unit ToolsCan;


  
interface

uses Windows, extctrls, {VarVar,} slcan,
   Messages, SysUtils, Variants, Classes, Graphics, Controls,
  Dialogs, StdCtrls, ComCtrls, Registry;

type
  tCanMsgStruct = Record
  m_dwID : DWORD;                 // CAN identifier
  m_bFF : BYTE;                   // CAN frame format
  m_bDLC : BYTE;                  // CAN data length code
  m_bData : array[1..8] of BYTE;  // CAN data
  m_dwTime : DWORD;               // Receipt time in ms
  end;


procedure OpenSlavna(speedcancode, select_port:integer);
procedure CloseSlavna();
procedure InitSlavnaDll();
function ReadMessageCanID(timerc:Integer):Integer;
procedure FreeSlavnaDll();
procedure SetFilterIDCan(m_dwID : DWORD);
function WriteMessageCanID(cb:integer; var outstr:string):Integer;


var

  arrspeedcan : array [0..4] of Word = (SLCAN_BR_100K,SLCAN_BR_CIA_125K,SLCAN_BR_CIA_250K,SLCAN_BR_CIA_500K,SLCAN_BR_CIA_1000K);
  //can
  devicecount:longword;
  hDevice:TSlCanDevice;
  br:TSlCanBitRate;
  OutMsg:TSlCanMessage;

  OutMsgArr:array[0..100] of TSlCanMessage;

//  InMsg:array [0..99] of TSlCanMessage;
  CanInitedDLL : Boolean = False;
  CanOpened : Boolean = False;

    InMsgCan : array [0..60000] of TSlCanMessage;
    InEventCan : array [0..60000] of TSlCanEvent;
    InEventCanTime : array [0..60000] of Longword;

    ReadCountCan:longword;

   ArrCanMessage : array [0..60000] of tCanMsgStruct;
   ArrCanMessageSend : array [0..30] of tCanMsgStruct;

   CanMessageTransmit : tCanMsgStruct;

   FilterIDCAN :  DWORD = 0;
   TimePauseCanIn : longword;

implementation



procedure SetFilterIDCan(m_dwID : DWORD);
begin

   FilterIDCAN :=  m_dwID;

end;



function WriteMessageCanID(cb:integer; var outstr:string):Integer ;
const
   cTxStatus:array [0..7] of string =('OK','TimeOut','BusOff','Abort','Disable','One shot error','Invalid mode','Unknown');
var
   i : Integer;
     WriteStatus:byte;
     WriteCount:Integer;

     b: Boolean;

begin

      for i:=0 to cb-1 do
      begin
          OutMsg.ID:=ArrCanMessageSend[i].m_dwID;
					OutMsg.Info:=SLCAN_MES_INFO_EXT;

					OutMsg.DataCount:= ArrCanMessageSend[0].m_bDLC; //8;

          OutMsg.Data[0]:=ArrCanMessageSend[i].m_bData[1];
          OutMsg.Data[1]:=ArrCanMessageSend[i].m_bData[2];
          OutMsg.Data[2]:=ArrCanMessageSend[i].m_bData[3];
          OutMsg.Data[3]:=ArrCanMessageSend[i].m_bData[4];
          OutMsg.Data[4]:=ArrCanMessageSend[i].m_bData[5];
          OutMsg.Data[5]:=ArrCanMessageSend[i].m_bData[6];
          OutMsg.Data[6]:=ArrCanMessageSend[i].m_bData[7];
          OutMsg.Data[7]:=ArrCanMessageSend[i].m_bData[8];

          OutMsgArr[i]:=OutMsg;

      end;

      if (SlCan_DeviceWriteMessages(hDevice,@OutMsgArr,cb,@WriteStatus)) then
      begin
          if WriteStatus > 7 then WriteStatus:=7;
          if WriteStatus = 0 then
            outstr:=Format('Status CAN = %s.',[cTxStatus[0]])
          else
            outstr:=Format('Status CAN = %s.',[cTxStatus[WriteStatus]])
      end
      else
      begin
         outstr:='  Transmit error';
         result:= 7;

      end;

      result:= WriteStatus;

