examples/user/main.c
author Florian Pose <fp@igh-essen.com>
Tue, 20 Dec 2011 11:12:04 +0100
branchstable-1.5
changeset 2180 912d70d6f0e5
parent 1508 60a116ed3897
child 2421 bc2d4bf9cbe5
child 2589 2b9c78543663
permissions -rw-r--r--
Removed some locks causing latency when using the library; added ioctl()
latency debugging; fixed FoE memory leaks in error case.
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/*****************************************************************************
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 *
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 *  $Id$
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 *
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 *  Copyright (C) 2007-2009  Florian Pose, Ingenieurgemeinschaft IgH
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 *
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 *  This file is part of the IgH EtherCAT Master.
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 *
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 *  The IgH EtherCAT Master is free software; you can redistribute it and/or
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 *  modify it under the terms of the GNU General Public License version 2, as
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 *  published by the Free Software Foundation.
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 *
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 *  The IgH EtherCAT Master is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
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 *  Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License along
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 *  with the IgH EtherCAT Master; if not, write to the Free Software
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 *
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 *  ---
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 *
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 *  The license mentioned above concerns the source code only. Using the
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 *  EtherCAT technology and brand is only permitted in compliance with the
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 *  industrial property and similar rights of Beckhoff Automation GmbH.
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 *
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 ****************************************************************************/
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#include <errno.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/resource.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <unistd.h>
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/****************************************************************************/
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#include "ecrt.h"
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/****************************************************************************/
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// Application parameters
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#define FREQUENCY 100
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#define PRIORITY 1
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// Optional features
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#define CONFIGURE_PDOS  1
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#define SDO_ACCESS      0
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/****************************************************************************/
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// EtherCAT
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static ec_master_t *master = NULL;
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static ec_master_state_t master_state = {};
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static ec_domain_t *domain1 = NULL;
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static ec_domain_state_t domain1_state = {};
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static ec_slave_config_t *sc_ana_in = NULL;
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static ec_slave_config_state_t sc_ana_in_state = {};
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// Timer
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static unsigned int sig_alarms = 0;
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static unsigned int user_alarms = 0;
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/****************************************************************************/
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// process data
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static uint8_t *domain1_pd = NULL;
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#define BusCouplerPos  0, 0
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#define DigOutSlavePos 0, 2
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#define AnaInSlavePos  0, 3
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#define AnaOutSlavePos 0, 4
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#define Beckhoff_EK1100 0x00000002, 0x044c2c52
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#define Beckhoff_EL2004 0x00000002, 0x07d43052
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#define Beckhoff_EL2032 0x00000002, 0x07f03052
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#define Beckhoff_EL3152 0x00000002, 0x0c503052
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#define Beckhoff_EL3102 0x00000002, 0x0c1e3052
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#define Beckhoff_EL4102 0x00000002, 0x10063052
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// offsets for PDO entries
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static unsigned int off_ana_in_status;
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static unsigned int off_ana_in_value;
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static unsigned int off_ana_out;
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static unsigned int off_dig_out;
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const static ec_pdo_entry_reg_t domain1_regs[] = {
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    {AnaInSlavePos,  Beckhoff_EL3102, 0x3101, 1, &off_ana_in_status},
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    {AnaInSlavePos,  Beckhoff_EL3102, 0x3101, 2, &off_ana_in_value},
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    {AnaOutSlavePos, Beckhoff_EL4102, 0x3001, 1, &off_ana_out},
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    {DigOutSlavePos, Beckhoff_EL2032, 0x3001, 1, &off_dig_out},
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    {}
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};
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static unsigned int counter = 0;
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static unsigned int blink = 0;
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/*****************************************************************************/
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#if CONFIGURE_PDOS
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// Analog in --------------------------
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static ec_pdo_entry_info_t el3102_pdo_entries[] = {
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    {0x3101, 1,  8}, // channel 1 status
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    {0x3101, 2, 16}, // channel 1 value
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    {0x3102, 1,  8}, // channel 2 status
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    {0x3102, 2, 16}, // channel 2 value
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    {0x6401, 1, 16}, // channel 1 value (alt.)
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    {0x6401, 2, 16}  // channel 2 value (alt.)
