92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/*! \file prim.c
|
|
* modbus primitives */
|
|
/*
|
|
* Copyright (C) 2020 Pau Espin Pedrol <pespin@espeweb.net>
|
|
*
|
|
* All Rights Reserved
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include <unistd.h>
|
|
#include <inttypes.h>
|
|
|
|
#include <osmocom/core/msgb.h>
|
|
|
|
#include <osmocom/modbus/modbus_prim.h>
|
|
#include <osmocom/modbus/modbus.h>
|
|
|
|
#define MODBUS_SAP 0
|
|
|
|
static struct msgb *modbus_prim_msgb_alloc(const char* desc)
|
|
{
|
|
return msgb_alloc(sizeof(struct osmo_modbus_prim), desc);
|
|
}
|
|
|
|
const struct value_string osmo_modbus_prim_type_names[] = {
|
|
{ OSMO_MODBUS_PRIM_RESPONSE_TIMEOUT, "Response Timeout" },
|
|
{ OSMO_MODBUS_PRIM_N_MULT_HOLD_REG, "N Multiple Holding Registers" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
struct osmo_modbus_prim *osmo_modbus_makeprim_timeout_resp(uint16_t address)
|
|
{
|
|
struct msgb *msg = modbus_prim_msgb_alloc(__func__);
|
|
struct osmo_modbus_prim *prim;
|
|
|
|
prim = (struct osmo_modbus_prim *) msgb_put(msg, sizeof(*prim));
|
|
osmo_prim_init(&prim->oph, MODBUS_SAP,
|
|
OSMO_MODBUS_PRIM_RESPONSE_TIMEOUT,
|
|
PRIM_OP_INDICATION, msg);
|
|
prim->address = address;
|
|
return prim;
|
|
}
|
|
|
|
struct osmo_modbus_prim *osmo_modbus_makeprim_mult_hold_reg_req(uint16_t address, uint16_t first_reg, uint16_t num_reg)
|
|
{
|
|
struct msgb *msg = modbus_prim_msgb_alloc(__func__);
|
|
struct osmo_modbus_prim *prim;
|
|
struct osmo_modbus_read_mult_hold_reg_req_param *param;
|
|
|
|
prim = (struct osmo_modbus_prim *) msgb_put(msg, sizeof(*prim));
|
|
osmo_prim_init(&prim->oph, MODBUS_SAP,
|
|
OSMO_MODBUS_PRIM_N_MULT_HOLD_REG,
|
|
PRIM_OP_REQUEST, msg);
|
|
prim->address = address;
|
|
param = &prim->u.read_mult_hold_reg_req;
|
|
param->first_reg = first_reg;
|
|
param->num_reg = num_reg;
|
|
return prim;
|
|
}
|
|
|
|
struct osmo_modbus_prim *osmo_modbus_makeprim_mult_hold_reg_resp(uint16_t address, uint8_t num_reg, uint16_t *registers)
|
|
{
|
|
struct msgb *msg = modbus_prim_msgb_alloc(__func__);
|
|
struct osmo_modbus_prim *prim;
|
|
struct osmo_modbus_read_mult_hold_reg_resp_param *param;
|
|
|
|
prim = (struct osmo_modbus_prim *) msgb_put(msg, sizeof(*prim));
|
|
osmo_prim_init(&prim->oph, MODBUS_SAP,
|
|
OSMO_MODBUS_PRIM_N_MULT_HOLD_REG,
|
|
PRIM_OP_RESPONSE, msg);
|
|
prim->address = address;
|
|
param = &prim->u.read_mult_hold_reg_resp;
|
|
param->num_reg = num_reg;
|
|
memcpy(param->registers, registers, num_reg * sizeof(uint16_t));
|
|
return prim;
|
|
}
|