/**
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******************************************************************************
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* @file : ModbusRTU.h
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* @brief : Header for ModbusRTU.c file.
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* This file contains the common defines of the ModbusRTU protocol.
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******************************************************************************
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*/
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#ifndef __MODBUSRTU_H__
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#define __MODBUSRTU_H__
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typedef unsigned char uchar;
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typedef unsigned short ushort;
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typedef unsigned char uint8_t;
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typedef unsigned short uint16_t;
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typedef int int32_t;
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/*
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enum enResult
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{
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S_OK = 0,
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S_ERR = 1,
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};
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*/
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enum enModbusRTUCmd
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{
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None =0,
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ReadCoils =1, //读线圈
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ReadInputs =2, //读离散量输入
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ReadKeepRegs =3, //读保持寄存器
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ReadInputRegs =4, //读输入寄存器
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WriteCoil = 5, //写单个线圈
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WriteReg =6, //写单个寄存器
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ReadExptStat = 7, //读取异常状态
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FetchCommEventCtr =11, //Fetch Comm Event Ctr
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// 12 Fetch Comm Event Log
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WriteCoils =15, //写多个线圈
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WriteRegs = 16, //写多个寄存器
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//17 Report Slave ID
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//20 Read General Reference
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//21 Write General Reference
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//22 Mask Write 4X Register
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// 23 Read/Write 4X Registers
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//24 Read FIFO Queue
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};
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#pragma anon_unions
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typedef struct tagModBusRTUReqPkg
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{
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uchar Dst;
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uchar Cmd;
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union {
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ushort Addr;
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struct {
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uchar AddrH;
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uchar AddrL;
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};
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};
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union
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{
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ushort nCount;
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struct
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{
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uchar CountH;
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uchar CountL;
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};
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};
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}stModBusRTUReqPkg, *pModBusRTUReqPkg;
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typedef struct tagModBusRTUReplyPkg
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{
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uchar Dst;
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uchar Cmd;
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uchar nByteCount;
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uchar Datas[1];
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}stModBusRTUReplyPkg, *pModBusRTUReplyPkg;
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//int ModBusCRC16(void * pBuf, int len1);
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uint16_t crc16tablefast(const uint8_t *ptr, uint16_t len);
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int ModBusSlaveCheckPkg(int nChn, void * pPkg, uint16_t len1);
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int ModBusSlaveParsePkg(int nChn, void * pPkg, uint16_t len1);
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#endif /* __MODBUSRTU_H__ */
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