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};
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static ec_pdo_info_t el3102_pdos[] = {
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    {0x1A00, 2, el3102_pdo_entries},
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    {0x1A01, 2, el3102_pdo_entries + 2}
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};
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static ec_sync_info_t el3102_syncs[] = {
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    {2, EC_DIR_OUTPUT},
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    {3, EC_DIR_INPUT, 2, el3102_pdos},
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    {0xff}
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};
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// Analog out -------------------------
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static ec_pdo_entry_info_t el4102_pdo_entries[] = {
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    {0x3001, 1, 16}, // channel 1 value
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    {0x3002, 1, 16}, // channel 2 value
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};
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static ec_pdo_info_t el4102_pdos[] = {
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    {0x1600, 1, el4102_pdo_entries},
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    {0x1601, 1, el4102_pdo_entries + 1}
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};
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static ec_sync_info_t el4102_syncs[] = {
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    {2, EC_DIR_OUTPUT, 2, el4102_pdos},
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    {3, EC_DIR_INPUT},
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    {0xff}
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};
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// Digital out ------------------------
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static ec_pdo_entry_info_t el2004_channels[] = {
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    {0x3001, 1, 1}, // Value 1
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    {0x3001, 2, 1}, // Value 2
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    {0x3001, 3, 1}, // Value 3
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    {0x3001, 4, 1}  // Value 4
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};
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static ec_pdo_info_t el2004_pdos[] = {
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    {0x1600, 1, &el2004_channels[0]},
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    {0x1601, 1, &el2004_channels[1]},
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    {0x1602, 1, &el2004_channels[2]},
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    {0x1603, 1, &el2004_channels[3]}
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};
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static ec_sync_info_t el2004_syncs[] = {
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    {0, EC_DIR_OUTPUT, 4, el2004_pdos},
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    {1, EC_DIR_INPUT},
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    {0xff}
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};
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#endif
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/*****************************************************************************/
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#if SDO_ACCESS
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static ec_sdo_request_t *sdo;
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#endif
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/*****************************************************************************/
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void check_domain1_state(void)
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{
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    ec_domain_state_t ds;
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    ecrt_domain_state(domain1, &ds);
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    if (ds.working_counter != domain1_state.working_counter)
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        printf("Domain1: WC %u.\n", ds.working_counter);
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    if (ds.wc_state != domain1_state.wc_state)
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        printf("Domain1: State %u.\n", ds.wc_state);
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    domain1_state = ds;
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}
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/*****************************************************************************/
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void check_master_state(void)
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{
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    ec_master_state_t ms;
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    ecrt_master_state(master, &ms);
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    if (ms.slaves_responding != master_state.slaves_responding)
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        printf("%u slave(s).\n", ms.slaves_responding);
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    if (ms.al_states != master_state.al_states)
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        printf("AL states: 0x%02X.\n", ms.al_states);
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    if (ms.link_up != master_state.link_up)
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        printf("Link is %s.\n", ms.link_up ? "up" : "down");
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    master_state = ms;
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}
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/*****************************************************************************/
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void check_slave_config_states(void)
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{
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    ec_slave_config_state_t s;
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    ecrt_slave_config_state(sc_ana_in, &s);
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    if (s.al_state != sc_ana_in_state.al_state)
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        printf("AnaIn: State 0x%02X.\n", s.al_state);
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    if (s.online != sc_ana_in_state.online)
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        printf("AnaIn: %s.\n", s.online ? "online" : "offline");
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    if (s.operational != sc_ana_in_state.operational)
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        printf("AnaIn: %soperational.\n",
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                s.operational ? "" : "Not ");
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    sc_ana_in_state = s;
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}
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/*****************************************************************************/
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#if SDO_ACCESS
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void read_sdo(void)
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{
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    switch (ecrt_sdo_request_state(sdo)) {
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        case EC_REQUEST_UNUSED: // request was not used yet
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            ecrt_sdo_request_read(sdo); // trigger first read
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            break;
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        case EC_REQUEST_BUSY:
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            fprintf(stderr, "Still busy...\n");
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            break;
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        case EC_REQUEST_SUCCESS:
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            fprintf(stderr, "SDO value: 0x%04X\n",
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                    EC_READ_U16(ecrt_sdo_request_data(sdo)));
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            ecrt_sdo_request_read(sdo); // trigger next read
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            break;
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        case EC_REQUEST_ERROR:
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            fprintf(stderr, "Failed to read SDO!\n");
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            ecrt_sdo_request_read(sdo); // retry reading
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            break;
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    }
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}
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#endif
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   253
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/****************************************************************************/
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void cyclic_task()
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{
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    int i;
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    // receive process data
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    ecrt_master_receive(master);
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    ecrt_domain_process(domain1);
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    // check process data state (optional)
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    check_domain1_state();
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    if (counter) {
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        counter--;
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   269
    } else { // do this at 1 Hz
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   270
        counter = FREQUENCY;
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   271
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   272
        // calculate new process data
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   273
        blink = !blink;
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   274
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   275
        // check for master state (optional)
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   276
        check_master_state();
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   277
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   278
        // check for islave configuration state(s) (optional)
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   279
        check_slave_config_states();
1352
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   280
275d2fdeab48 Implemented SDO requests in userspace library.
