1305 lines
35 KiB
C
1305 lines
35 KiB
C
/*
|
|
nanoMODBUS - A compact MODBUS RTU/TCP C library for microcontrollers
|
|
|
|
MIT License
|
|
|
|
Copyright (c) 2022 Valerio De Benedetto (@debevv)
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files (the "Software"), to deal
|
|
in the Software without restriction, including without limitation the rights
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included in all
|
|
copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
SOFTWARE.
|
|
*/
|
|
|
|
#include "nanomodbus.h"
|
|
#include <stdbool.h>
|
|
#include <string.h>
|
|
|
|
|
|
#ifdef NMBS_DEBUG
|
|
#include <stdio.h>
|
|
#define NMBS_DEBUG_PRINT(...) printf(__VA_ARGS__)
|
|
#else
|
|
#define NMBS_DEBUG_PRINT(...) (void) (0)
|
|
#endif
|
|
|
|
|
|
static uint8_t get_1(nmbs_t* nmbs) {
|
|
uint8_t result = nmbs->msg.buf[nmbs->msg.buf_idx];
|
|
nmbs->msg.buf_idx++;
|
|
return result;
|
|
}
|
|
|
|
|
|
static void put_1(nmbs_t* nmbs, uint8_t data) {
|
|
nmbs->msg.buf[nmbs->msg.buf_idx] = data;
|
|
nmbs->msg.buf_idx++;
|
|
}
|
|
|
|
|
|
static void discard_1(nmbs_t* nmbs) {
|
|
nmbs->msg.buf_idx++;
|
|
}
|
|
|
|
|
|
static uint16_t get_2(nmbs_t* nmbs) {
|
|
uint16_t result =
|
|
((uint16_t) nmbs->msg.buf[nmbs->msg.buf_idx]) << 8 | (uint16_t) nmbs->msg.buf[nmbs->msg.buf_idx + 1];
|
|
nmbs->msg.buf_idx += 2;
|
|
return result;
|
|
}
|
|
|
|
|
|
static void put_2(nmbs_t* nmbs, uint16_t data) {
|
|
nmbs->msg.buf[nmbs->msg.buf_idx] = (uint8_t) ((data >> 8) & 0xFFU);
|
|
nmbs->msg.buf[nmbs->msg.buf_idx + 1] = (uint8_t) data;
|
|
nmbs->msg.buf_idx += 2;
|
|
}
|
|
|
|
|
|
static void msg_buf_reset(nmbs_t* nmbs) {
|
|
nmbs->msg.buf_idx = 0;
|
|
}
|
|
|
|
|
|
static void msg_state_reset(nmbs_t* nmbs) {
|
|
msg_buf_reset(nmbs);
|
|
nmbs->msg.unit_id = 0;
|
|
nmbs->msg.fc = 0;
|
|
nmbs->msg.transaction_id = 0;
|
|
nmbs->msg.broadcast = false;
|
|
nmbs->msg.ignored = 0;
|
|
}
|
|
|
|
|
|
#ifndef NMBS_CLIENT_DISABLED
|
|
static void msg_state_req(nmbs_t* nmbs, uint8_t fc) {
|
|
if (nmbs->current_tid == UINT16_MAX)
|
|
nmbs->current_tid = 1;
|
|
else
|
|
nmbs->current_tid++;
|
|
|
|
msg_state_reset(nmbs);
|
|
nmbs->msg.unit_id = nmbs->dest_address_rtu;
|
|
nmbs->msg.fc = fc;
|
|
nmbs->msg.transaction_id = nmbs->current_tid;
|
|
if (nmbs->msg.unit_id == 0 && nmbs->platform.transport == NMBS_TRANSPORT_RTU)
|
|
nmbs->msg.broadcast = true;
|
|
}
|
|
#endif
|
|
|
|
|
|
int nmbs_create(nmbs_t* nmbs, const nmbs_platform_conf* platform_conf) {
|
|
if (!nmbs)
|
|
return NMBS_ERROR_INVALID_ARGUMENT;
|
|
|
|
memset(nmbs, 0, sizeof(nmbs_t));
|
|
|
|
nmbs->byte_timeout_ms = -1;
|
|
nmbs->read_timeout_ms = -1;
|
|
|
|
if (!platform_conf)
|
|
return NMBS_ERROR_INVALID_ARGUMENT;
|
|
|
|
if (platform_conf->transport != NMBS_TRANSPORT_RTU && platform_conf->transport != NMBS_TRANSPORT_TCP)
|
|
return NMBS_ERROR_INVALID_ARGUMENT;
|
|
|
|
if (!platform_conf->read || !platform_conf->write)
|
|
return NMBS_ERROR_INVALID_ARGUMENT;
|
|
|
|
nmbs->platform = *platform_conf;
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
|
|
|
|
void nmbs_set_read_timeout(nmbs_t* nmbs, int32_t timeout_ms) {
|
|
nmbs->read_timeout_ms = timeout_ms;
|
|
}
|
|
|
|
|
|
void nmbs_set_byte_timeout(nmbs_t* nmbs, int32_t timeout_ms) {
|
|
nmbs->byte_timeout_ms = timeout_ms;
|
|
}
|
|
|
|
|
|
void nmbs_set_destination_rtu_address(nmbs_t* nmbs, uint8_t address) {
|
|
nmbs->dest_address_rtu = address;
|
|
}
|
|
|
|
|
|
void nmbs_set_platform_arg(nmbs_t* nmbs, void* arg) {
|
|
nmbs->platform.arg = arg;
|
|
}
|
|
|
|
|
|
uint16_t nmbs_crc_calc(const uint8_t* data, uint32_t length) {
|
|
uint16_t crc = 0xFFFF;
|
|
for (uint32_t i = 0; i < length; i++) {
|
|
crc ^= (uint16_t) data[i];
|
|
for (int j = 8; j != 0; j--) {
|
|
if ((crc & 0x0001) != 0) {
|
|
crc >>= 1;
|
|
crc ^= 0xA001;
|
|
}
|
|
else
|
|
crc >>= 1;
|
|
}
|
|
}
|
|
|
|
return (uint16_t) (crc << 8) | (uint16_t) (crc >> 8);
|
|
}
|
|
|
|
|
|
static nmbs_error recv(nmbs_t* nmbs, uint16_t count) {
|
|
int32_t ret =
|
|
nmbs->platform.read(nmbs->msg.buf + nmbs->msg.buf_idx, count, nmbs->byte_timeout_ms, nmbs->platform.arg);
|
|
|
|
if (ret == count)
|
|
return NMBS_ERROR_NONE;
|
|
|
|
if (ret < count) {
|
|
if (ret < 0)
|
|
return NMBS_ERROR_TRANSPORT;
|
|
|
|
