linux平台实现modbus主机协议栈的动态库libMbpoll
libMbopll动态库是面向linux平台设计的modbus主机协议栈，可以运行在x86平台以及各种嵌入式linux平台；协议栈提供了简单明了的API接口提供给程序员进行应用层modbus主机程序开发;libMbopll库支持modbus协议所有功能码操作，兼容modbus tcp及modbus rtu;
#ifndef _Mbpoll_H
#define _Mbpoll_H
#include <stdint.h>
class cMbpoll
{
private:
void *mp;
unsigned int gettickcount();
unsigned int limittime;
void checklimit(void);
protected:
public:
void pollnewrtu(const char *device, int baud, char parity,int data_bit, int stop_bit);//Function modbus rtu new
void pollnewtcp(const char *ip_address, int port);//Function modbus tcp new
void poll_set_response_timeout(const struct timeval *timeout);//Function set response timeout
int poll_set_slave(int slave);//Function set slave id
int read_bits(int addr, int nb, uint8_t *dest);//Function 01 (01hex) Read Coils
int read_input_bits(int addr, int nb, uint8_t *dest);//Function 02 (02hex) Read Discrete Inputs
int read_registers(int addr, int nb, uint16_t *dest);//Function 03 (03hex) Read Holding Registers
int read_input_registers(int addr, int nb, uint16_t *dest);//Function 04 (04hex) Read Input Registers
int write_bit(int coil_addr, int status);//Function 05 (05hex) Write Single Coil
int write_register(int reg_addr, int value);//Function 06 (06hex) Write Single Register
int write_bits(int addr, int nb, const uint8_t *data);//Function 15 (0Fhex) Write Multiple Coils
int write_registers(int addr, int nb, const uint16_t *data);//Function 16 (10hex) Write Multiple Registers
int write_and_read_registers(int write_addr, int write_nb,const uint16_t *src, int read_addr, int read_nb,uint16_t *dest);//Function 23 (17hex) Read/Write multiple registers
cMbpoll();
~cMbpoll();
};
#endif
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