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   281
#if SDO_ACCESS
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   282
        // read process data SDO
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   283
        read_sdo();
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   284
#endif
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   285
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   286
    }
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   287
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   288
#if 0
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   289
    // read process data
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diff changeset
   290
    printf("AnaIn: state %u value %u\n",
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diff changeset
   291
            EC_READ_U8(domain1_pd + off_ana_in_status),
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diff changeset
   292
            EC_READ_U16(domain1_pd + off_ana_in_value));
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   293
#endif
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   294
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   295
#if 1
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   296
    // write process data
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diff changeset
   297
    EC_WRITE_U8(domain1_pd + off_dig_out, blink ? 0x06 : 0x09);
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   298
#endif
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   299
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   300
    // send process data
1258
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   301
    ecrt_domain_queue(domain1);
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   302
    ecrt_master_send(master);
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   303
}
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   304
900f1124e8f8 Memory-mapped process data.
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   305
/****************************************************************************/
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   306
1247
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
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   307
void signal_handler(int signum) {
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
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   308
    switch (signum) {
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
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diff changeset
   309
        case SIGALRM:
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   310
            sig_alarms++;
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   311
            break;
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   312
    }
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   313
}
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
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   314
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
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   315
/****************************************************************************/
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   316
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   317
int main(int argc, char **argv)
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{
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60a116ed3897 Removed more tabulators.
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   319
    ec_slave_config_t *sc;
1247
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   320
    struct sigaction sa;
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diff changeset
   321
    struct itimerval tv;
1244
0b70040d3daa No kernel handles in userspace; Domain creation.
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diff changeset
   322
    
0b70040d3daa No kernel handles in userspace; Domain creation.
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   323
    master = ecrt_request_master(0);
1508
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   324
    if (!master)
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   325
        return -1;
1242
632a6b91f8e4 First version of userspace library with requesting/releasing.
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   326
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   327
    domain1 = ecrt_master_create_domain(master);
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   328
    if (!domain1)
38b7e05b20c1 Added some slave configuration methods.
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   329
        return -1;
38b7e05b20c1 Added some slave configuration methods.
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   330
38b7e05b20c1 Added some slave configuration methods.
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diff changeset
   331
    if (!(sc_ana_in = ecrt_master_slave_config(
1352
275d2fdeab48 Implemented SDO requests in userspace library.
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diff changeset
   332
                    master, AnaInSlavePos, Beckhoff_EL3102))) {
1255
38b7e05b20c1 Added some slave configuration methods.
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diff changeset
   333
        fprintf(stderr, "Failed to get slave configuration.\n");
38b7e05b20c1 Added some slave configuration methods.
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diff changeset
   334
        return -1;
38b7e05b20c1 Added some slave configuration methods.
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diff changeset
   335
    }
38b7e05b20c1 Added some slave configuration methods.
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diff changeset
   336
1352
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diff changeset
   337
#if SDO_ACCESS
275d2fdeab48 Implemented SDO requests in userspace library.
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diff changeset
   338
    fprintf(stderr, "Creating SDO requests...\n");
275d2fdeab48 Implemented SDO requests in userspace library.
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diff changeset
   339
    if (!(sdo = ecrt_slave_config_create_sdo_request(sc_ana_in, 0x3102, 2, 2))) {
275d2fdeab48 Implemented SDO requests in userspace library.
