File content as of revision 1:dcf2f8359398:

//---------------------------------------------------------------------------
// Copyright (C) 2000 Dallas Semiconductor Corporation, All Rights Reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY,  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL DALLAS SEMICONDUCTOR BE LIABLE FOR ANY CLAIM, DAMAGES
// OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//
// Except as contained in this notice, the name of Dallas Semiconductor
// shall not be used except as stated in the Dallas Semiconductor
// Branding Policy.
//---------------------------------------------------------------------------
//
//  TODO.C - COM functions required to communicate with the DS2480 based
//           Universal Serial Adapter 'U'.  Fill in the platform specific code.
//
//  Version: 2.00
//
//  History: 1.00 -> 1.01  Added function msDelay.
//
//           1.01 -> 1.02  Changed to generic OpenCOM/CloseCOM for easier
//                         use with other platforms.
//
//           1.02 -> 1.03  Removed caps in #includes for Linux capatibility
//                         Add function msGettick()
//           1.03 -> 2.00  Changed 'MLan' to 'ow'. Added support for
//                         multiple ports.
//

#include "onewire_config.h"

#include "ownet.h"
#include "mbed.h"
#include <string> 
using namespace std;


Serial comport( ONEWIRE_TX , ONEWIRE_RX );  // tx, rx


// exportable functions required
SMALLINT OpenCOM(int,char *);
SMALLINT WriteCOM(int,int,uchar *);
void     FlushCOM(int);
int      ReadCOM(int,int,uchar *);
void     BreakCOM(int);
void     SetBaudCOM(int,int);
void     CloseCOM(int);
long     msGettick(void);
void     msDelay(int);
SMALLINT owHasPowerDelivery(int);
SMALLINT owHasOverDrive(int);
SMALLINT owHasProgramPulse(int);
SMALLINT owWriteBytePower(int,SMALLINT);
SMALLINT owReadBitPower(int,SMALLINT);


//---------------------------------------------------------------------------
// Attempt to open a com port.  Keep the handle in ComID.
// Set the starting baud rate to 9600.
//
// 'portnum'   - number 0 to MAX_PORTNUM-1.  This number provided will
//               be used to indicate the port number desired when calling
//               all other functions in this library.
//
// 'port_zstr' - zero terminate port name.  For this platform
//               use format COMX where X is the port number.
//
//
// Returns: TRUE(1)  - success, COM port opened
//          FALSE(0) - failure, could not open specified port
//
SMALLINT OpenCOM(int portnum, char *port_zstr)
{
    comport.baud( 9600);
    return 1;
}

//---------------------------------------------------------------------------
// Attempt to open a com port.  Keep the handle in ComID.
// Set the starting baud rate to 9600.
//
// 'portnum'   - number 0 to MAX_PORTNUM-1.  This number provided will
//               be used to indicate the port number desired when calling
//               all other functions in this library.
//
//
// Returns: the port number if it was successful otherwise -1
//
int OpenCOMEx(char *port_zstr)
{
    int portnum = -1;

    if ( port_zstr[0] == '0')
    {
        portnum = 0;
    }

    if ( port_zstr[0] == '1')
        {
            portnum = 1;
        }
        
     if ( port_zstr[0] == '2')
    {
        portnum = 2;
    }

    if ( port_zstr[0] == '3')
        {
            portnum = 3;
        }    

   if(!OpenCOM(portnum, port_zstr))
   {
      return -1;
   }

   return portnum;
}

//---------------------------------------------------------------------------
// Closes the connection to the port.
//
// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
//              OpenCOM to indicate the port number.
//
void CloseCOM(int portnum)
{
   // add platform specific code here - Done
}

//---------------------------------------------------------------------------
// Flush the rx and tx buffers
//
// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
//              OpenCOM to indicate the port number.
//
void FlushCOM(int portnum)
{
   // add platform specific code here - Done
   while( comport.readable() )  
   {
        comport.getc();
   }
}

//--------------------------------------------------------------------------
// Write an array of bytes to the COM port, verify that it was
// sent out.  Assume that baud rate has been set.
//
// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
//              OpenCOM to indicate the port number.
// 'outlen'   - number of bytes to write to COM port
// 'outbuf'   - pointer ot an array of bytes to write
//
// Returns:  TRUE(1)  - success
//           FALSE(0) - failure
//
SMALLINT WriteCOM(int portnum, int outlen, uchar *outbuf)
{
   // add platform specific code here - Done
    for ( int x=0; x < outlen; x++ )
    {
        comport.putc( outbuf[x]);
    }
    
    while ( (LPC_UART3->LSR & 0x40) == 0 );
    {
    }

/*            
    printf ("\r\n Sent Data: ");
    for ( int x=0; x < outlen; x++ )
    {
        printf ( " %X ", outbuf[x] );
    }    
    printf ("\r\n");
*/    
    return 1;
}

