test-master-random.c
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/*
* Copyright (C) 2008 Stéphane Raimbault <stephane.raimbault@gmail.com>
*
* Licensed under the GNU General Public License Version 2
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <modbus/modbus.h>
/* The goal of this program is to check all major functions of
libmodbus:
- force_single_coil
- read_coil_status
- force_multiple_coils
- preset_single_register
- read_holding_registers
- preset_multiple_registers
- read_holding_registers
All these functions are called with random values on a address
range defined by following defines.
This program is also really useful to test your remote target unit.
*/
#define LOOP 1
#define SLAVE 0x11
#define ADDR_MIN 0
#define ADDR_MAX 499
#define FIELDS 500
int main(void)
{
int ok, fail;
int loop_nb;
int addr;
int field_nb;
int *tab_rq;
int *tab_rq_bits;
int *tab_rp;
modbus_param_t mb_param;
/* RTU parity : none, even, odd */
/* modbus_init_rtu(&mb_param, "/dev/ttyS0", 19200, "none", 8, 1); */
/* TCP */
modbus_init_tcp(&mb_param, "192.168.0.100", MODBUS_TCP_DEFAULT_PORT);
modbus_set_debug(&mb_param, TRUE);
modbus_connect(&mb_param);
/* Allocate and initialize the different memory spaces */
tab_rq = (int *) malloc(FIELDS * sizeof(int));
memset(tab_rq, 0, FIELDS * sizeof(int));
tab_rq_bits = (int *) malloc(FIELDS * sizeof(int));
memset(tab_rq_bits, 0, FIELDS * sizeof(int));
tab_rp = (int *) malloc(FIELDS * sizeof(int));
memset(tab_rp, 0, FIELDS * sizeof(int));
loop_nb = ok = fail = 0;
while (loop_nb++ < LOOP) {
for (addr=ADDR_MIN; addr <= ADDR_MAX; addr++) {
for (field_nb=1; field_nb<=FIELDS; field_nb++) {
int i;
/* Random numbers (short) */
for (i=0; i<field_nb; i++) {
tab_rq[i] = (int) (16536.0*rand()/(RAND_MAX+1.0));
tab_rq_bits[i] = (i) % 2;
}
/* SINGLE COIL */
ok = force_single_coil(&mb_param, SLAVE, addr, tab_rq_bits[0]);
if (ok != 1) {
printf("ERROR force_single_coil (%d)\n", ok);
printf("Slave = %d, address = %d, value = %d\n",
SLAVE, addr, tab_rq_bits[0]);
fail++;
} else {
ok = read_coil_status(&mb_param, SLAVE, addr, 1, tab_rp);
if (ok != 1 || tab_rq_bits[0] != tab_rp[0]) {
printf("ERROR read_coil_status single (%d)\n", ok);
printf("Slave = %d, address = %d\n",
SLAVE, addr);
fail++;
}
}
/* MULTIPLE COILS */
ok = force_multiple_coils(&mb_param, SLAVE, addr, field_nb, tab_rq_bits);
if (ok != field_nb) {
printf("ERROR force_multiple_coils (%d)\n", ok);
printf("Slave = %d, address = %d, field_nb = %d\n",
SLAVE, addr, field_nb);
fail++;
} else {
ok = read_coil_status(&mb_param, SLAVE, addr,
field_nb, tab_rp);
if (ok != field_nb) {
printf("ERROR read_coil_status\n");
printf("Slave = %d, address = %d, field_nb = %d\n",
SLAVE, addr, field_nb);
fail++;
} else {
for (i=0; i<field_nb; i++) {
if (tab_rp[i] != tab_rq_bits[i]) {
printf("ERROR read_coil_status ");
printf("(%d != %d)\n", tab_rp[i], tab_rq_bits[i]);
printf("Slave = %d, address = %d\n",
SLAVE, addr);
fail++;
}
}
}
}
/* SINGLE REGISTER */
ok = preset_single_register(&mb_param, SLAVE, addr, tab_rq[0]);
if (ok != 1) {
printf("ERROR preset_single_register (%d)\n", ok);
printf("Slave = %d, address = %d, value = %d\n",
SLAVE, addr, tab_rq[0]);
fail++;
} else {
ok = read_holding_registers(&mb_param, SLAVE,
addr, 1, tab_rp);
if (ok != 1) {
printf("ERROR read_holding_registers single (%d)\n", ok);
printf("Slave = %d, address = %d\n",
SLAVE, addr);
fail++;
} else {
if (tab_rq[0] != tab_rp[0]) {
printf("ERROR read_holding_registers single ");
printf("(%d != %d)\n",
tab_rq[0], tab_rp[0]);
printf("Slave = %d, address = %d\n",
SLAVE, addr);
fail++;
}
}
}
/* MULTIPLE REGISTERS */
ok = preset_multiple_registers(&mb_param, SLAVE,
addr, field_nb, tab_rq);
if (ok != field_nb) {
printf("ERROR preset_multiple_registers (%d)\n", ok);
printf("Slave = %d, address = %d, field_nb = %d\n",
SLAVE, addr, field_nb);
fail++;
} else {
ok = read_holding_registers(&mb_param, SLAVE,
addr, field_nb, tab_rp);
if (ok != field_nb) {
printf("ERROR read_holding_registers (%d)\n", ok);
printf("Slave = %d, address = %d, field_nb = %d\n",
SLAVE, addr, field_nb);
fail++;
} else {
for (i=0; i<field_nb; i++) {
if (tab_rq[i] != tab_rp[i]) {
printf("ERROR read_holding_registers ");
printf("(%d != %d)\n",
tab_rq[i], tab_rp[i]);
printf("Slave = %d, address = %d\n",
SLAVE, addr);
fail++;
}
}
}
}
}
if (fail)
printf("Address : %d - Fails sum : %d\n", addr, fail);
else
printf("Address : %d - OK\n", addr);
}
}
/* Free the memory */
free(tab_rp);
free(tab_rq);
free(tab_rq_bits);
/* Close the connection */
modbus_close(&mb_param);
return 0;
}