پورتهای سریال

sh_sepehr

Member
من یه سورس دارم که با C++ نوشته شده !! برای برقراری ارتباط با پورت سزیال ولی نمیدونم چی کارش کنم !! سورسو اینجا بطزارم کسی میتونه کمکم کنه ؟!!
لطفاًً جواب بدین
 
حالا تو بزار ...

من یه پروژه در باره ی Serial Ports ها داشتم ولی با VC++ انجام دادم . حالا بزار شاید یه فرجی شد ;)
 

sh_sepehr

Member
یه نگاه به این کد بنداز ! من دارم رو این کار میکنم :


کد:
void CTozinDlg::OnComm()
{
	static BYTE data[4];	// Data bytes of a packet
	static int i = 0;		// Index of next byte in the packet
	static bool bRdFlag = false;	// Flag for begining of a packet
	static short deci;	// Decimal points
	static int k_deci;	// Coefficient to make decimal points

	BYTE b;		// Current byte read from serial port
	COleVariant var;	// Ole variant to be converted to bytes

	// If Read threshold has passed (enough bytes are read)...
	if (m_comport.GetCommEvent() == RD_THREASHOLD)
		// White there are bytes in buffer
		while (m_comport.GetInBufferCount() > 0)
		{
			// Get data from input buffer
			var = m_comport.GetInput();
			var.ChangeType(VT_BSTR);	// Change data type to STR
			b = (BYTE) *(var.bstrVal);	// Convert to BYTE

			// Process the byte read from serial port
			if (b & 0x80)
			{	// Is this beggining of a new packet?
				bRdFlag = true;
				i = 0;	// Start from first data byte of packet
				
				// Set the status of motion lamp
				bool motion = b & 0x10;
				SetMotion(motion);

				// Set the status of zero lamp
				bool zero = b & 0x08
				m_zero_lamp.ShowWindow(zero ? SW_SHOW : SW_HIDE);
				
				// Set the decimal point variables
				deci = b & 0x07;	// Number of decimal points
				k_deci = pow(10, deci);

			} else if (bRdFlag)
			{	// Do we have an uncompleted packet?
				data[i] = b;	// Buffer data
				if (++i >= 4)
				{	// If all data bytes in packet are read
					//Calculate data from bytes
					long d = ((long) (0x07 & data[0])) << 21;
					d += ((long) (0x7F & data[1])) << 14;
					d += ((long) (0x7F & data[2])) << 7;
					d += (long) (0x7F & data[3]);
					if (data[0] & 0x08) d = -d;

					//Show data in box
					ShowWeight(d / k_deci);

					// Current packet is finished
					bRdFlag = false;
				}
			}
		}
}
ببین میتونی یه کاریش بکنی !! اصل برنامش رو هم خواستی میزارم برات !!!!
 

saalek110

Well-Known Member
اين سورسش

کد:
  /*------------------------------------------------------------------*
	  SERIAL.CPP

      The following code shows how to take advantage of some of
      the Turbo C++ extensions to the C++ language to do asynchronous
      communications without having to write supporting assembly-
      language routines.

      This program bypasses the less-than-adequate PC BIOS
      communications routines and installs a serial interrupt
      handler. Direct access to PC hardware allows the program to
      run at faster baud rates and eliminates the need for
      the main program to continuously poll the serial port for
      data; thus implementing background communications. Data that
      enters the serial port is stored in a circular buffer.

      * Compile this program with Test Stack Overflow OFF.

  *------------------------------------------------------------------*/

#include <dos.h>
#include <conio.h>
#include <stdio.h>
#include <string.h>
#include "serial.h"

#define VERSION 0x0101

#define FALSE           0
#define TRUE           (!FALSE)

#define NOERROR         0       /* No error               */
#define BUFOVFL         1       /* Buffer overflowed      */

#define ESC             0x1B    /* ASCII Escape character */
#define ASCII           0x007F  /* Mask ASCII characters  */
#define SBUFSIZ         0x4000  /* Serial buffer size     */

int            SError          = NOERROR;
int            portbase        = 0;
void           interrupt(*oldvects[2])(...);

static   char  ccbuf[SBUFSIZ];
unsigned int   startbuf        = 0;
unsigned int   endbuf          = 0;


/* Handle communications interrupts and put them in ccbuf */
void interrupt com_int(...)
{
    disable();
    if ((inportb(portbase + IIR) & RX_MASK) == RX_ID)
    {
        if (((endbuf + 1) & SBUFSIZ - 1) == startbuf)
            SError = BUFOVFL;

        ccbuf[endbuf++] = inportb(portbase + RXR);
        endbuf &= SBUFSIZ - 1;
    }

    /* Signal end of hardware interrupt */
    outportb(ICR, EOI);
    enable();
}

/* Output a character to the serial port */
serial& serial::operator<<( char x )
{
    long int           timeout = 0x0000FFFFL;

    outportb(portbase + MCR,  MC_INT | DTR | RTS);

