67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
/*
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* Доступ к окнам Modbus-регистров через один classic CAN-кадр ProtoCAN. Сервер сопоставляет
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* команду с банком и диапазоном регистров; чтение и запись значений выполняет предоставленный
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* приложением интерфейс.
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*/
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/**
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* @file pcan_modbus_server.h
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* @brief Modbus register windows transported in one classic ProtoCAN frame.
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*/
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#ifndef PCAN_MODBUS_SERVER_H
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#define PCAN_MODBUS_SERVER_H
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#include <stdbool.h>
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#include <stdint.h>
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#include "pcan_frame.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef enum {
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PCAN_MODBUS_COIL = 0x4U,
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PCAN_MODBUS_DISCRETE = 0x5U,
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PCAN_MODBUS_HOLDING = 0x6U,
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PCAN_MODBUS_INPUT = 0x7U
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} pcan_modbus_bank_t;
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typedef bool (*pcan_modbus_read_fn)(void *user, pcan_modbus_bank_t bank,
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uint16_t address, uint16_t *value);
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typedef bool (*pcan_modbus_write_fn)(void *user, pcan_modbus_bank_t bank,
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uint16_t address, uint16_t value);
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typedef struct {
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uint8_t device_type;
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uint8_t device_id;
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pcan_modbus_read_fn read;
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pcan_modbus_write_fn write;
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void *user;
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uint32_t requests;
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uint32_t responses;
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uint32_t rejected;
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} pcan_modbus_server_t;
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typedef enum {
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PCAN_MODBUS_NOT_FOR_US = 0,
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PCAN_MODBUS_HANDLED_NO_RESPONSE,
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PCAN_MODBUS_RESPONSE
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} pcan_modbus_result_t;
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bool pcan_modbus_server_init(pcan_modbus_server_t *server,
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uint8_t device_type, uint8_t device_id,
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pcan_modbus_read_fn read,
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pcan_modbus_write_fn write, void *user);
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/** Zero DLC reads; data writes COIL/HOLDING. Register words are little-endian. */
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pcan_modbus_result_t pcan_modbus_server_handle(pcan_modbus_server_t *server,
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const pcan_frame_t *request,
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pcan_frame_t *response);
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#ifdef __cplusplus
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}
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#endif
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#endif /* PCAN_MODBUS_SERVER_H */
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