1、ModbusRTU和ModbusTCP协议模板-本页仅作为文档封面,使用时请直接删除即可-内页可以根据需求调整合适字体及大小-Modbus-RTU和Modbus-TCP协议模板(C语言)(总33页)Modbus-RTU和Modbus-TCP协议模板(C语言)简介:在单片机内部实现modbus协议,可以简单地将变量的值映射到modbus寄存器地址,这种方法是高效的,但是有以下缺点:1、通常不支持一条指令操作多个变量(寄存器);2、可移植性较差。本模板使用8位数组模拟modbus寄存器。06,10指令均对数组进行写操作,同时记录寄存器的写入操作,在其他地方定时判断“写入标志”,将“写入标志”置位的
2、“模拟寄存器”的值转移到相关变量,或进行其他操作。03指令读取最新数据,要求定时将变量的值写入“模拟寄存器”。本模板缺点是占用资源较多、效率较低,优点是完整支持了modbus的03,06,10指令。Modbus-RTU简介:1、Modbus读寄存器指令(0x03)地址(1B) +功能码(1B) +起始地址(2B) +寄存器数量(2B) +CRC(2B)返回:地址(1B) +功能码(1B) +字节数(1B) +数据值(2*“寄存器数量” Bytes或者“字节数”) +CRC(2B)2、Modbus写单个寄存器指令(0x06)地址(1B)+功能码(1B)+寄存器地址(2B)+数据值(2B)+CRC
3、(2B)返回:地址(1B)+功能码(1B)+寄存器地址(2B)+数据值(2B)+CRC(2B) (返回与发送的指令相同)3、Modbus写多个寄存器指令(0x10)地址(1B) +功能码(1B) +起始地址(2B) +写寄存器数量(2B n) +字节计数(1B n*2) +数据(n*2 B) +CRC(2B)返回:地址(1B) +功能码(1B) +起始地址(2B) +写寄存器数量(2B) +CRC(2B)Modbus-TCP简介:在MODBUS-RTU前添加6个字节,并删除MODBUS-RTU的CRC校验。示例指令:0051 0000 0009 01 10 0001 0001 02 00 00
4、 6个字节部分称为“MBAP报文头”示例:0051 0000 00090051 是客户端发出的校验信息,服务端原内容返回即可0000 表示modbus-tcp协议0009 表示后面还有9个字节后面部分:01 10 0001 0001 02 00 00 01 设备地址10 表示10指令0001 起始地址0001 写寄存器数量02 字节计数00 00 数据响应指令:0051 0000 0006 01 10 0001 0001:#ifndef _SYSTEM_H_#define _SYSTEM_H_#include /= 不常改动项 =/* 第505、506、507行已经定义了u32,u16和u8
5、*/typedef unsigned char u8;/typedef unsigned short int u16;/typedef unsigned int u32;/typedef unsigned char INT8U;/typedef unsigned short int INT16U;/typedef unsigned int INT32U;/typedef signed char int8_t;/typedef signed short int int16_t;/typedef signed int int32_t;/typedef signed long long int in
6、t64_ttypedef unsigned long long int u64;typedef unsigned char bool_t;#define FALSE 0#define TRUE !FALSE#define NULL 0#endif#ifndef _CRC_CHECK_H_#define _CRC_CHECK_H_#include u16 CRC16_Verify(u8 *puchMsg,u16 usDataLen);#endif#include /* 高位表*/static const u8 auchCRCHi = 0x00,0xC1, 0x81, 0x40, 0x01, 0x
7、C0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80,0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
8、 0x01, 0xC0, 0x80, 0x41, 0x00,0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80,0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,0x8
9、0, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00,0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80,0x41, 0x01, 0xC0, 0x80, 0x41, 0x00,
10、0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00,0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x4
11、0, 0x01, 0xC0, 0x80,0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00,0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 ;/* 低位表*/stat
12、ic const u8 auchCRCLo = 0x00,0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04,0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, 0x08,0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D,0x1C
13、, 0xDC, 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3, 0x11,0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37,0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A, 0x3B,0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0
14、xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E,0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26, 0x22,0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62,0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D
15、, 0xAF, 0x6F, 0x6E,0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B,0x7A, 0xBA, 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5, 0x77,0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0, 0x50, 0x90, 0x91, 0x51,0x93, 0x53, 0x
16、52, 0x92, 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C, 0x5D,0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88, 0x48,0x49, 0x89, 0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C, 0x44,0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82,
17、 0x42, 0x43, 0x83, 0x41, 0x81, 0x80, 0x40;/* 16位CRC校验函数,查表法*/u16 CRC16_Verify(u8 *puchMsg,u16 usDataLen) u8 uchCRCHi = 0xFF ; u8 uchCRCLo = 0xFF ; u16 uIndex ; while (usDataLen-) uIndex = uchCRCHi *puchMsg+ ; uchCRCHi = uchCRCLo auchCRCHiuIndex ; uchCRCLo = auchCRCLouIndex ; / return (u16)(uchCRCLo)
18、 8) | uchCRCHi) ; return (u16)(uchCRCHi) = MODBUS_BUFFER_LEN/2) return 0; for(i=start; i=end; i+) if(Modbus_WRecordi/8 & (u8)1= MODBUS_BUFFER_LEN/2) return; if(sta) for(i=start; i=end; i+) Modbus_WRecordi/8 |= (u8)1(i%8); else for(i=start; i=end; i+) Modbus_WRecordi/8 &= (u8)1 MODBUS_BUFFER_LEN) ret
19、urn 0; p_data = Modbus_Buffer + addr; for(i=0; i MODBUS_BUFFER_LEN) return 0; p_save = Modbus_Buffer + addr; for(i=0; ilength; i+) p_savei = bufferi; return 1;/*-* 16位变量存储顺序转换-*/u16 Modbus_16BitsSwapEndian(u16 num) if(Modbus_Swap_Endian) return num8; else return num;/*-* 32位变量存储顺序转换-*/typedef union char arr4; int32_t int32; float f;MODBUS_UNION32;u32 Modbus_32BitsSwapEndian(u32 num) u8 temp; MODBUS_UNION32 res; if(Modbus_Swap_Endian) = num; temp = 0; 0 = 3; 3 = temp; temp = 1; 1 = 2; 2 = temp; return ; else return num;/*-
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