return NMBS_ERROR_TIMEOUT;
|
|
}
|
|
|
|
return NMBS_ERROR_TRANSPORT;
|
|
}
|
|
|
|
|
|
static nmbs_error send(nmbs_t* nmbs, uint16_t count) {
|
|
int32_t ret = nmbs->platform.write(nmbs->msg.buf, count, nmbs->byte_timeout_ms, nmbs->platform.arg);
|
|
|
|
if (ret == count)
|
|
return NMBS_ERROR_NONE;
|
|
|
|
if (ret < count) {
|
|
if (ret < 0)
|
|
return NMBS_ERROR_TRANSPORT;
|
|
|
|
return NMBS_ERROR_TIMEOUT;
|
|
}
|
|
|
|
return NMBS_ERROR_TRANSPORT;
|
|
}
|
|
|
|
|
|
static nmbs_error recv_msg_footer(nmbs_t* nmbs) {
|
|
NMBS_DEBUG_PRINT("\n");
|
|
|
|
if (nmbs->platform.transport == NMBS_TRANSPORT_RTU) {
|
|
uint16_t crc = nmbs_crc_calc(nmbs->msg.buf, nmbs->msg.buf_idx);
|
|
|
|
nmbs_error err = recv(nmbs, 2);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
uint16_t recv_crc = get_2(nmbs);
|
|
|
|
if (recv_crc != crc)
|
|
return NMBS_ERROR_CRC;
|
|
}
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
|
|
|
|
static nmbs_error recv_msg_header(nmbs_t* nmbs, bool* first_byte_received) {
|
|
// We wait for the read timeout here, just for the first message byte
|
|
int32_t old_byte_timeout = nmbs->byte_timeout_ms;
|
|
nmbs->byte_timeout_ms = nmbs->read_timeout_ms;
|
|
|
|
msg_state_reset(nmbs);
|
|
|
|
*first_byte_received = false;
|
|
|
|
if (nmbs->platform.transport == NMBS_TRANSPORT_RTU) {
|
|
nmbs_error err = recv(nmbs, 1);
|
|
|
|
nmbs->byte_timeout_ms = old_byte_timeout;
|
|
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
*first_byte_received = true;
|
|
|
|
nmbs->msg.unit_id = get_1(nmbs);
|
|
|
|
err = recv(nmbs, 1);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
nmbs->msg.fc = get_1(nmbs);
|
|
}
|
|
else if (nmbs->platform.transport == NMBS_TRANSPORT_TCP) {
|
|
nmbs_error err = recv(nmbs, 1);
|
|
|
|
nmbs->byte_timeout_ms = old_byte_timeout;
|
|
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
*first_byte_received = true;
|
|
|
|
// Advance buf_idx
|
|
discard_1(nmbs);
|
|
|
|
err = recv(nmbs, 7);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
// Starting over
|
|
msg_buf_reset(nmbs);
|
|
|
|
nmbs->msg.transaction_id = get_2(nmbs);
|
|
uint16_t protocol_id = get_2(nmbs);
|
|
uint16_t length = get_2(nmbs); // We should actually check the length of the request against this value
|
|
nmbs->msg.unit_id = get_1(nmbs);
|
|
nmbs->msg.fc = get_1(nmbs);
|
|
|
|
if (protocol_id != 0)
|
|
return NMBS_ERROR_INVALID_TCP_MBAP;
|
|
|
|
if (length > 255)
|
|
return NMBS_ERROR_INVALID_TCP_MBAP;
|
|
}
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
|
|
|
|
static void put_msg_header(nmbs_t* nmbs, uint16_t data_length) {
|
|
msg_buf_reset(nmbs);
|
|
|
|
if (nmbs->platform.transport == NMBS_TRANSPORT_RTU) {
|
|
put_1(nmbs, nmbs->msg.unit_id);
|
|
}
|
|
else if (nmbs->platform.transport == NMBS_TRANSPORT_TCP) {
|
|
put_2(nmbs, nmbs->msg.transaction_id);
|
|
put_2(nmbs, 0);
|
|
put_2(nmbs, (uint16_t) (1 + 1 + data_length));
|
|
put_1(nmbs, nmbs->msg.unit_id);
|
|
}
|
|
|
|
put_1(nmbs, nmbs->msg.fc);
|
|
}
|
|
|
|
|
|
static nmbs_error send_msg(nmbs_t* nmbs) {
|
|
NMBS_DEBUG_PRINT("\n");
|
|
|
|
if (nmbs->platform.transport == NMBS_TRANSPORT_RTU) {
|
|
uint16_t crc = nmbs_crc_calc(nmbs->msg.buf, nmbs->msg.buf_idx);
|
|
put_2(nmbs, crc);
|
|
}
|
|
|
|
nmbs_error err = send(nmbs, nmbs->msg.buf_idx);
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
#ifndef NMBS_SERVER_DISABLED
|
|
static nmbs_error recv_req_header(nmbs_t* nmbs, bool* first_byte_received) {
|
|
nmbs_error err = recv_msg_header(nmbs, first_byte_received);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (nmbs->platform.transport == NMBS_TRANSPORT_RTU) {
|
|
// Check if request is for us
|
|
if (nmbs->msg.unit_id == NMBS_BROADCAST_ADDRESS)
|
|
nmbs->msg.broadcast = true;
|
|
else if (nmbs->msg.unit_id != nmbs->address_rtu)
|
|
nmbs->msg.ignored = true;
|
|
else
|
|
nmbs->msg.ignored = false;
|
|
}
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
|
|
|
|
static void put_res_header(nmbs_t* nmbs, uint16_t data_length) {
|
|
put_msg_header(nmbs, data_length);
|
|
NMBS_DEBUG_PRINT("NMBS res -> fc %d\t", nmbs->msg.fc);
|
|
}
|
|
|
|
|
|
static nmbs_error send_exception_msg(nmbs_t* nmbs, uint8_t exception) {
|
|
nmbs->msg.fc += 0x80;
|
|
put_msg_header(nmbs, 1);
|
|
put_1(nmbs, exception);
