numWritten;
WriteFile(commHandle, cmd, 5, &numWritten, NULL);
return numWritten;
}
int Serial::write(const char *buffer, int buffLen)
{
char cmd[] = "!GV\r";
DWORD numWritten;
WriteFile(commHandle, cmd, 5, &numWritten, NULL);
return numWritten;
}
int Serial::read(char *buffer, int buffLen, bool nullTerminate)
{
DWORD numRead;
if(nullTerminate)
{
--buffLen;
}
BOOL ret = ReadFile(commHandle, buffer, buffLen, &numRead, NULL);
if(!ret)
{
return 0;
}
if(nullTerminate)
{
buffer[numRead] = '\r';
}
return numRead;
}
#define FLUSH_BUFFSIZE 10
void Serial::flush()
{
char buffer[FLUSH_BUFFSIZE];
int numBytes = read(buffer, FLUSH_BUFFSIZE, false);
while(numBytes != 0)
{
numBytes = read(buffer, FLUSH_BUFFSIZE, false);
}
}
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