mb_data_handlers_t Struct Reference

This structure contains pointers to data handlers. More...

#include <modbus.h>

Data Fields
uint16_t(*	InputRead )(uint16_t idx, uint16_t len, mb_pdu_t *resp_pdu)
	A pointer to a function that reads discrete inputs corresponding to the given index.
uint16_t(*	CoilRead )(uint16_t idx, uint16_t len, mb_pdu_t *resp_pdu)
	A pointer to a function that reads coils corresponding to the given index.
uint16_t(*	CoilWrite )(uint16_t idx, uint16_t len, uint8_t *val)
	A pointer to a function that writes a coil corresponding to the given address.
uint16_t(*	InRegRead )(uint16_t idx, uint16_t len, mb_pdu_t *resp_pdu)
	A pointer to a function that reads input registers corresponding to the given address.
uint16_t(*	HRegRead )(uint16_t idx, uint16_t len, mb_pdu_t *resp_pdu)
	A pointer to a function that reads a holding register corresponding to the given address.
uint16_t(*	HRegWrite )(uint16_t idx, uint16_t len, uint8_t *val)
	A pointer to a function that writes a holding register corresponding to the given address.

Detailed Description

This structure contains pointers to data handlers.

Field Documentation

CoilRead

uint16_t(* mb_data_handlers_t::CoilRead) (uint16_t idx, uint16_t len, mb_pdu_t *resp_pdu)

A pointer to a function that reads coils corresponding to the given index.

Parameters

[in]	idx	index of the first coil to read.
[in]	len	number of coils to read.
[out]	data	data that has been read.

Returns

0 if all was ok, a different value otherwise.

CoilWrite

uint16_t(* mb_data_handlers_t::CoilWrite) (uint16_t idx, uint16_t len, uint8_t *val)

A pointer to a function that writes a coil corresponding to the given address.

Parameters

[in]	idx	index of the first coil to write.
[in]	len	number of coils to write.
[in]	val	coil values to write.

Returns

0 if all was ok, a different value otherwise.

HRegRead

uint16_t(* mb_data_handlers_t::HRegRead) (uint16_t idx, uint16_t len, mb_pdu_t *resp_pdu)

A pointer to a function that reads a holding register corresponding to the given address.

Parameters

[in]	idx	index of the first holding register to read.
[out]	data	value that has been read.

Returns

0 if all was ok, a different value otherwise.

HRegWrite

uint16_t(* mb_data_handlers_t::HRegWrite) (uint16_t idx, uint16_t len, uint8_t *val)

A pointer to a function that writes a holding register corresponding to the given address.

Parameters

[in]	idx	index of the first holding register to write.
[in]	len	number of register values to write.
[in]	val	register values to write.

Returns

0 if all was ok, a different value otherwise.

InputRead

uint16_t(* mb_data_handlers_t::InputRead) (uint16_t idx, uint16_t len, mb_pdu_t *resp_pdu)

A pointer to a function that reads discrete inputs corresponding to the given index.

Parameters

[in]	idx	index of the first discrete input to read.
[in]	len	number of discrete inputs to read.
[out]	data	data that has been read.

Returns

0 if all was ok, a different value otherwise.

InRegRead

uint16_t(* mb_data_handlers_t::InRegRead) (uint16_t idx, uint16_t len, mb_pdu_t *resp_pdu)

A pointer to a function that reads input registers corresponding to the given address.

Parameters

[in]	idx	index of the first input register to read.
[in]	len	number of input registers to read.
[out]	data	data that has been read.

Returns

0 if all was ok, a different value otherwise.

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The documentation for this struct was generated from the following file:

• include/modbus/modbus_core/modbus.h