|
|
|
|
NMBS_DEBUG_PRINT("NMBS res -> exception %d\n", exception);
|
|
|
|
return send_msg(nmbs);
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifndef NMBS_CLIENT_DISABLED
|
|
static nmbs_error recv_res_header(nmbs_t* nmbs) {
|
|
uint16_t req_transaction_id = nmbs->msg.transaction_id;
|
|
uint8_t req_unit_id = nmbs->msg.unit_id;
|
|
uint8_t req_fc = nmbs->msg.fc;
|
|
|
|
bool first_byte_received;
|
|
nmbs_error err = recv_msg_header(nmbs, &first_byte_received);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (nmbs->platform.transport == NMBS_TRANSPORT_TCP) {
|
|
if (nmbs->msg.transaction_id != req_transaction_id)
|
|
return NMBS_ERROR_INVALID_TCP_MBAP;
|
|
}
|
|
|
|
if (nmbs->msg.unit_id != req_unit_id)
|
|
return NMBS_ERROR_INVALID_UNIT_ID;
|
|
|
|
if (nmbs->msg.fc != req_fc) {
|
|
if (nmbs->msg.fc - 0x80 == req_fc) {
|
|
err = recv(nmbs, 1);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
uint8_t exception = get_1(nmbs);
|
|
err = recv_msg_footer(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (exception < 1 || exception > 4)
|
|
return NMBS_ERROR_INVALID_RESPONSE;
|
|
|
|
NMBS_DEBUG_PRINT("exception %d\n", exception);
|
|
return exception;
|
|
}
|
|
|
|
return NMBS_ERROR_INVALID_RESPONSE;
|
|
}
|
|
|
|
NMBS_DEBUG_PRINT("NMBS res <- fc %d\t", nmbs->msg.fc);
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
|
|
|
|
static void put_req_header(nmbs_t* nmbs, uint16_t data_length) {
|
|
put_msg_header(nmbs, data_length);
|
|
NMBS_DEBUG_PRINT("NMBS req -> fc %d\t", nmbs->msg.fc);
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifndef NMBS_SERVER_DISABLED
|
|
#if !defined(NMBS_SERVER_READ_COILS_DISABLED) || !defined(NMBS_SERVER_READ_DISCRETE_INPUTS_DISABLED)
|
|
static nmbs_error handle_read_discrete(nmbs_t* nmbs, nmbs_error (*callback)(uint16_t, uint16_t, nmbs_bitfield, void*)) {
|
|
nmbs_error err = recv(nmbs, 4);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
uint16_t address = get_2(nmbs);
|
|
uint16_t quantity = get_2(nmbs);
|
|
|
|
NMBS_DEBUG_PRINT("a %d\tq %d", address, quantity);
|
|
|
|
err = recv_msg_footer(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (!nmbs->msg.ignored) {
|
|
if (quantity < 1 || quantity > 2000)
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_DATA_VALUE);
|
|
|
|
if ((uint32_t) address + (uint32_t) quantity > ((uint32_t) 0xFFFF) + 1)
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_DATA_ADDRESS);
|
|
|
|
if (callback) {
|
|
nmbs_bitfield bitfield = {0};
|
|
err = callback(address, quantity, bitfield, nmbs->platform.arg);
|
|
if (err != NMBS_ERROR_NONE) {
|
|
if (nmbs_error_is_exception(err))
|
|
return send_exception_msg(nmbs, err);
|
|
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_SERVER_DEVICE_FAILURE);
|
|
}
|
|
|
|
if (!nmbs->msg.broadcast) {
|
|
uint8_t discrete_bytes = (quantity / 8) + 1;
|
|
put_res_header(nmbs, 1 + discrete_bytes);
|
|
|
|
put_1(nmbs, discrete_bytes);
|
|
|
|
NMBS_DEBUG_PRINT("b %d\t", discrete_bytes);
|
|
|
|
NMBS_DEBUG_PRINT("coils ");
|
|
for (int i = 0; i < discrete_bytes; i++) {
|
|
put_1(nmbs, bitfield[i]);
|
|
NMBS_DEBUG_PRINT("%d", bitfield[i]);
|
|
}
|
|
|
|
err = send_msg(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
}
|
|
}
|
|
else {
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_FUNCTION);
|
|
}
|
|
}
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
#endif
|
|
|
|
|
|
#if !defined(NMBS_SERVER_READ_HOLDING_REGISTERS_DISABLED) || !defined(NMBS_SERVER_READ_INPUT_REGISTERS_DISABLED)
|
|
static nmbs_error handle_read_registers(nmbs_t* nmbs, nmbs_error (*callback)(uint16_t, uint16_t, uint16_t*, void*)) {
|
|
nmbs_error err = recv(nmbs, 4);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
uint16_t address = get_2(nmbs);
|
|
uint16_t quantity = get_2(nmbs);
|
|
|
|
NMBS_DEBUG_PRINT("a %d\tq %d", address, quantity);
|
|
|
|
err = recv_msg_footer(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (!nmbs->msg.ignored) {
|
|
if (quantity < 1 || quantity > 125)
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_DATA_VALUE);
|
|
|
|
if ((uint32_t) address + (uint32_t) quantity > ((uint32_t) 0xFFFF) + 1)
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_DATA_ADDRESS);
|
|
|
|
if (callback) {
|
|
uint16_t regs[125] = {0};