//--------------------------------------------------------------------------
// Read an array of bytes from the COM port, verify that it was
// received.  Assume that baud rate has been set.
//
// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
//               OpenCOM to indicate the port number.
// 'inlen'     - number of bytes to read from COM port
// 'inbuf'     - pointer to a buffer to hold the incoming bytes
//
// Returns: number of characters read
//
int ReadCOM(int portnum, int inlen, unsigned char *inbuf)
{
    // add platform specific code here - Done
    string buffer ("");
    Timer t;
    int numchar = 0;

    t.start();  // Start timeout timer

    while ( t.read_ms() < 1000 )  // If we haven't timed out....
    {
        if ( comport.readable() )
        {
            int read = comport.getc();

            buffer += read;
            numchar++;
            t.reset();        
        }
        
        if (numchar == inlen)
        {
            break;  
        }
    }

    buffer.copy( (char*)inbuf, numchar );
/*    
    printf ("\r\n Received Data: ");
    for ( int x=0; x < numchar; x++ )
    {
        printf ( " %X ", inbuf[x] );
    }   
    printf ("\r\n");
*/     
    return numchar;
}


//--------------------------------------------------------------------------
// Send a break on the com port for at least 2 ms
//
// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
//               OpenCOM to indicate the port number.
//
void BreakCOM(int portnum)
{
    // add platform specific code here - Done
    int time_BREAK = 2;

    // BREAK
    LPC_UART3->LCR |= 0x40;
    wait_ms( time_BREAK);
         
    // MARK AFTER BREAK         
    LPC_UART3->LCR &= ~(0x40);
}

//--------------------------------------------------------------------------
// Set the baud rate on the com port.
//
// 'portnum'   - number 0 to MAX_PORTNUM-1.  This number was provided to
//               OpenCOM to indicate the port number.
// 'new_baud'  - new baud rate defined as
//                PARMSET_9600     0x00
//                PARMSET_19200    0x02
//                PARMSET_57600    0x04
//                PARMSET_115200   0x06
//
void SetBaudCOM(int portnum, int new_baud)
{
   // add platform specific code here
}

//--------------------------------------------------------------------------
//  Description:
//     Delay for at least 'len' ms
//
void msDelay(int len)
{
   // add platform specific code here
    wait_ms( len );
}

//--------------------------------------------------------------------------
// Get the current millisecond tick count.  Does not have to represent
// an actual time, it just needs to be an incrementing timer.
//
long msGettick(void)
{
   // add platform specific code here
   return 0;
}

/*
//--------------------------------------------------------------------------
// This procedure indicates wether the adapter can deliver power.
//
// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
//              OpenCOM to indicate the port number.
//
// Returns:  TRUE  if adapter is capable of delivering power.
//
SMALLINT owHasPowerDelivery(int portnum)
{
   // add adapter specific code here
   return TRUE;
}

//--------------------------------------------------------------------------
// This procedure indicates wether the adapter can deliver power.
//
// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
//              OpenCOM to indicate the port number.
//
// Returns:  TRUE  if adapter is capable of over drive.
//
SMALLINT owHasOverDrive(int portnum)
{
   // add adapter specific code here
   return TRUE;
}
//--------------------------------------------------------------------------
// This procedure creates a fixed 480 microseconds 12 volt pulse
// on the 1-Wire Net for programming EPROM iButtons.
//
// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
//              OpenCOM to indicate the port number.
//
// Returns:  TRUE  program volatage available
//           FALSE program voltage not available
SMALLINT owHasProgramPulse(int portnum)
{
   // add adapter specific code here
   return TRUE;
}


//--------------------------------------------------------------------------
// Send 8 bits of communication to the 1-Wire Net and verify that the
// 8 bits read from the 1-Wire Net is the same (write operation).
// The parameter 'sendbyte' least significant 8 bits are used.  After the
// 8 bits are sent change the level of the 1-Wire net.
//
// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
//              OpenCOM to indicate the port number.
// 'sendbyte' - 8 bits to send (least significant byte)
//
// Returns:  TRUE: bytes written and echo was the same
//           FALSE: echo was not the same
//
SMALLINT owWriteBytePower(int portnum, SMALLINT sendbyte)
{
   // replace if platform has better implementation (faster response)
   if (!owHasPowerDelivery(portnum))
      return FALSE;

   if(owTouchByte(portnum,sendbyte) != sendbyte)
      return FALSE;

   if(owLevel(portnum,MODE_STRONG5) != MODE_STRONG5)
      return FALSE;

   return TRUE;
}


//--------------------------------------------------------------------------
// Send 1 bit of communication to the 1-Wire Net and verify that the
// response matches the 'applyPowerResponse' bit and apply power delivery
// to the 1-Wire net.  Note that some implementations may apply the power
// first and then turn it off if the response is incorrect.
//
// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
//              OpenCOM to indicate the port number.
// 'applyPowerResponse' - 1 bit response to check, if correct then start
//                        power delivery
//
// Returns:  TRUE: bit written and response correct, strong pullup now on
//           FALSE: response incorrect
//
SMALLINT owReadBitPower(int portnum, SMALLINT applyPowerResponse)
{
   // replace if platform has better implementation (faster response)
   if (!owHasPowerDelivery(portnum))
      return FALSE;

   if(owTouchBit(portnum,0x01) != applyPowerResponse)
      return FALSE;

   if(owLevel(portnum,MODE_STRONG5) != MODE_STRONG5)
      return FALSE;

   return TRUE;
}

*/