通过USB在PC和Arduino之间进行串行通信

Question

我有一些C++代码，我需要用于PC和Arduino之间的串行通信。文件"Serial.cpp"包含一个名为"stdafx.h"的文件，该文件在项目中或计算机上的任何地方都不存在，这显然会导致错误。 除此之外，我还遇到其他错误，例如C2065 'CSerial': undeclared identifier.

以下是项目中的三个文件：

Serial.h

#ifndef __SERIAL_H__
#define __SERIAL_H__
#pragma once
#include <Windows.h>
#include <memory.h>
#define FC_DTRDSR       0x01
#define FC_RTSCTS       0x02
#define FC_XONXOFF      0x04
#define ASCII_BEL       0x07
#define ASCII_BS        0x08
#define ASCII_LF        0x0A
#define ASCII_CR        0x0D
#define ASCII_XON       0x11
#define ASCII_XOFF      0x13
class CSerial
{
public:
CSerial();
~CSerial();
BOOL Open( int nPort = 2, int nBaud = 9600 );
BOOL Close( void );
int ReadData( void *, int );
int SendData( const char *, int );
int ReadDataWaiting( void );
BOOL IsOpened( void ){ return( m_bOpened ); }
protected:
BOOL WriteCommByte( unsigned char );
HANDLE m_hIDComDev;
OVERLAPPED m_OverlappedRead, m_OverlappedWrite;
bool m_bOpened;
};
#endif

串行.cpp

// Serial.cpp
#include "stdafx.h"
#include "Serial.h"