|
|
err = callback(address, quantity, regs, nmbs->platform.arg);
|
|
if (err != NMBS_ERROR_NONE) {
|
|
if (nmbs_error_is_exception(err))
|
|
return send_exception_msg(nmbs, err);
|
|
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_SERVER_DEVICE_FAILURE);
|
|
}
|
|
|
|
if (!nmbs->msg.broadcast) {
|
|
uint8_t regs_bytes = quantity * 2;
|
|
put_res_header(nmbs, 1 + regs_bytes);
|
|
|
|
put_1(nmbs, regs_bytes);
|
|
|
|
NMBS_DEBUG_PRINT("b %d\t", regs_bytes);
|
|
|
|
NMBS_DEBUG_PRINT("regs ");
|
|
for (int i = 0; i < quantity; i++) {
|
|
put_2(nmbs, regs[i]);
|
|
NMBS_DEBUG_PRINT("%d", regs[i]);
|
|
}
|
|
|
|
err = send_msg(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
}
|
|
}
|
|
else {
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_FUNCTION);
|
|
}
|
|
}
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifndef NMBS_SERVER_READ_COILS_DISABLED
|
|
static nmbs_error handle_read_coils(nmbs_t* nmbs) {
|
|
return handle_read_discrete(nmbs, nmbs->callbacks.read_coils);
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifndef NMBS_SERVER_READ_DISCRETE_INPUTS_DISABLED
|
|
static nmbs_error handle_read_discrete_inputs(nmbs_t* nmbs) {
|
|
return handle_read_discrete(nmbs, nmbs->callbacks.read_discrete_inputs);
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifndef NMBS_SERVER_READ_HOLDING_REGISTERS_DISABLED
|
|
static nmbs_error handle_read_holding_registers(nmbs_t* nmbs) {
|
|
return handle_read_registers(nmbs, nmbs->callbacks.read_holding_registers);
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifndef NMBS_SERVER_READ_INPUT_REGISTERS_DISABLED
|
|
static nmbs_error handle_read_input_registers(nmbs_t* nmbs) {
|
|
return handle_read_registers(nmbs, nmbs->callbacks.read_input_registers);
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifndef NMBS_SERVER_WRITE_SINGLE_COIL_DISABLED
|
|
static nmbs_error handle_write_single_coil(nmbs_t* nmbs) {
|
|
nmbs_error err = recv(nmbs, 4);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
uint16_t address = get_2(nmbs);
|
|
uint16_t value = get_2(nmbs);
|
|
|
|
NMBS_DEBUG_PRINT("a %d\tvalue %d", address, value);
|
|
|
|
err = recv_msg_footer(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (!nmbs->msg.ignored) {
|
|
if (nmbs->callbacks.write_single_coil) {
|
|
if (value != 0 && value != 0xFF00)
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_DATA_VALUE);
|
|
|
|
err = nmbs->callbacks.write_single_coil(address, value == 0 ? false : true, nmbs->platform.arg);
|
|
if (err != NMBS_ERROR_NONE) {
|
|
if (nmbs_error_is_exception(err))
|
|
return send_exception_msg(nmbs, err);
|
|
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_SERVER_DEVICE_FAILURE);
|
|
}
|
|
|
|
if (!nmbs->msg.broadcast) {
|
|
put_res_header(nmbs, 4);
|
|
|
|
put_2(nmbs, address);
|
|
put_2(nmbs, value);
|
|
NMBS_DEBUG_PRINT("a %d\tvalue %d", address, value);
|
|
|
|
err = send_msg(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
}
|
|
}
|
|
else {
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_FUNCTION);
|
|
}
|
|
}
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifndef NMBS_SERVER_WRITE_SINGLE_REGISTER_DISABLED
|
|
static nmbs_error handle_write_single_register(nmbs_t* nmbs) {
|
|
nmbs_error err = recv(nmbs, 4);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
uint16_t address = get_2(nmbs);
|
|
uint16_t value = get_2(nmbs);
|
|
|
|
NMBS_DEBUG_PRINT("a %d\tvalue %d", address, value);
|
|
|
|
err = recv_msg_footer(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (!nmbs->msg.ignored) {
|
|
if (nmbs->callbacks.write_single_register) {
|
|
err = nmbs->callbacks.write_single_register(address, value, nmbs->platform.arg);
|
|
if (err != NMBS_ERROR_NONE) {
|
|
if (nmbs_error_is_exception(err))
|
|
return send_exception_msg(nmbs, err);
|
|
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_SERVER_DEVICE_FAILURE);
|
|
}
|
|
|
|
if (!nmbs->msg.broadcast) {
|
|
put_res_header(nmbs, 4);
|
|
|
|
put_2(nmbs, address);
|
|
put_2(nmbs, value);
|
|
NMBS_DEBUG_PRINT("a %d\tvalue %d", address, value);
|
|
|
|
err = send_msg(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
}
|
|
}
|
|
else {
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_FUNCTION);
|
|
}
|
|
}