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diff changeset
   340
        fprintf(stderr, "Failed to create SDO request.\n");
275d2fdeab48 Implemented SDO requests in userspace library.
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   341
        return -1;
275d2fdeab48 Implemented SDO requests in userspace library.
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diff changeset
   342
    }
275d2fdeab48 Implemented SDO requests in userspace library.
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diff changeset
   343
    ecrt_sdo_request_timeout(sdo, 500); // ms
275d2fdeab48 Implemented SDO requests in userspace library.
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   344
#endif
275d2fdeab48 Implemented SDO requests in userspace library.
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   345
1255
38b7e05b20c1 Added some slave configuration methods.
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diff changeset
   346
#if CONFIGURE_PDOS
1327
4d179b06dd3c merge -c1604 branches/stable-1.4: Fixed spelling of EtherCAT terms.
Florian Pose <fp@igh-essen.com>
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diff changeset
   347
    printf("Configuring PDOs...\n");
1352
275d2fdeab48 Implemented SDO requests in userspace library.
Florian Pose <fp@igh-essen.com>
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diff changeset
   348
    if (ecrt_slave_config_pdos(sc_ana_in, EC_END, el3102_syncs)) {
1327
4d179b06dd3c merge -c1604 branches/stable-1.4: Fixed spelling of EtherCAT terms.
Florian Pose <fp@igh-essen.com>
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diff changeset
   349
        fprintf(stderr, "Failed to configure PDOs.\n");
1255
38b7e05b20c1 Added some slave configuration methods.
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diff changeset
   350
        return -1;
38b7e05b20c1 Added some slave configuration methods.
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diff changeset
   351
    }
38b7e05b20c1 Added some slave configuration methods.
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diff changeset
   352
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
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diff changeset
   353
    if (!(sc = ecrt_master_slave_config(
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   354
                    master, AnaOutSlavePos, Beckhoff_EL4102))) {
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   355
        fprintf(stderr, "Failed to get slave configuration.\n");
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   356
        return -1;
38b7e05b20c1 Added some slave configuration methods.
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parents: 1249
diff changeset
   357
    }
38b7e05b20c1 Added some slave configuration methods.
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diff changeset
   358
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   359
    if (ecrt_slave_config_pdos(sc, EC_END, el4102_syncs)) {
1327
4d179b06dd3c merge -c1604 branches/stable-1.4: Fixed spelling of EtherCAT terms.
Florian Pose <fp@igh-essen.com>
parents: 1326
diff changeset
   360
        fprintf(stderr, "Failed to configure PDOs.\n");
1255
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
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diff changeset
   361
        return -1;
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   362
    }
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   363
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   364
    if (!(sc = ecrt_master_slave_config(
1259
5f9d1abbee71 Added state functions; writing of process data works.
Florian Pose <fp@igh-essen.com>
parents: 1258
diff changeset
   365
                    master, DigOutSlavePos, Beckhoff_EL2032))) {
1255
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   366
        fprintf(stderr, "Failed to get slave configuration.\n");
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   367
        return -1;
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   368
    }
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   369
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   370
    if (ecrt_slave_config_pdos(sc, EC_END, el2004_syncs)) {
1327
4d179b06dd3c merge -c1604 branches/stable-1.4: Fixed spelling of EtherCAT terms.
Florian Pose <fp@igh-essen.com>
parents: 1326
diff changeset
   371
        fprintf(stderr, "Failed to configure PDOs.\n");
1255
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   372
        return -1;
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   373
    }
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   374
#endif
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   375
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   376
    // Create configuration for bus coupler
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   377
    sc = ecrt_master_slave_config(master, BusCouplerPos, Beckhoff_EK1100);
1246
4042bda8c980 Creating slave configurations.
Florian Pose <fp@igh-essen.com>
parents: 1244
diff changeset
   378
    if (!sc)
4042bda8c980 Creating slave configurations.
Florian Pose <fp@igh-essen.com>
parents: 1244
diff changeset
   379
        return -1;
4042bda8c980 Creating slave configurations.
Florian Pose <fp@igh-essen.com>
parents: 1244
diff changeset
   380
1255
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   381
    if (ecrt_domain_reg_pdo_entry_list(domain1, domain1_regs)) {
1327
4d179b06dd3c merge -c1604 branches/stable-1.4: Fixed spelling of EtherCAT terms.