CSerial::CSerial()
{
memset( &m_OverlappedRead, 0, sizeof( OVERLAPPED ) );
memset( &m_OverlappedWrite, 0, sizeof( OVERLAPPED ) );
m_hIDComDev = NULL;
m_bOpened = false;
}
CSerial::~CSerial()
{
Close();
}
BOOL CSerial::Open( int nPort, int nBaud )
{
if( m_bOpened ) return( TRUE );
wchar_t szPort[15];
wchar_t szComParams[50];
DCB dcb;
wsprintf( szPort, L"COM%d", nPort );
m_hIDComDev = CreateFile( szPort, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL );
if( m_hIDComDev == NULL ) return( FALSE );
memset( &m_OverlappedRead, 0, sizeof( OVERLAPPED ) );
memset( &m_OverlappedWrite, 0, sizeof( OVERLAPPED ) );
COMMTIMEOUTS CommTimeOuts;
CommTimeOuts.ReadIntervalTimeout = 0xFFFFFFFF;
CommTimeOuts.ReadTotalTimeoutMultiplier = 0;
CommTimeOuts.ReadTotalTimeoutConstant = 0;
CommTimeOuts.WriteTotalTimeoutMultiplier = 0;
CommTimeOuts.WriteTotalTimeoutConstant = 5000;
SetCommTimeouts( m_hIDComDev, &CommTimeOuts );
wsprintf( szComParams, L"COM%d:%d,n,8,1", nPort, nBaud );
m_OverlappedRead.hEvent = CreateEvent( NULL, TRUE, FALSE, NULL );
m_OverlappedWrite.hEvent = CreateEvent( NULL, TRUE, FALSE, NULL );
dcb.DCBlength = sizeof( DCB );
GetCommState( m_hIDComDev, &dcb );
dcb.BaudRate = nBaud;
dcb.ByteSize = 8;
unsigned char ucSet;
ucSet = (unsigned char) ( ( FC_RTSCTS & FC_DTRDSR ) != 0 );
ucSet = (unsigned char) ( ( FC_RTSCTS & FC_RTSCTS ) != 0 );
ucSet = (unsigned char) ( ( FC_RTSCTS & FC_XONXOFF ) != 0 );
if( !SetCommState( m_hIDComDev, &dcb ) ||
!SetupComm( m_hIDComDev, 10000, 10000 ) ||
m_OverlappedRead.hEvent == NULL ||
m_OverlappedWrite.hEvent == NULL ){
DWORD dwError = GetLastError();
if( m_OverlappedRead.hEvent != NULL ) CloseHandle( m_OverlappedRead.hEvent );
if( m_OverlappedWrite.hEvent != NULL ) CloseHandle( m_OverlappedWrite.hEvent );
CloseHandle( m_hIDComDev );
return( FALSE );
}
m_bOpened = TRUE;
return( m_bOpened );
}
BOOL CSerial::Close( void )
{
if( !m_bOpened || m_hIDComDev == NULL ) return( TRUE );
if( m_OverlappedRead.hEvent != NULL ) CloseHandle( m_OverlappedRead.hEvent );
if( m_OverlappedWrite.hEvent != NULL ) CloseHandle( m_OverlappedWrite.hEvent );
CloseHandle( m_hIDComDev );
m_bOpened = FALSE;
m_hIDComDev = NULL;
return( TRUE );
}
BOOL CSerial::WriteCommByte( unsigned char ucByte )
{
BOOL bWriteStat;
DWORD dwBytesWritten;
bWriteStat = WriteFile( m_hIDComDev, (LPSTR) &ucByte, 1, &dwBytesWritten, &m_OverlappedWrite );
if( !bWriteStat && ( GetLastError() == ERROR_IO_PENDING ) ){
if( WaitForSingleObject( m_OverlappedWrite.hEvent, 1000 ) ) dwBytesWritten = 0;
else{
GetOverlappedResult( m_hIDComDev, &m_OverlappedWrite, &dwBytesWritten, FALSE );
m_OverlappedWrite.Offset += dwBytesWritten;
}
}
return( TRUE );
}
int CSerial::SendData( const char *buffer, int size )
{
if( !m_bOpened || m_hIDComDev == NULL ) return( 0 );
DWORD dwBytesWritten = 0;
int i;
for( i=0; i<size; i++ ){
WriteCommByte( buffer[i] );
dwBytesWritten++;
}
return( (int) dwBytesWritten );
}
int CSerial::ReadDataWaiting( void )
{
if( !m_bOpened || m_hIDComDev == NULL ) return( 0 );
DWORD dwErrorFlags;
COMSTAT ComStat;
ClearCommError( m_hIDComDev, &dwErrorFlags, &ComStat );
return( (int) ComStat.cbInQue );
}
int CSerial::ReadData( void *buffer, int limit )
{
if( !m_bOpened || m_hIDComDev == NULL ) return( 0 );
BOOL bReadStatus;
DWORD dwBytesRead, dwErrorFlags;
COMSTAT ComStat;
ClearCommError( m_hIDComDev, &dwErrorFlags, &ComStat );
if( !ComStat.cbInQue ) return( 0 );
dwBytesRead = (DWORD) ComStat.cbInQue;
if( limit < (int) dwBytesRead ) dwBytesRead = (DWORD) limit;
bReadStatus = ReadFile( m_hIDComDev, buffer, dwBytesRead, &dwBytesRead, &m_OverlappedRead );
if( !bReadStatus ){
if( GetLastError() == ERROR_IO_PENDING ){
WaitForSingleObject( m_OverlappedRead.hEvent, 2000 );
return( (int) dwBytesRead );
}
return( 0 );
}
return( (int) dwBytesRead );
}

串行示例.cpp

bool sendExample(int port, int baudRate)
{
char data[4];
CSerial* s = new CSerial();
if(!s->Open(port, baudRate))
{
std_out << _T("Could not open COM") << port << endl;
return false;
}

// Sending a string of 4 characters
data[0] = 0x31; 
data[1] = 0x32;
data[2] = 0x33;
data[3] = 0x0D; // ASCII CR
s->SendData(data, 4);
s->Close();
delete s;
}

有谁知道我该做什么？

Answer 1

stdafx.h 是 Visual Studio 的预编译标头。 因此，如果您不在Visual Studio中工作，则可以将其删除，它应该可以正常工作。

关于编译器不识别 CSerial 类 - 我没有看到你在 SerialExample 中包含"CSerial.h".cpp(即：#include"CSerial.h"(，但如果你这样做，这也可能是 CSerial 的症状.cpp不编译(虽然不太可能(......

希望这有帮助， 利奥尔