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifndef NMBS_SERVER_WRITE_MULTIPLE_COILS_DISABLED
|
|
static nmbs_error handle_write_multiple_coils(nmbs_t* nmbs) {
|
|
nmbs_error err = recv(nmbs, 5);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
uint16_t address = get_2(nmbs);
|
|
uint16_t quantity = get_2(nmbs);
|
|
uint8_t coils_bytes = get_1(nmbs);
|
|
|
|
NMBS_DEBUG_PRINT("a %d\tq %d\tb %d\tcoils ", address, quantity, coils_bytes);
|
|
|
|
err = recv(nmbs, coils_bytes);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
nmbs_bitfield coils;
|
|
for (int i = 0; i < coils_bytes; i++) {
|
|
coils[i] = get_1(nmbs);
|
|
NMBS_DEBUG_PRINT("%d ", coils[i]);
|
|
}
|
|
|
|
err = recv_msg_footer(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (!nmbs->msg.ignored) {
|
|
if (quantity < 1 || quantity > 0x07B0)
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_DATA_VALUE);
|
|
|
|
if ((uint32_t) address + (uint32_t) quantity > ((uint32_t) 0xFFFF) + 1)
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_DATA_ADDRESS);
|
|
|
|
if (coils_bytes == 0)
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_DATA_VALUE);
|
|
|
|
if ((quantity / 8) + 1 != coils_bytes)
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_DATA_VALUE);
|
|
|
|
if (nmbs->callbacks.write_multiple_coils) {
|
|
err = nmbs->callbacks.write_multiple_coils(address, quantity, coils, nmbs->platform.arg);
|
|
if (err != NMBS_ERROR_NONE) {
|
|
if (nmbs_error_is_exception(err))
|
|
return send_exception_msg(nmbs, err);
|
|
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_SERVER_DEVICE_FAILURE);
|
|
}
|
|
|
|
if (!nmbs->msg.broadcast) {
|
|
put_res_header(nmbs, 4);
|
|
|
|
put_2(nmbs, address);
|
|
put_2(nmbs, quantity);
|
|
NMBS_DEBUG_PRINT("a %d\tq %d", address, quantity);
|
|
|
|
err = send_msg(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
}
|
|
}
|
|
else {
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_FUNCTION);
|
|
}
|
|
}
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifndef NMBS_SERVER_WRITE_MULTIPLE_REGISTERS_DISABLED
|
|
static nmbs_error handle_write_multiple_registers(nmbs_t* nmbs) {
|
|
nmbs_error err = recv(nmbs, 5);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
uint16_t address = get_2(nmbs);
|
|
uint16_t quantity = get_2(nmbs);
|
|
uint8_t registers_bytes = get_1(nmbs);
|
|
|
|
NMBS_DEBUG_PRINT("a %d\tq %d\tb %d\tregs ", address, quantity, registers_bytes);
|
|
|
|
err = recv(nmbs, registers_bytes);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
uint16_t registers[0x007B];
|
|
for (int i = 0; i < registers_bytes / 2; i++) {
|
|
registers[i] = get_2(nmbs);
|
|
NMBS_DEBUG_PRINT("%d ", registers[i]);
|
|
}
|
|
|
|
err = recv_msg_footer(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (!nmbs->msg.ignored) {
|
|
if (quantity < 1 || quantity > 0x007B)
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_DATA_VALUE);
|
|
|
|
if ((uint32_t) address + (uint32_t) quantity > ((uint32_t) 0xFFFF) + 1)
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_DATA_ADDRESS);
|
|
|
|
if (registers_bytes == 0)
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_DATA_VALUE);
|
|
|
|
if (registers_bytes != quantity * 2)
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_DATA_VALUE);
|
|
|
|
if (nmbs->callbacks.write_multiple_registers) {
|
|
err = nmbs->callbacks.write_multiple_registers(address, quantity, registers, nmbs->platform.arg);
|
|
if (err != NMBS_ERROR_NONE) {
|
|
if (nmbs_error_is_exception(err))
|
|
return send_exception_msg(nmbs, err);
|
|
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_SERVER_DEVICE_FAILURE);
|
|
}
|
|
|
|
if (!nmbs->msg.broadcast) {
|
|
put_res_header(nmbs, 4);
|
|
|
|
put_2(nmbs, address);
|
|
put_2(nmbs, quantity);
|
|
NMBS_DEBUG_PRINT("a %d\tq %d", address, quantity);
|
|
|
|
err = send_msg(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
}
|
|
}
|
|
else {
|
|
return send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_FUNCTION);
|
|
}
|
|
}
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
#endif
|
|
|
|
|
|
static nmbs_error handle_req_fc(nmbs_t* nmbs) {
|
|
NMBS_DEBUG_PRINT("fc %d\t", nmbs->msg.fc);
|
|
|
|
nmbs_error err;
|
|
switch (nmbs->msg.fc) {
|
|
#ifndef NMBS_SERVER_WRITE_MULTIPLE_COILS_DISABLED
|
|
case 1:
|
|