    /* Wait for Clear To Send from modem */
    while ((inportb(portbase + MSR) & CTS) == 0)
        if (!(--timeout))
			return *this;

    timeout = 0x0000FFFFL;

    /* Wait for transmitter to clear */
    while ((inportb(portbase + LSR) & XMTRDY) == 0)
        if (!(--timeout))
			return *this;

    disable();
    outportb(portbase + TXR, x);
    enable();

	return *this;
}

/* Output a string to the serial port */
serial& serial::operator<<( char *string )
{
	while (*string)
	{
	   (*this) << *string;
	   string++;
	}
	return *this;
}

/* This routine returns the current value in the buffer */
serial &serial::operator>>( char &ch )
{
	if (endbuf == startbuf)
	{
		ch = -1;
		return *this;
	}

	ch = ccbuf[startbuf];
	startbuf++;
    startbuf %= SBUFSIZ;
	return *this;
}

/* Install our functions to handle communications */
void setvects(void)
{
    oldvects[0] = getvect(0x0B);
    oldvects[1] = getvect(0x0C);
    setvect(0x0B, com_int);
    setvect(0x0C, com_int);
}

/* Uninstall our vectors before exiting the program */
void resvects(void)
{
    setvect(0x0B, oldvects[0]);
    setvect(0x0C, oldvects[1]);
}

/* Turn on communications interrupts */
void i_enable(int pnum)
{
    int                c;

    disable();
    c = inportb(portbase + MCR) | MC_INT;
    outportb(portbase + MCR, c);
    outportb(portbase + IER, RX_INT);
    c = inportb(IMR) & (pnum == COM1 ? IRQ4 : IRQ3);
    outportb(IMR, c);
    enable();
}

/* Turn off communications interrupts */
void i_disable(void)
{
    int                c;

    disable();
    c = inportb(IMR) | ~IRQ3 | ~IRQ4;
    outportb(IMR, c);
    outportb(portbase + IER, 0);
    c = inportb(portbase + MCR) & ~MC_INT;
    outportb(portbase + MCR, c);
    enable();
}

/* Tell modem that we're ready to go */
void comm_on(void)
{
    int                c, pnum;

    pnum = (portbase == COM1BASE ? COM1 : COM2);
    i_enable(pnum);
    c = inportb(portbase + MCR) | DTR | RTS;
    outportb(portbase + MCR, c);
}

/* Go off-line */
void serial::comm_off(void)
{
    i_disable();
    outportb(portbase + MCR, 0);
}

void serial::init_serial(void)
{
    endbuf = startbuf = 0;
    setvects();
    comm_on();
}

serial::~serial()
{
    comm_off();
    resvects();
}

/* Set the port number to use */
int serial::SetPort(int Port)
{
    int                Offset, far *RS232_Addr;

    switch (Port)
    { /* Sort out the base address */
      case COM1 : Offset = 0x0000;
                  break;
      case COM2 : Offset = 0x0002;
                  break;
      default   : return (-1);
    }

	RS232_Addr = (int far *)MK_FP(0x0040, Offset);  /* Find out where the port is. */
    if (*RS232_Addr == NULL) return (-1);/* If NULL then port not used. */
    portbase = *RS232_Addr;              /* Otherwise set portbase      */

    return (0);
}

/* This routine sets the speed; will accept funny baud rates. */
/* Setting the speed requires that the DLAB be set on.        */
int serial::SetSpeed(int Speed)
{
    char		c;
    int		divisor;

    if (Speed == 0)            /* Avoid divide by zero */
        return (-1);
    else
        divisor = (int) (115200L/Speed);

    if (portbase == 0)
        return (-1);

    disable();
    c = inportb(portbase + LCR);
    outportb(portbase + LCR, (c | 0x80)); /* Set DLAB */
    outportb(portbase + DLL, (divisor & 0x00FF));
    outportb(portbase + DLH, ((divisor >> 8) & 0x00FF));
    outportb(portbase + LCR, c);          /* Reset DLAB */
    enable();

    return (0);
}

/* Set other communications parameters */
int serial::SetOthers(int Parity, int Bits, int StopBit)
{
    int                setting;