{


      for i:=0 to cb-1 do
      begin

          OutMsg.ID:=ArrCanMessageSend[i].m_dwID;
          OutMsg.Info:=SLCAN_MES_INFO_EXT;
          OutMsg.DataCount:= 8;
          OutMsg.Data[0]:=ArrCanMessageSend[i].m_bData[1];
          OutMsg.Data[1]:=ArrCanMessageSend[i].m_bData[2];
          OutMsg.Data[2]:=ArrCanMessageSend[i].m_bData[3];
          OutMsg.Data[3]:=ArrCanMessageSend[i].m_bData[4];
          OutMsg.Data[4]:=ArrCanMessageSend[i].m_bData[5];
          OutMsg.Data[5]:=ArrCanMessageSend[i].m_bData[6];
          OutMsg.Data[6]:=ArrCanMessageSend[i].m_bData[7];
          OutMsg.Data[7]:=ArrCanMessageSend[i].m_bData[8];

          b:=SlCan_DeviceWriteMessages(hDevice,@OutMsg,1,@WriteStatus);

          if (not b) then
          begin
             result:=-1;
             exit ;
          end;

          // Проверим статус передачи
          if (WriteStatus<>SLCAN_TX_STATUS_OK) then
          begin
             result:=-2;
             exit;
          end;

      end;
      result := 0;
}
end;



function ReadMessageCanID(timerc:Integer):Integer ;
var
    b:longbool;
    k ,i , can1, can_error, can2 : Integer;
    deltat : Longword;
begin

 can_error:=0;
 TimePauseCanIn:=0;
 if CanOpened then
 begin

    for i:=0 to  60000-1 do
    begin
       InEventCanTime[i]:=0;
    end;


//    if (SlCan_DeviceSetStartTimeStamp(hDevice, 0)=False) then
//        exit;

//     b:=SlCan_DeviceReadMessages(hDevice,timerc,@InMsgCan,60000,@ReadCountCan);
//     b:=SlCan_DeviceReadEvents(hDevice,timerc,@InEventCan,60000,@ReadCountCan);
     b:=SlCan_DeviceReadEvents(hDevice,timerc,@InEventCan,1000,@ReadCountCan);

     if (not b) then
     begin
 //       CanMessage.m_dwID := 0;
        result:=0;
//        exit;
     end;

     if (ReadCountCan>0 ) then
     begin

        can1:=0;
        can2:=0;
        for i:=0 to  ReadCountCan-1 do
        begin

           if (InEventCan[i].EventType=0) then
           begin
             InMsgCan[can1] := InEventCan[i].Msg;

             deltat:=0;
             if (i>0) then
               deltat:=InEventCan[i].TimeStampLo - InEventCan[i-1].TimeStampLo
             else
               deltat:=0;

             inc(can1);

             if (deltat<>0) then
             begin
               InEventCanTime[can2]:= deltat;
               inc(can2);
               if (TimePauseCanIn<deltat) then TimePauseCanIn:=deltat;
             end;


           end
           else
           begin
             inc(can_error);
           end;

        end;

        k:=0;
        for i:=0 to  can1-1 do
        begin
         if ((FilterIDCAN>0) and ((InMsgCan[i].ID=FilterIDCAN) or (InMsgCan[i].ID=(FilterIDCAN+$01)) ))
            or  (FilterIDCAN=0) then
         begin

                 ArrCanMessage[k].m_dwID := InMsgCan[i].ID;

								 ArrCanMessage[k].m_bDLC := InMsgCan[i].DataCount;

								 ArrCanMessage[k].m_bData[1] := InMsgCan[i].Data[0];
                 ArrCanMessage[k].m_bData[2] := InMsgCan[i].Data[1];
                 ArrCanMessage[k].m_bData[3] := InMsgCan[i].Data[2];
                 ArrCanMessage[k].m_bData[4] := InMsgCan[i].Data[3];
                 ArrCanMessage[k].m_bData[5] := InMsgCan[i].Data[4];
                 ArrCanMessage[k].m_bData[6] := InMsgCan[i].Data[5];
                 ArrCanMessage[k].m_bData[7] := InMsgCan[i].Data[6];
                 ArrCanMessage[k].m_bData[8] := InMsgCan[i].Data[7];
								 Inc(k);

         end
         else
         begin

         end;


        end;
        result:=k;

//         InMsg.
     //   Writeln(Format('read %d messages',[ReadCount]));

     end
     else
     begin
   //     CanMessage.m_dwID := 0;
        result:=0;
     end;


{
        k:=0;
        for i:=0 to  ReadCountCan-1 do
        begin
         if ((FilterIDCAN>0) and ((InMsgCan[i].ID=FilterIDCAN) or (InMsgCan[i].ID=(FilterIDCAN+$01)) ))
            or  (FilterIDCAN=0) then
         begin

