source: xtideuniversalbios/trunk/Serial_Server/win32/Win32Serial.cpp @ 215

//======================================================================
//
// Project:     XTIDE Universal BIOS, Serial Port Server
//
// File:        Win32Serial.cpp - Microsoft Windows serial code
//
// Support for the serial port under Win32.
// 

#include <stdio.h>

#include "..\library\library.h"
#include "Win32Serial.h"

COMMTIMEOUTS timeouts;

DCB dcb;

Win32Serial::~Win32Serial()
{
    if( pipe )
        CloseHandle( pipe );

    pipe = NULL;
}

Win32Serial::Win32Serial( char *name, struct baudRate *baudRate ) : Serial( name, baudRate )
{
    char buff1[20], buff2[1024];

    pipe = NULL;
    
    if( !name )
    {
        for( int t = 1; t <= 30 && !name; t++ )
        {
            sprintf( buff1, "COM%d", t );
            if( QueryDosDeviceA( buff1, buff2, sizeof(buff2) ) )
                name = buff1;
        }
        if( !name )
            log( -1, "No physical COM ports found" );
    }

    if( !strcmp( name, "PIPE" ) )
    {
        log( 0, "Opening named pipe %s (simulating %lu baud)", PIPENAME, baudRate->rate );
        
        pipe = CreateNamedPipeA( PIPENAME, PIPE_ACCESS_DUPLEX, PIPE_TYPE_BYTE|PIPE_REJECT_REMOTE_CLIENTS, 2, 1024, 1024, 0, NULL );
        if( !pipe )
            log( -1, "Could not CreateNamedPipe " PIPENAME );
        
        if( !ConnectNamedPipe( pipe, NULL ) )
            log( -1, "Could not ConnectNamedPipe" );

        if( baudRate->divisor > 3 )
            log( -1, "Cannot simulate baud rates with hardware multipliers" );

        speedEmulation = 1;
        resetConnection = 1;
    }
    else
    {
        if( QueryDosDeviceA( name, buff2, sizeof(buff2) ) )
        {
            log( 0, "Opening %s (%lu baud)", name, baudRate->rate );
            
            pipe = CreateFileA( name, GENERIC_READ|GENERIC_WRITE, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0 );
            if( !pipe )
                log( -1, "Could not Open \"%s\"", name );
            
            FillMemory(&dcb, sizeof(dcb), 0);
            dcb.DCBlength = sizeof(dcb);
            dcb.BaudRate = baudRate->rate;
            dcb.ByteSize = 8;
            dcb.StopBits = ONESTOPBIT;
            dcb.Parity = NOPARITY;
            if( !SetCommState( pipe, &dcb ) )
                log( -1, "Could not SetCommState" );

            if( !SetCommTimeouts( pipe, &timeouts ) )
                log( -1, "Could not SetCommTimeouts" );
        }
        else
        {
            char logbuff[ 1024 ];
            int found = 0;

            sprintf( logbuff, "serial port '%s' not found, detected COM ports:", name );

            for( int t = 1; t <= 40; t++ )
            {
                sprintf( buff1, "COM%d", t );
                if( QueryDosDeviceA( buff1, buff2, sizeof(buff2) ) )
                {
                    strcat( logbuff, "\n    " );
                    strcat( logbuff, buff1 );
                    found = 1;
                }
            }
            if( !found )
                strcat( logbuff, "\n    (none)" );

            log( -1, logbuff );
        }
    }
}

unsigned long Win32Serial::readCharacters( void *buff, unsigned long len )
{
    unsigned long readLen;
    int ret;
    ret = ReadFile( pipe, buff, len, &readLen, NULL );
    return( ret ? readLen : 0 );
}

unsigned long Win32Serial::writeCharacters( void *buff, unsigned long len )
{
    unsigned long writeLen;
    int ret;
    ret = WriteFile( pipe, buff, len, &writeLen, NULL );
    return( ret ? writeLen : 0 );
}