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https://github.com/emqx/neuron.git
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fengzero
134 lines
4.1 KiB
C
134 lines
4.1 KiB
C
/**
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* NEURON IIoT System for Industry 4.0
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* Copyright (C) 2020-2021 EMQ Technologies Co., Ltd All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**/
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#ifndef _NEU_MODBUS_H_
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#define _NEU_MODBUS_H_
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#include <stdbool.h>
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#include <stdint.h>
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#include <sys/queue.h>
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typedef enum modbus_function {
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MODBUS_READ_COIL = 0x1, // bit
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MODBUS_READ_INPUT_CONTACT = 0x02, // bit
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MODBUS_READ_HOLD_REG = 0x03, // word
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MODBUS_READ_INPUT_REG = 0x04, // word
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MODBUS_WRITE_S_COIL = 0x05, // bit
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MODBUS_WRITE_S_HOLD_REG = 0x06, // word
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MODBUS_WRITE_M_HOLD_REG = 0x10, // bit
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MODBUS_WRITE_M_COIL = 0x0F // word
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} modbus_function_e;
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typedef enum modbus_area {
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MODBUS_AREA_COIL = 0,
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MODBUS_AREA_INPUT = 1,
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MODBUS_AREA_INPUT_REGISTER = 3,
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MODBUS_AREA_HOLD_REGISTER = 4,
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} modbus_area_e;
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typedef enum modbus_endian {
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MODBUS_ENDIAN_UNDEFINE = -1,
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MODBUS_ENDIAN_BIG4321 = 0,
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MODBUS_ENDIAN_BIG3412 = 1,
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MODBUS_ENDIAN_LITTLE1234 = 2,
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MODBUS_ENDIAN_LITTLE2143 = 3
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} modbus_endian_e;
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struct modbus_header {
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uint16_t process_no;
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uint16_t flag;
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uint16_t len;
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} __attribute__((packed));
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struct modbus_code {
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uint8_t device_address;
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uint8_t function_code;
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} __attribute__((packed));
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struct modbus_pdu_read_request {
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uint16_t start_addr;
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uint16_t n_reg;
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} __attribute__((packed));
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struct modbus_pdu_read_response {
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uint8_t n_byte;
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uint8_t byte[];
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} __attribute__((packed));
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struct modbus_pdu_s_write_request {
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uint16_t start_addr;
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uint16_t value;
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} __attribute__((packed));
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struct modbus_pdu_m_write_request {
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uint16_t start_addr;
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uint16_t n_reg;
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uint8_t n_byte;
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uint8_t byte[];
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} __attribute__((packed));
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struct modbus_pdu_write_response {
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uint16_t start_addr;
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uint16_t n_reg;
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} __attribute__((packed));
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typedef enum modbus_data_type {
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MODBUS_B8 = 1,
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MODBUS_B16 = 2,
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MODBUS_B32 = 4,
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} modbus_data_type_t;
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typedef struct modbus_data {
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enum modbus_data_type type;
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union {
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uint8_t val_u8;
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int16_t val_i16;
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int32_t val_i32;
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uint16_t val_u16;
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uint32_t val_u32;
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float val_f32;
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} val;
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modbus_endian_e endian;
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} modbus_data_t;
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int modbus_read_req_with_head(char *buf, uint16_t id, uint8_t device,
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modbus_function_e function_code, uint16_t addr,
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uint16_t n_reg);
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int modbus_read_req(char *buf, uint8_t device_address,
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modbus_function_e function_code, uint16_t addr,
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uint16_t n_reg);
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int modbus_s_write_req_with_head(char *buf, uint8_t device_address,
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modbus_function_e function_code, uint16_t addr,
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uint16_t value);
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int modbus_s_write_req(char *buf, uint8_t device_address,
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modbus_function_e function_code, uint16_t addr,
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uint16_t value);
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int modbus_m_write_req_with_head(char *buf, uint8_t device_address,
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modbus_function_e function_code, uint16_t addr,
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uint16_t n_reg, struct modbus_data *mdata);
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int modbus_m_write_req(char *buf, uint8_t device_address,
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modbus_function_e function_code, uint16_t addr,
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uint16_t n_reg, struct modbus_data *mdata);
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#endif |