    if (portbase == 0)					return (-1);
    if (Bits < 5 || Bits > 8)				return (-1);
    if (StopBit != 1 && StopBit != 2)			return (-1);
    if (Parity != NO_PARITY && Parity != ODD_PARITY && Parity != EVEN_PARITY)
							return (-1);

    setting  = Bits-5;
    setting |= ((StopBit == 1) ? 0x00 : 0x04);
    setting |= Parity;

    disable();
    outportb(portbase + LCR, setting);
    enable();

    return (0);
}

/* Set up the port */
serial::serial(int Port, int Speed, int Parity, int Bits, int StopBit)
{
	flag = 0;
	if (SetPort(Port))
	  flag = -1;
	if (SetSpeed(Speed))
	  flag = -1;
	if (SetOthers(Parity, Bits, StopBit))
	  flag = -1;

	if (!flag)
	   init_serial();
}

/*  Control-Break interrupt handler */
int c_break(void)
{
    i_disable();
    fprintf(stderr, "\nStill online.\n");

    return(0);
}

main()
{
    /* Communications parameters */
	int        port     = COM2;
	int        speed    = 2400;
	int        parity   = NO_PARITY;
	int        bits     = 8;
	int        stopbits = 1;

	int        done  = FALSE;
	char       c;

	serial comport(port, speed, parity, bits, stopbits);

	ctrlbrk(c_break);

    fprintf(stdout, "TURBO C TERMINAL\n"
		    "...You're now in terminal mode, "
		    "press [ESC] to quit...\n\n");

    /*
       The main loop acts as a dumb terminal. We repeatedly
       check the keyboard buffer, and communications buffer.
    */
	do {
        if (kbhit())
        {
            /* Look for an Escape key */
            switch (c=getch())
            {
                case ESC: done = TRUE;  /* Exit program */
                          break;

                /* You may want to handle other keys here... */
			}
			if (!done)
				comport << c;
		}
		comport >> c;
		if (c != -1)
			fputc(c & ASCII, stdout);

    } while (!done && !SError);

    /* Check for errors */
    switch (SError)
    {
        case NOERROR: fprintf(stderr, "\nbye.\n");
					  return (0);

        case BUFOVFL: fprintf(stderr, "\nBuffer Overflow.\n");
					  return (99);

        default:      fprintf(stderr, "\nUnknown Error, SError = %d\n",
                              SError);
					  return (99);
    }
}


و اين هدرش:

کد:
/*---------------------------------------------------------------------*
   FILENAME:                     SERIAL.H

                  Some definitions used by SERIAL.C

 *--------------------------------------------------------------------*/

#define COM1            1
#define COM2            2
#define COM1BASE        0x3F8   /*  Base port address for COM1  */
#define COM2BASE        0x2F8   /*  Base port address for COM2  */

/*
    The 8250 UART has 10 registers accessible through 7 port addresses.
    Here are their addresses relative to COM1BASE and COM2BASE. Note
    that the baud rate registers, (DLL) and (DLH) are active only when
    the Divisor-Latch Access-Bit (DLAB) is on. The (DLAB) is bit 7 of
    the (LCR).

	o TXR Output data to the serial port.
	o RXR Input data from the serial port.
	o LCR Initialize the serial port.
	o IER Controls interrupt generation.
	o IIR Identifies interrupts.
	o MCR Send contorl signals to the modem.
	o LSR Monitor the status of the serial port.
	o MSR Receive status of the modem.
	o DLL Low byte of baud rate divisor.
	o DHH High byte of baud rate divisor.
*/
#define TXR             0       /*  Transmit register (WRITE) */
#define RXR             0       /*  Receive register  (READ)  */
#define IER             1       /*  Interrupt Enable          */
#define IIR             2       /*  Interrupt ID              */
#define LCR             3       /*  Line control              */
#define MCR             4       /*  Modem control             */
#define LSR             5       /*  Line Status               */
#define MSR             6       /*  Modem Status              */
#define DLL             0       /*  Divisor Latch Low         */
#define DLH             1       /*  Divisor latch High        */


/*-------------------------------------------------------------------*
  Bit values held in the Line Control Register (LCR).
	bit		meaning
	---		-------
	0-1		00=5 bits, 01=6 bits, 10=7 bits, 11=8 bits.
	2		Stop bits.
	3		0=parity off, 1=parity on.
	4		0=parity odd, 1=parity even.
	5		Sticky parity.
	6		Set break.
	7		Toggle port addresses.
 *-------------------------------------------------------------------*/
#define NO_PARITY       0x00
#define EVEN_PARITY     0x18
#define ODD_PARITY      0x08



