/**
  ******************************************************************************
  * @file           : ModbusRTU.h
  * @brief          : Header for ModbusRTU.c file.
  *                   This file contains the common defines of the ModbusRTU protocol.
  ******************************************************************************
	*/
#ifndef __MODBUSRTU_H__
#define __MODBUSRTU_H__

typedef unsigned char uchar;
typedef unsigned short ushort;
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef int int32_t;

/*
enum enResult
{
	S_OK = 0,
	S_ERR = 1,
};
*/
enum enModbusRTUCmd
{
	None =0,
	ReadCoils =1, //读线圈
	ReadInputs =2,  //读离散量输入
	ReadKeepRegs =3,	//读保持寄存器
	ReadInputRegs =4,	//读输入寄存器
	WriteCoil = 5,		//写单个线圈
	WriteReg =6,		//写单个寄存器
	ReadExptStat = 7,  //读取异常状态
	FetchCommEventCtr =11,   //Fetch Comm Event Ctr
													 // 12 Fetch Comm Event Log
													
	WriteCoils =15,				//写多个线圈
	WriteRegs = 16,		//写多个寄存器
										//17 Report Slave ID
										//20 Read General Reference
										//21 Write General Reference
										//22 Mask Write 4X Register
										// 23 Read/Write 4X Registers
										//24 Read FIFO Queue
	
};
#pragma anon_unions
typedef struct tagModBusRTUReqPkg
{
	uchar Dst;
	uchar Cmd;
	union	{
		ushort Addr;
		struct		{
			uchar AddrH;
			uchar AddrL;
		};
	};
	union
	{
		ushort nCount;
		struct 
		{
			uchar CountH;
			uchar CountL;
		};
	};
}stModBusRTUReqPkg, *pModBusRTUReqPkg;

typedef struct tagModBusRTUReplyPkg
{
	uchar Dst;
	uchar Cmd;
	uchar nByteCount;
	uchar Datas[1];
}stModBusRTUReplyPkg, *pModBusRTUReplyPkg;

//int ModBusCRC16(void * pBuf, int len1);
uint16_t crc16tablefast(const uint8_t *ptr, uint16_t len);

int ModBusSlaveCheckPkg(int nChn, void * pPkg, uint16_t len1);

int ModBusSlaveParsePkg(int nChn, void * pPkg, uint16_t len1);



#endif	/* __MODBUSRTU_H__ */