err = handle_read_coils(nmbs);
|
|
break;
|
|
#endif
|
|
|
|
#ifndef NMBS_SERVER_READ_DISCRETE_INPUTS_DISABLED
|
|
case 2:
|
|
err = handle_read_discrete_inputs(nmbs);
|
|
break;
|
|
#endif
|
|
|
|
#ifndef NMBS_SERVER_READ_HOLDING_REGISTERS_DISABLED
|
|
case 3:
|
|
err = handle_read_holding_registers(nmbs);
|
|
break;
|
|
#endif
|
|
|
|
#ifndef NMBS_SERVER_READ_INPUT_REGISTERS_DISABLED
|
|
case 4:
|
|
err = handle_read_input_registers(nmbs);
|
|
break;
|
|
#endif
|
|
|
|
#ifndef NMBS_SERVER_WRITE_SINGLE_COIL_DISABLED
|
|
case 5:
|
|
err = handle_write_single_coil(nmbs);
|
|
break;
|
|
#endif
|
|
|
|
#ifndef NMBS_SERVER_WRITE_SINGLE_REGISTER_DISABLED
|
|
case 6:
|
|
err = handle_write_single_register(nmbs);
|
|
break;
|
|
#endif
|
|
|
|
#ifndef NMBS_SERVER_WRITE_MULTIPLE_COILS_DISABLED
|
|
case 15:
|
|
err = handle_write_multiple_coils(nmbs);
|
|
break;
|
|
#endif
|
|
|
|
#ifndef NMBS_SERVER_WRITE_MULTIPLE_REGISTERS_DISABLED
|
|
case 16:
|
|
err = handle_write_multiple_registers(nmbs);
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
err = NMBS_EXCEPTION_ILLEGAL_FUNCTION;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
nmbs_error nmbs_server_create(nmbs_t* nmbs, uint8_t address_rtu, const nmbs_platform_conf* platform_conf,
|
|
const nmbs_callbacks* callbacks) {
|
|
if (platform_conf->transport == NMBS_TRANSPORT_RTU && address_rtu == 0)
|
|
return NMBS_ERROR_INVALID_ARGUMENT;
|
|
|
|
nmbs_error ret = nmbs_create(nmbs, platform_conf);
|
|
if (ret != NMBS_ERROR_NONE)
|
|
return ret;
|
|
|
|
nmbs->address_rtu = address_rtu;
|
|
nmbs->callbacks = *callbacks;
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
|
|
|
|
nmbs_error nmbs_server_poll(nmbs_t* nmbs) {
|
|
msg_state_reset(nmbs);
|
|
|
|
bool first_byte_received = false;
|
|
nmbs_error err = recv_req_header(nmbs, &first_byte_received);
|
|
if (err != NMBS_ERROR_NONE) {
|
|
if (!first_byte_received && err == NMBS_ERROR_TIMEOUT)
|
|
return NMBS_ERROR_NONE;
|
|
|
|
return err;
|
|
}
|
|
|
|
#ifdef NMBS_DEBUG
|
|
printf("NMBS req <- ");
|
|
if (nmbs->platform.transport == NMBS_TRANSPORT_RTU) {
|
|
if (nmbs->msg.broadcast)
|
|
printf("broadcast\t");
|
|
|
|
printf("client_id %d\t", nmbs->msg.unit_id);
|
|
}
|
|
#endif
|
|
|
|
err = handle_req_fc(nmbs);
|
|
if (err != NMBS_ERROR_NONE) {
|
|
if (!nmbs_error_is_exception(err))
|
|
return err;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifndef NMBS_CLIENT_DISABLED
|
|
nmbs_error nmbs_client_create(nmbs_t* nmbs, const nmbs_platform_conf* platform_conf) {
|
|
return nmbs_create(nmbs, platform_conf);
|
|
}
|
|
|
|
|
|
static nmbs_error read_discrete(nmbs_t* nmbs, uint8_t fc, uint16_t address, uint16_t quantity, nmbs_bitfield values) {
|
|
if (quantity < 1 || quantity > 2000)
|
|
return NMBS_ERROR_INVALID_ARGUMENT;
|
|
|
|
if ((uint32_t) address + (uint32_t) quantity > ((uint32_t) 0xFFFF) + 1)
|
|
return NMBS_ERROR_INVALID_ARGUMENT;
|
|
|
|
msg_state_req(nmbs, fc);
|
|
put_req_header(nmbs, 4);
|
|
|
|
put_2(nmbs, address);
|
|
put_2(nmbs, quantity);
|
|
|
|
NMBS_DEBUG_PRINT("a %d\tq %d", address, quantity);
|
|
|
|
nmbs_error err = send_msg(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
err = recv_res_header(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
err = recv(nmbs, 1);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
uint8_t coils_bytes = get_1(nmbs);
|
|
NMBS_DEBUG_PRINT("b %d\t", coils_bytes);
|
|
|
|
err = recv(nmbs, coils_bytes);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
NMBS_DEBUG_PRINT("coils ");
|
|
for (int i = 0; i < coils_bytes; i++) {
|
|
values[i] = get_1(nmbs);
|
|
NMBS_DEBUG_PRINT("%d", values[i]);
|
|
}
|
|
|
|
err = recv_msg_footer(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
|
|
|
|
nmbs_error nmbs_read_coils(nmbs_t* nmbs, uint16_t address, uint16_t quantity, nmbs_bitfield coils_out) {
|
|
return read_discrete(nmbs, 1, address, quantity, coils_out);
|
|
}
|
|
|
|
|
|
nmbs_error nmbs_read_discrete_inputs(nmbs_t* nmbs, uint16_t address, uint16_t quantity, nmbs_bitfield inputs_out) {
|
|
return read_discrete(nmbs, 2, address, quantity, inputs_out);
|
|
}
|
|
|
|
|
|
static nmbs_error read_registers(nmbs_t* nmbs, uint8_t fc, uint16_t address, uint16_t quantity, uint16_t* registers) {
|
|