                 ArrCanMessage[k].m_dwID := InMsgCan[i].ID;
                 ArrCanMessage[k].m_bData[1] := InMsgCan[i].Data[0];
                 ArrCanMessage[k].m_bData[2] := InMsgCan[i].Data[1];
                 ArrCanMessage[k].m_bData[3] := InMsgCan[i].Data[2];
                 ArrCanMessage[k].m_bData[4] := InMsgCan[i].Data[3];
                 ArrCanMessage[k].m_bData[5] := InMsgCan[i].Data[4];
                 ArrCanMessage[k].m_bData[6] := InMsgCan[i].Data[5];
                 ArrCanMessage[k].m_bData[7] := InMsgCan[i].Data[6];
                 ArrCanMessage[k].m_bData[8] := InMsgCan[i].Data[7];
                 Inc(k);

         end
         else
         begin

         end;


        end;
        result:=k;

//         InMsg.
     //   Writeln(Format('read %d messages',[ReadCount]));

     end
     else
     begin
   //     CanMessage.m_dwID := 0;
        result:=0;
     end;
}

  end
  else
    Result:=0;

  if (can_error>100) then
      result:=1;

end;





procedure InitSlavnaDll();
var
   b:longbool;

begin

 // Загрузим библиотеку. Необходимо это сделать один раз
    // до вызова любой другой функции библиотеки.
    CanInitedDLL:=SlCan_Load(nil,nil);

end;



procedure FreeSlavnaDll();
var
   b:longbool;

begin

 // Загрузим библиотеку. Необходимо это сделать один раз
    // до вызова любой другой функции библиотеки.
    SlCan_Free(False);
    CanInitedDLL:=False;

end;


procedure OpenSlavna(speedcancode,select_port:integer);
var
   b:longbool;
begin

     if (not CanInitedDLL) then exit;

     if CanOpened then Exit;

    // Выясним, сколько устройств доступно
    devicecount:= SlCan_GetDeviceCount();
    if (devicecount=0) or (devicecount=INVALID_HANDLE_VALUE) or (devicecount=INVALID_HANDLE_VALUE-1) then exit;

    if (select_port>1) then
    begin
      if (select_port>devicecount)   then
         select_port:=devicecount;
    end
    else
      select_port:=1;
    // Получим ссылку на первое устройство
    hDevice:= SlCan_GetDevice(select_port-1);
    if (hDevice=INVALID_HANDLE_VALUE) then exit;

    // Откроем устройство.
    b:= SlCan_DeviceOpen(hDevice);
    if (not b) then exit;

    // При открытии устройства устанавливается максимально возможная
    // скорость передачи. Но мы установим 125kb/s
    br.BRP:=arrspeedcan[speedcancode];
    b:=SlCan_DeviceSetBitRate(hDevice,@br);
    if (not b) then exit;

    b:= SlCan_DeviceSetEventLevel(hDevice,SLCAN_EVT_LEVEL_TIME_STAMP);
    if (not b) then exit;


    // Установим режим SLCAN_MODE_NORMAL
    b:= SlCan_DeviceSetMode(hDevice,SLCAN_MODE_NORMAL);
    if (not b) then exit;


    b:= SlCan_DeviceSetTXTimeOut(hDevice,100);
    if (not b) then exit;

    CanOpened:=True;

end;


procedure CloseSlavna();
var
   b:longbool;
begin
 {
    // Выясним, сколько устройств доступно
    devicecount:= SlCan_GetDeviceCount();
    if (devicecount=0) then exit;

    // Получим ссылку на первое устройство
    hDevice:= SlCan_GetDevice(0);
}


    if (hDevice=INVALID_HANDLE_VALUE) then exit;

    // Закроем устройство.
    b:= SlCan_DeviceClose(hDevice);
    if (not b) then exit;

    CanOpened := False;
 {
    // При открытии устройства устанавливается максимально возможная
    // скорость передачи. Но мы установим 125kb/s
    br.BRP:=speedcan[rgBaudCAN.ItemIndex];
    b:=SlCan_DeviceSetBitRate(hDevice,@br);
    if (not b) then exit;

    // Установим режим SLCAN_MODE_NORMAL
    b:= SlCan_DeviceSetMode(hDevice,SLCAN_MODE_NORMAL);
    if (not b) then exit;
  }
end;







end.