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84 lines
3.1 KiB
84 lines
3.1 KiB
/*
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* modbus_backend.h
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*
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* Change Logs:
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* Date Author Notes
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* 2024-04-01 qiyongzhong first version
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*/
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#ifndef __MODBUS_BACKEND_H__
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#define __MODBUS_BACKEND_H__
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#include "modbus_cfg.h"
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#include "typedef.h"
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#define MB_BKD_ACK_TMO_MS_DEF 300
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#define MB_BKD_BYTE_TMO_MS_DEF 32
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typedef enum{
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MB_BACKEND_TYPE_RTU = 0,//RTU后端
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MB_BACKEND_TYPE_TCP, //TCP后端
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MB_BACKEND_TYPE_SOCK //SOCK后端
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}mb_backend_type_t;//后端类型定义
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typedef struct{
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char *dev; //设备名
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int baudrate; //波特率
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int parity; //校验位
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int pin; //收发控制引脚, <0 表示不使用
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int lvl; //发送控制电平
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}mb_backend_param_rtu_t;//RTU后端参数定义
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typedef struct{
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char *host; //ip地址或域名
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int port; //端口
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}mb_backend_param_tcp_t;//TCP后端参数定义
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typedef struct{
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int fd; //socket连接标识符
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}mb_backend_param_sock_t;//SOCK后端参数定义
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typedef union{
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mb_backend_param_rtu_t rtu; //RTU后端参数
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mb_backend_param_tcp_t tcp; //TCP后端参数
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mb_backend_param_sock_t sock; //SOCK后端参数
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}mb_backend_param_t;//后端参数联合体定义
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//打开, 成功返回实例指针或文件标识, 错误返回NULL
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typedef void * (* mb_bkd_ops_open_t)(const mb_backend_param_t *param);
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//关闭, 成功返回0, 错误返回-1
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typedef int (* mb_bkd_ops_close_t)(void *hinst);
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//接收数据, 返回接收到的数据长度, 0表示超时, 错误返回-1
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typedef int (* mb_bkd_ops_read_t)(void *hinst, u8 *buf, int bufsize);
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//发送数据, , 返回成功发送的数据长度, 错误返回-1
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typedef int (* mb_bkd_ops_write_t)(void *hinst, u8 *buf, int size);
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//清空接收缓存, 成功返回0, 错误返回-1
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typedef int (* mb_bkd_ops_flush_t)(void *hinst);
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typedef struct{
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mb_bkd_ops_open_t open;
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mb_bkd_ops_close_t close;
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mb_bkd_ops_read_t read;
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mb_bkd_ops_write_t write;
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mb_bkd_ops_flush_t flush;
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}mb_backend_ops_t;
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typedef struct{
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mb_backend_type_t type;//类型
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mb_backend_param_t param;//配置参数
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const mb_backend_ops_t *ops;//操作函数集
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int ack_tmo_ms;//应答超时
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int byte_tmo_ms;//字节间隔超时
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void *hinst;//实例指针或文件标识
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}mb_backend_t;
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mb_backend_t *mb_backend_create(mb_backend_type_t type, const mb_backend_param_t *param);//创建后端, 成功返回后端指针, 失败返回NULL
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void mb_backend_destory(mb_backend_t *backend);//销毁后端
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int mb_backend_open(mb_backend_t *backend);//打开后端, 成功返回0, 错误返回-1
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int mb_backend_close(mb_backend_t *backend);//关闭后端, 成功返回0, 错误返回-1
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int mb_backend_config(mb_backend_t *backend, int ack_tmo_ms, int byte_tmo_ms);//配置后端超时参数, 成功返回0, 错误返回-1
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int mb_backend_read(mb_backend_t *backend, u8 *buf, int bufsize);//从后端读数据, 返回读取到数据长度, 0表示超时, 错误返回-1
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int mb_backend_write(mb_backend_t *backend, u8 *buf, int size);//向后端写数据, 返回已发送数据长度, 错误返回-1
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int mb_backend_flush(mb_backend_t *backend);//清空后端接收缓存, 成功返回0, 错误返回-1
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#endif
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