if (quantity < 1 || quantity > 125)
|
|
return NMBS_ERROR_INVALID_ARGUMENT;
|
|
|
|
if ((uint32_t) address + (uint32_t) quantity > ((uint32_t) 0xFFFF) + 1)
|
|
return NMBS_ERROR_INVALID_ARGUMENT;
|
|
|
|
msg_state_req(nmbs, fc);
|
|
put_req_header(nmbs, 4);
|
|
|
|
put_2(nmbs, address);
|
|
put_2(nmbs, quantity);
|
|
|
|
NMBS_DEBUG_PRINT("a %d\tq %d ", address, quantity);
|
|
|
|
nmbs_error err = send_msg(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
err = recv_res_header(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
err = recv(nmbs, 1);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
uint8_t registers_bytes = get_1(nmbs);
|
|
NMBS_DEBUG_PRINT("b %d\t", registers_bytes);
|
|
|
|
err = recv(nmbs, registers_bytes);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
NMBS_DEBUG_PRINT("regs ");
|
|
for (int i = 0; i < registers_bytes / 2; i++) {
|
|
registers[i] = get_2(nmbs);
|
|
NMBS_DEBUG_PRINT("%d", registers[i]);
|
|
}
|
|
|
|
err = recv_msg_footer(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (registers_bytes != quantity * 2)
|
|
return NMBS_ERROR_INVALID_RESPONSE;
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
|
|
|
|
nmbs_error nmbs_read_holding_registers(nmbs_t* nmbs, uint16_t address, uint16_t quantity, uint16_t* registers_out) {
|
|
return read_registers(nmbs, 3, address, quantity, registers_out);
|
|
}
|
|
|
|
|
|
nmbs_error nmbs_read_input_registers(nmbs_t* nmbs, uint16_t address, uint16_t quantity, uint16_t* registers_out) {
|
|
return read_registers(nmbs, 4, address, quantity, registers_out);
|
|
}
|
|
|
|
|
|
nmbs_error nmbs_write_single_coil(nmbs_t* nmbs, uint16_t address, bool value) {
|
|
msg_state_req(nmbs, 5);
|
|
put_req_header(nmbs, 4);
|
|
|
|
uint16_t value_req = value ? 0xFF00 : 0;
|
|
|
|
put_2(nmbs, address);
|
|
put_2(nmbs, value_req);
|
|
|
|
NMBS_DEBUG_PRINT("a %d\tvalue %d ", address, value_req);
|
|
|
|
nmbs_error err = send_msg(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (!nmbs->msg.broadcast) {
|
|
err = recv_res_header(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
err = recv(nmbs, 4);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
uint16_t address_res = get_2(nmbs);
|
|
uint16_t value_res = get_2(nmbs);
|
|
|
|
NMBS_DEBUG_PRINT("a %d\tvalue %d", address, value_res);
|
|
|
|
err = recv_msg_footer(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (address_res != address)
|
|
return NMBS_ERROR_INVALID_RESPONSE;
|
|
|
|
if (value_res != value_req)
|
|
return NMBS_ERROR_INVALID_RESPONSE;
|
|
}
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
|
|
|
|
nmbs_error nmbs_write_single_register(nmbs_t* nmbs, uint16_t address, uint16_t value) {
|
|
msg_state_req(nmbs, 6);
|
|
put_req_header(nmbs, 4);
|
|
|
|
put_2(nmbs, address);
|
|
put_2(nmbs, value);
|
|
|
|
NMBS_DEBUG_PRINT("a %d\tvalue %d", address, value);
|
|
|
|
nmbs_error err = send_msg(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (!nmbs->msg.broadcast) {
|
|
err = recv_res_header(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
err = recv(nmbs, 4);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
uint16_t address_res = get_2(nmbs);
|
|
uint16_t value_res = get_2(nmbs);
|
|
NMBS_DEBUG_PRINT("a %d\tvalue %d ", address, value_res);
|
|
|
|
err = recv_msg_footer(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (address_res != address)
|
|
return NMBS_ERROR_INVALID_RESPONSE;
|
|
|
|
if (value_res != value)
|
|
return NMBS_ERROR_INVALID_RESPONSE;
|
|
}
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
|
|
|
|
nmbs_error nmbs_write_multiple_coils(nmbs_t* nmbs, uint16_t address, uint16_t quantity, const nmbs_bitfield coils) {
|
|
if (quantity < 1 || quantity > 0x07B0)
|
|
return NMBS_ERROR_INVALID_ARGUMENT;
|
|
|
|
if ((uint32_t) address + (uint32_t) quantity > ((uint32_t) 0xFFFF) + 1)
|
|
return NMBS_ERROR_INVALID_ARGUMENT;
|
|
|
|
uint8_t coils_bytes = (quantity / 8) + 1;
|
|
|
|
msg_state_req(nmbs, 15);
|
|
put_req_header(nmbs, 5 + coils_bytes);
|
|
|
|
put_2(nmbs, address);
|
|
put_2(nmbs, quantity);
|
|
put_1(nmbs, coils_bytes);
|
|
NMBS_DEBUG_PRINT("a %d\tq %d\tb %d\t", address, quantity, coils_bytes);
|
|
|
|
NMBS_DEBUG_PRINT("coils ");
|
|
for (int i = 0; i < coils_bytes; i++) {
|
|
put_1(nmbs, coils[i]);
|
|
