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// Copyright 2005-2008, various authors
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#ifndef _PROTOCOL_MODBUS_MASTER_H
#define _PROTOCOL_MODBUS_MASTER_H
/* To set/reset single coil with function 5 */
#define MODBUS_BIT_OFF 0x0000
#define MODBUS_BIT_ON 0xFF00
#define LGT_MODBUS_IP_HEADER 7
/* Function codes list */
#define MODBUS_FC_READ_COILS 1
#define MODBUS_FC_READ_INPUTS 2
#define MODBUS_FC_READ_HOLD_REGS 3
#define MODBUS_FC_READ_INPUT_REGS 4
#define MODBUS_FC_FORCE_COIL 5
#define MODBUS_FC_WRITE_REG 6
#define MODBUS_FC_FORCE_COILS 15
#define MODBUS_FC_WRITE_REGS 16
#define MODBUS_FC_DIAGNOSTICS 8
#define MODBUS_FC_EXCEPTION_BIT 0x80
/* Exceptions list */
#define MODBUS_ILLEGAL_FUNCTION 0x01
#define MODBUS_ILLEGAL_DATA_ADDRESS 0x02
#define MODBUS_ILLEGAL_DATA_VALUE 0x03
#define MODBUS_SLAVE_DEVICE_FAILURE 0x04
#define MODBUS_SLAVE_DEVICE_BUSY 0x06
#define MODBUS_NEGATIVE_ACKNOWLEDGE 0x07
#define MODBUS_MEMORY_PARITY_ERROR 0x08
// Request type
#define MODBUS_REQ_INPUTS_READ 0
#define MODBUS_REQ_COILS_WRITE 1
#define MODBUS_REQ_REGISTERS_READ 2
#define MODBUS_REQ_REGISTERS_WRITE 3
#define MODBUS_REQ_COILS_READ 4
#define MODBUS_REQ_HOLD_READ 5
#define MODBUS_REQ_DIAGNOSTICS 6
// mapping variable type
#define B_VAR 0
#define Q_VAR 1
#define I_VAR 2
#define W_VAR 0
#define QW_VAR 1
#define IW_VAR 2
#define LGT_SLAVE_ADR 25
#define NBR_MODBUS_MASTER_REQ 16/*50: problem with GTK config window: adding vertical scroll else required*/
typedef struct StrModbusMasterReq
{
/* IP address or IP:port or slave number for serial */
/* if '\0' => req not defined */
char SlaveAdr[ LGT_SLAVE_ADR ];
char TypeReq; /* see MODBUS_REQ_ list */
int FirstModbusElement;
int NbrModbusElements;
char LogicInverted;
int OffsetVarMapped;
}StrModbusMasterReq;
void InitModbusMasterBeforeReadConf( void );
void PrepareModbusMaster( void );
void InitModbusMasterParams( void );
int GetModbusResponseLenghtToReceive( void );
int ModbusMasterAsk( unsigned char * SlaveAddressIP, unsigned char * Question );
char TreatModbusMasterResponse( unsigned char * Response, int LgtResponse );
void SetVarFromModbus( StrModbusMasterReq * ModbusReq, int ModbusNum, int Value );
int GetVarForModbus( StrModbusMasterReq * ModbusReq, int ModbusNum );
#endif
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