/*-------------------------------------------------------------------*
  Bit values held in the Line Status Register (LSR).
	bit		meaning
	---		-------
	0		Data ready.
	1		Overrun error - Data register overwritten.
	2		Parity error - bad transmission.
	3		Framing error - No stop bit was found.
	4		Break detect - End to transmission requested.
	5		Transmitter holding register is empty.
	6		Transmitter shift register is empty.
	7               Time out - off line.
 *-------------------------------------------------------------------*/
#define RCVRDY          0x01
#define OVRERR          0x02
#define PRTYERR         0x04
#define FRMERR          0x08
#define BRKERR          0x10
#define XMTRDY          0x20
#define XMTRSR          0x40
#define TIMEOUT		0x80

/*-------------------------------------------------------------------*
  Bit values held in the Modem Output Control Register (MCR).
	bit     	meaning
	---		-------
	0		Data Terminal Ready. Computer ready to go.
	1		Request To Send. Computer wants to send data.
	2		auxillary output #1.
	3		auxillary output #2.(Note: This bit must be
			set to allow the communications card to send
			interrupts to the system)
	4		UART ouput looped back as input.
	5-7		not used.
 *------------------------------------------------------------------*/
#define DTR             0x01
#define RTS             0x02
#define MC_INT		0x08


/*------------------------------------------------------------------*
  Bit values held in the Modem Input Status Register (MSR).
	bit		meaning
	---		-------
	0		delta Clear To Send.
	1		delta Data Set Ready.
	2		delta Ring Indicator.
	3		delta Data Carrier Detect.
	4		Clear To Send.
	5		Data Set Ready.
	6		Ring Indicator.
	7		Data Carrier Detect.
 *------------------------------------------------------------------*/
#define CTS             0x10
#define DSR             0x20


/*------------------------------------------------------------------*
  Bit values held in the Interrupt Enable Register (IER).
	bit		meaning
	---		-------
	0		Interrupt when data received.
	1		Interrupt when transmitter holding reg. empty.
	2		Interrupt when data reception error.
	3		Interrupt when change in modem status register.
	4-7		Not used.
 *------------------------------------------------------------------*/
#define RX_INT          0x01


/*------------------------------------------------------------------*
  Bit values held in the Interrupt Identification Register (IIR).
	bit		meaning
	---		-------
	0		Interrupt pending
	1-2             Interrupt ID code
			00=Change in modem status register,
			01=Transmitter holding register empty,
			10=Data received,
			11=reception error, or break encountered.
	3-7		Not used.
 *------------------------------------------------------------------*/
#define RX_ID           0x04
#define RX_MASK         0x07


/*
    These are the port addresses of the 8259 Programmable Interrupt
    Controller (PIC).
*/
#define IMR             0x21   /* Interrupt Mask Register port */
#define ICR             0x20   /* Interrupt Control Port       */


/*
    An end of interrupt needs to be sent to the Control Port of
    the 8259 when a hardware interrupt ends.
*/
#define EOI             0x20   /* End Of Interrupt */


/*
    The (IMR) tells the (PIC) to service an interrupt only if it
    is not masked (FALSE).
*/
#define IRQ3            0xF7  /* COM2 */
#define IRQ4            0xEF  /* COM1 */


/*
    The (IMR) tells the (PIC) to service an interrupt only if it
    is not masked (FALSE).
*/
#define IRQ3            0xF7  /* COM2 */
#define IRQ4            0xEF  /* COM1 */


class serial
{
   int flag;
   int  SetSerial();
   int  SetOthers(int Parity, int Bits, int StopBit);
   int  SetSpeed(int Speed);
   int  SetPort(int Port);
   void init_serial(void);
   void comm_off(void);
public:
   serial(int Port, int Speed, int Parity, int Bits, int StopBit);
   serial &operator<<( char ch );
   serial &operator<<( char *str );
   serial &operator>>( char &ch );
   ~serial();
};
 

sh_sepehr

Member
خوب من نیمدونم با این چی کار کنم !! اون سورسی که دادم ماله یه برنامه است که به یه باسکول وصل میشه و وزن رو رو مانیتور نشون میده !! ولی این زیاد بدرد من نمیخوره ! بخاطر همین میخوام یسری تغییرات توش بدم !! C++ زیاد بلد نیستم ولی Vb بلدم ! میخاستم ببینم میشه اینو به Vb تبدیل کنم که همه تغییراتشو بدم ؟!!!
 

saalek110

Well-Known Member
راستش من با پورت تا حالا كار نكردم. نه در سي نه در وي بي.
اين سورس را هم گذاشتم شايد توابعش بدردت بخوره و خودم كار نكردم.
دوستان بهتر مي توانند كمك كنند.
.
 

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