NMBS_DEBUG_PRINT("%d ", coils[i]);
|
|
}
|
|
|
|
nmbs_error err = send_msg(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (!nmbs->msg.broadcast) {
|
|
err = recv_res_header(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
err = recv(nmbs, 4);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
uint16_t address_res = get_2(nmbs);
|
|
uint16_t quantity_res = get_2(nmbs);
|
|
NMBS_DEBUG_PRINT("a %d\tq %d", address_res, quantity_res);
|
|
|
|
err = recv_msg_footer(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (address_res != address)
|
|
return NMBS_ERROR_INVALID_RESPONSE;
|
|
|
|
if (quantity_res != quantity)
|
|
return NMBS_ERROR_INVALID_RESPONSE;
|
|
}
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
|
|
|
|
nmbs_error nmbs_write_multiple_registers(nmbs_t* nmbs, uint16_t address, uint16_t quantity, const uint16_t* registers) {
|
|
if (quantity < 1 || quantity > 0x007B)
|
|
return NMBS_ERROR_INVALID_ARGUMENT;
|
|
|
|
if ((uint32_t) address + (uint32_t) quantity > ((uint32_t) 0xFFFF) + 1)
|
|
return NMBS_ERROR_INVALID_ARGUMENT;
|
|
|
|
uint8_t registers_bytes = quantity * 2;
|
|
|
|
msg_state_req(nmbs, 16);
|
|
put_req_header(nmbs, 5 + registers_bytes);
|
|
|
|
put_2(nmbs, address);
|
|
put_2(nmbs, quantity);
|
|
put_1(nmbs, registers_bytes);
|
|
NMBS_DEBUG_PRINT("a %d\tq %d\tb %d\t", address, quantity, registers_bytes);
|
|
|
|
NMBS_DEBUG_PRINT("regs ");
|
|
for (int i = 0; i < quantity; i++) {
|
|
put_2(nmbs, registers[i]);
|
|
NMBS_DEBUG_PRINT("%d ", registers[i]);
|
|
}
|
|
|
|
nmbs_error err = send_msg(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (!nmbs->msg.broadcast) {
|
|
err = recv_res_header(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
err = recv(nmbs, 4);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
uint16_t address_res = get_2(nmbs);
|
|
uint16_t quantity_res = get_2(nmbs);
|
|
NMBS_DEBUG_PRINT("a %d\tq %d", address_res, quantity_res);
|
|
|
|
err = recv_msg_footer(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
if (address_res != address)
|
|
return NMBS_ERROR_INVALID_RESPONSE;
|
|
|
|
if (quantity_res != quantity)
|
|
return NMBS_ERROR_INVALID_RESPONSE;
|
|
}
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
|
|
|
|
nmbs_error nmbs_send_raw_pdu(nmbs_t* nmbs, uint8_t fc, const uint8_t* data, uint16_t data_len) {
|
|
msg_state_req(nmbs, fc);
|
|
put_msg_header(nmbs, data_len);
|
|
|
|
NMBS_DEBUG_PRINT("raw ");
|
|
for (uint16_t i = 0; i < data_len; i++) {
|
|
put_1(nmbs, data[i]);
|
|
NMBS_DEBUG_PRINT("%d ", data[i]);
|
|
}
|
|
|
|
return send_msg(nmbs);
|
|
}
|
|
|
|
|
|
nmbs_error nmbs_receive_raw_pdu_response(nmbs_t* nmbs, uint8_t* data_out, uint16_t data_out_len) {
|
|
nmbs_error err = recv_res_header(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
err = recv(nmbs, data_out_len);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
for (uint16_t i = 0; i < data_out_len; i++) {
|
|
data_out[i] = get_1(nmbs);
|
|
}
|
|
|
|
err = recv_msg_footer(nmbs);
|
|
if (err != NMBS_ERROR_NONE)
|
|
return err;
|
|
|
|
return NMBS_ERROR_NONE;
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifndef NMBS_STRERROR_DISABLED
|
|
const char* nmbs_strerror(nmbs_error error) {
|
|
switch (error) {
|
|
case NMBS_ERROR_INVALID_UNIT_ID:
|
|
return "invalid unit ID received";
|
|
|
|
case NMBS_ERROR_INVALID_TCP_MBAP:
|
|
return "invalid TCP MBAP received";
|
|
|
|
case NMBS_ERROR_CRC:
|
|
return "invalid CRC received";
|
|
|
|
case NMBS_ERROR_TRANSPORT:
|
|
return "transport error";
|
|
|
|
case NMBS_ERROR_TIMEOUT:
|
|
return "timeout";
|
|
|
|
case NMBS_ERROR_INVALID_RESPONSE:
|
|
return "invalid response received";
|
|
|
|
case NMBS_ERROR_INVALID_ARGUMENT:
|
|
return "invalid argument provided";
|
|
|
|
case NMBS_ERROR_NONE:
|
|
return "no error";
|
|
|
|
case NMBS_EXCEPTION_ILLEGAL_FUNCTION:
|
|
return "modbus exception 1: illegal function";
|
|
|
|
case NMBS_EXCEPTION_ILLEGAL_DATA_ADDRESS:
|
|
return "modbus exception 2: illegal data address";
|
|
|
|
case NMBS_EXCEPTION_ILLEGAL_DATA_VALUE:
|
|
return "modbus exception 3: data value";
|
|
|
|
case NMBS_EXCEPTION_SERVER_DEVICE_FAILURE:
|
|
return "modbus exception 4: server device failure";
|
|
|
|
default:
|
|
return "unknown error";
|
|
}
|
|
}
|
|
#endif
|