copyZ_zmodbus/zmodbus_common.h

#pragma once

#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>

/*定义Modbus的操作功能码，支持01、02、03、04、05、06、15、16功能码*/
typedef enum {
  // ReadCoilStatus 读线圈状态（读多个输出位的状态）
  ModbusOrder01 = 0x01,
  // ReadInputStatus 读输入位状态（读多个输入位的状态）
  ModbusOrder02 = 0x02,
  // ReadHoldingRegister 读保持寄存器（读多个保持寄存器的数值）
  ModbusOrder03 = 0x03,
  // ReadInputRegister 读输入寄存器（读多个输入寄存器的数值）
  ModbusOrder04 = 0x04,
  // WriteSingleCoil 强制单个线圈（强制单个输出位的状态）
  ModbusOrder05 = 0x05,
  // WriteSingleRegister 预制单个寄存器（设定一个寄存器的数值）
  ModbusOrder06 = 0x06,
  // WriteMultipleCoil 强制多个线圈（强制多个输出位的状态）
  ModbusOrder0F = 0x0F,
  // WriteMultipleRegister 预制多个寄存器（设定多个寄存器的数值）
  ModbusOrder10 = 0x10,
  // ReadFileRecord 读文件记录
  ModbusOrder14 = 0x14,
  // WriteFileRecord 写文件记录
  ModbusOrder15 = 0x15,
  // MaskWriteRegister 屏蔽写寄存器
  ModbusOrder16 = 0x16,
  // ReadWriteMultiRegister 读写多个寄存器
  ModbusOrder17 = 0x17,
  // ReadDeviceID读设备识别码
  ModbusOrder2B = 0x2B,
} ModbusFunctionCode;

/*定义接收到指令检测错误时的错误码*/
typedef enum {
  Modbus_OK = 0x00,
  InvalidFunctionCode = 0x01,   //不合法功能代码
  IllegalDataAddress = 0x02,    //非法的数据地址
  IllegalDataValues = 0x03,     //非法的数据值或者范围
  SlaveFailure = 0x04,          //从站设备故障
  Acknowledgement = 0x05,       //确认
  SlaveDeviceBusy = 0x06,       //从属设备忙
  MemoryParityError = 0x08,     //存储奇偶性差错
  GatewayDisabled = 0x0A,       //不可用网关路径
  GatewayResponseFailed = 0x0B  //网关目标设备响应失败
} ModbusStatus;

typedef struct {
  uint8_t deviceid;
  ModbusFunctionCode functionCode;
  union {
    /**********read************/
    struct {
      uint16_t startbit;  // bit
      uint16_t numbit;    // bit
    } O01;                // ReadCoilStatus
    struct {
      uint16_t startbit;  // bit
      uint16_t numbit;    // bit
    } O02;                // ReadInputStatus
    struct {
      uint16_t startreg;  // byte
      uint16_t numreg;    // reg(一个reg==16bit)
    } O03;                // ReadInputStatus
    struct {
      uint16_t startreg;  // byte
      uint16_t numreg;    // reg(一个reg==16bit)
    } O04;                // ReadInputStatus
    /**********write************/
    struct {
      uint16_t startbit;  // bit
      uint16_t numbit;    // bit
      uint8_t bytenum;
      uint8_t *bit;
    } O0F;  // WriteMultipleCoil
    struct {
      uint16_t startreg;  // byte
      uint16_t numreg;    // byte
      uint8_t bytenum;    // numreg*2
      uint8_t *reg;
    } O10;  // WriteMultipleCoil
  } d;
} ModbusMasterData_t;

typedef struct {
  ModbusFunctionCode functionCode;
  uint8_t deviceId;
  union {
    /**********read_receipt************/
    struct {
      uint8_t bytenum;  // bit
      uint8_t *byte_table;
    } O01;  // ReadCoilStatus
    struct {
      uint8_t bytenum;  // byte_table
      uint8_t *byte_table;
    } O02;  // ReadInputStatus
    struct {
      uint8_t bytenum;  // byte
      uint8_t *reg;
    } O03;  // ReadInputStatus
    struct {
      uint8_t bytenum;  // byte
      uint8_t *reg;
    } O04;  // ReadInputStatus
    /**********write_receipt************/
    struct {
      uint16_t startbit;
      uint16_t bitnum;  // bit
    } O0F;              // WriteMultipleCoil-->对应01
    struct {
      uint16_t startreg;
      uint16_t regnum;  // byte
    } O10;              // --->对应03
  } d;
} ModbusSlaveData_t;

void ZGenerateCRC16CheckCodeToPacket(uint8_t *puckMsg, uint8_t packetlen);
uint16_t ZGenerateCRC16CheckCode(uint8_t *puckMsg, uint8_t usDataLen);
bool ZCheckRTUMessageIntegrity(uint8_t *message, uint8_t length);