Hi all,
I am using C++ (using the Dev C++ compiler) for serial port programming. Altough i m well versed in normal C/C++ programming,serial port communication is new to me. Thus before I start on my project what I usually do is source for some code on the net and get an idea on how to do it. I ve been trying to compile the below code but its always giving compilation errors like
"HANDLE does not name a type"
"BOOL does not name a type"
"DCB does not name a type"
"DWORD does not name a type"
"COMMTIMEOUTS does not name a type"
How should I get rid of these errors???
Is there an additional library that I should add??? My Dev C++ compiler has only the basic libraries that comes with the free online version.(Hehe... those features of Dev C++ were more than enough for me for 2/3 years)
I would greatly appreciate any help.
Heres the code
Serial.h
CODE
#define FC_DTRDSR 0x01
#define FC_RTSCTS 0x02
#define FC_XONXOFF 0x04
// ascii definitions
#define ASCII_BEL 0x07
#define ASCII_BS 0x08
#define ASCII_LF 0x0A
#define ASCII_CR 0x0D
#define ASCII_XON 0x11
#define ASCII_XOFF 0x13
HANDLE SerialInit(char*, int);
char SerialGetc(HANDLE*);
void SerialPutc(HANDLE*, char);
char* SerialGets(HANDLE*);
void SerialPuts(HANDLE*, char*);
void sleep(int);
--------------------------------------------------------------------------
Serial.cpp
CODE
#include <stdio.h>
#include <time.h>
//#define VC_EXTRALEAN // Exclude rarely-used stuff from Windows headers
#include <afxwin.h> // serial.cpp : Defines the entry point for the console application.
//#include "stdafx.h"
#include <string.h>
#include "serial.h"
// Flow control flags
#define FC_DTRDSR 0x01
#define FC_RTSCTS 0x02
#define FC_XONXOFF 0x04
// ascii definitions
#define ASCII_BEL 0x07
#define ASCII_BS 0x08
#define ASCII_LF 0x0A
#define ASCII_CR 0x0D
#define ASCII_XON 0x11
#define ASCII_XOFF 0x13
// variables used with the com port
BOOL bPortReady;
DCB dcb;
COMMTIMEOUTS CommTimeouts;
BOOL bWriteRC;
BOOL bReadRC;
DWORD iBytesWritten;
DWORD iBytesRead;
HANDLE SerialInit(char *ComPortName, int BaudRate)
{
HANDLE hCom;
hCom = CreateFile(ComPortName,
GENERIC_READ | GENERIC_WRITE,
0, // exclusive access
NULL, // no security
OPEN_EXISTING,
0, // no overlapped I/O
NULL); // null template
bPortReady = SetupComm(hCom, 2, 128); // set buffer sizes
bPortReady = GetCommState(hCom, &dcb);
dcb.BaudRate = BaudRate;
dcb.ByteSize = 8;
dcb.Parity = NOPARITY;
// dcb.Parity = EVENPARITY;
dcb.StopBits = ONESTOPBIT;
dcb.fAbortOnError = TRUE;
// set XON/XOFF
dcb.fOutX = FALSE; // XON/XOFF off for transmit
dcb.fInX = FALSE; // XON/XOFF off for receive
// set RTSCTS
dcb.fOutxCtsFlow = TRUE; // turn on CTS flow control
dcb.fRtsControl = RTS_CONTROL_HANDSHAKE; //
// set DSRDTR
dcb.fOutxDsrFlow = FALSE; // turn on DSR flow control
dcb.fDtrControl = DTR_CONTROL_ENABLE; //
// dcb.fDtrControl = DTR_CONTROL_DISABLE; //
// dcb.fDtrControl = DTR_CONTROL_HANDSHAKE; //
bPortReady = SetCommState(hCom, &dcb);
// Communication timeouts are optional
bPortReady = GetCommTimeouts (hCom, &CommTimeouts);
CommTimeouts.ReadIntervalTimeout = 5000;
CommTimeouts.ReadTotalTimeoutConstant = 5000;
CommTimeouts.ReadTotalTimeoutMultiplier = 1000;
CommTimeouts.WriteTotalTimeoutConstant = 5000;
CommTimeouts.WriteTotalTimeoutMultiplier = 1000;
bPortReady = SetCommTimeouts (hCom, &CommTimeouts);
return hCom;
}
char SerialGetc(HANDLE *hCom)
{
char rxchar;
BOOL bReadRC;
static DWORD iBytesRead;
bReadRC = ReadFile(*hCom, &rxchar, 1, &iBytesRead, NULL);
return rxchar;
}
void SerialPutc(HANDLE *hCom, char txchar)
{
BOOL bWriteRC;
static DWORD iBytesWritten;
bWriteRC = WriteFile(*hCom, &txchar, 1, &iBytesWritten,NULL);
}
char* SerialGets(HANDLE *hCom)
{
static char rxstring[256];
char c;
int pos = 0;
while(pos <= 255) {
c = SerialGetc(hCom);
if(c == '\r') continue; // discard carriage return
rxstring[pos++] = c;
if(c == '\n') break;
}
rxstring[pos] = 0;
return rxstring;
}
void SerialPuts(HANDLE *hCom, char *txstring)
{
BOOL bWriteRC;
static DWORD iBytesWritten;
bWriteRC = WriteFile(*hCom, txstring, strlen(txstring), &iBytesWritten,NULL);
}
void sleep( int _wait)
{
clock_t goal;
goal = clock() + _wait;
while( goal > clock() );
}
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