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80 lines
1.4 KiB
C
80 lines
1.4 KiB
C
/**
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* @file agile_modbus_rtu.h
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* @brief Agile Modbus 软件包 RTU 头文件
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* @author 马龙伟 (2544047213@qq.com)
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* @date 2021-12-02
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*
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* @attention
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*
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* <h2><center>© Copyright (c) 2021 Ma Longwei.
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* All rights reserved.</center></h2>
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*
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*/
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#ifndef __PKG_AGILE_MODBUS_RTU_H
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#define __PKG_AGILE_MODBUS_RTU_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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/** @addtogroup RTU
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* @{
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*/
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/** @defgroup RTU_Exported_Constants RTU Exported Constants
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* @{
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*/
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#define AGILE_MODBUS_RTU_HEADER_LENGTH 1
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#define AGILE_MODBUS_RTU_PRESET_REQ_LENGTH 6
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#define AGILE_MODBUS_RTU_PRESET_RSP_LENGTH 2
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#define AGILE_MODBUS_RTU_CHECKSUM_LENGTH 2
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/**
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@verbatim
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Modbus_Application_Protocol_V1_1b.pdf Chapter 4 Section 1 Page 5
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RS232 / RS485 ADU = 253 bytes + slave (1 byte) + CRC (2 bytes) = 256 bytes
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@endverbatim
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*/
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#define AGILE_MODBUS_RTU_MAX_ADU_LENGTH 256
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/**
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* @}
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*/
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/** @defgroup RTU_Exported_Types RTU Exported Types
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* @{
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*/
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/**
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* @brief RTU 结构体
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*/
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typedef struct agile_modbus_rtu {
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agile_modbus_t _ctx; /**< modbus 句柄 */
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} agile_modbus_rtu_t;
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/**
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* @}
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*/
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/** @addtogroup RTU_Exported_Functions
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* @{
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*/
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int agile_modbus_rtu_init(agile_modbus_rtu_t *ctx, uint8_t *send_buf, int send_bufsz, uint8_t *read_buf, int read_bufsz);
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/**
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* @}
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*/
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* __PKG_AGILE_MODBUS_RTU_H */
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