Florian Pose <fp@igh-essen.com>
parents: 1326
diff changeset
   382
        fprintf(stderr, "PDO entry registration failed!\n");
1508
60a116ed3897 Removed more tabulators.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   383
        return -1;
1255
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   384
    }
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   385
1249
d64ed42e0d11 Userspace example with priority.
Florian Pose <fp@igh-essen.com>
parents: 1247
diff changeset
   386
    printf("Activating master...\n");
1247
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   387
    if (ecrt_master_activate(master))
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   388
        return -1;
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   389
1258
900f1124e8f8 Memory-mapped process data.
Florian Pose <fp@igh-essen.com>
parents: 1255
diff changeset
   390
    if (!(domain1_pd = ecrt_domain_data(domain1))) {
900f1124e8f8 Memory-mapped process data.
Florian Pose <fp@igh-essen.com>
parents: 1255
diff changeset
   391
        return -1;
900f1124e8f8 Memory-mapped process data.
Florian Pose <fp@igh-essen.com>
parents: 1255
diff changeset
   392
    }
900f1124e8f8 Memory-mapped process data.
Florian Pose <fp@igh-essen.com>
parents: 1255
diff changeset
   393
1249
d64ed42e0d11 Userspace example with priority.
Florian Pose <fp@igh-essen.com>
parents: 1247
diff changeset
   394
#if PRIORITY
d64ed42e0d11 Userspace example with priority.
Florian Pose <fp@igh-essen.com>
parents: 1247
diff changeset
   395
    pid_t pid = getpid();
d64ed42e0d11 Userspace example with priority.
Florian Pose <fp@igh-essen.com>
parents: 1247
diff changeset
   396
    if (setpriority(PRIO_PROCESS, pid, -19))
d64ed42e0d11 Userspace example with priority.
Florian Pose <fp@igh-essen.com>
parents: 1247
diff changeset
   397
        fprintf(stderr, "Warning: Failed to set priority: %s\n",
d64ed42e0d11 Userspace example with priority.
Florian Pose <fp@igh-essen.com>
parents: 1247
diff changeset
   398
                strerror(errno));
d64ed42e0d11 Userspace example with priority.
Florian Pose <fp@igh-essen.com>
parents: 1247
diff changeset
   399
#endif
d64ed42e0d11 Userspace example with priority.
Florian Pose <fp@igh-essen.com>
parents: 1247
diff changeset
   400
1247
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   401
    sa.sa_handler = signal_handler;
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   402
    sigemptyset(&sa.sa_mask);
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   403
    sa.sa_flags = 0;
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   404
    if (sigaction(SIGALRM, &sa, 0)) {
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   405
        fprintf(stderr, "Failed to install signal handler!\n");
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   406
        return -1;
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   407
    }
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   408
1249
d64ed42e0d11 Userspace example with priority.
Florian Pose <fp@igh-essen.com>
parents: 1247
diff changeset
   409
    printf("Starting timer...\n");
1247
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   410
    tv.it_interval.tv_sec = 0;
1259
5f9d1abbee71 Added state functions; writing of process data works.
Florian Pose <fp@igh-essen.com>
parents: 1258
diff changeset
   411
    tv.it_interval.tv_usec = 1000000 / FREQUENCY;
1247
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   412
    tv.it_value.tv_sec = 0;
1249
d64ed42e0d11 Userspace example with priority.
Florian Pose <fp@igh-essen.com>
parents: 1247
diff changeset
   413
    tv.it_value.tv_usec = 1000;
1247
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   414
    if (setitimer(ITIMER_REAL, &tv, NULL)) {
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   415
        fprintf(stderr, "Failed to start timer: %s\n", strerror(errno));
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   416
        return 1;
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   417
    }
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   418
1249
d64ed42e0d11 Userspace example with priority.
Florian Pose <fp@igh-essen.com>
parents: 1247
diff changeset
   419
    printf("Started.\n");
1508
60a116ed3897 Removed more tabulators.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   420
    while (1) {
1261
72e04173691f Replaced sleep() with pause().
Florian Pose <fp@igh-essen.com>
parents: 1259
diff changeset
   421
        pause();
1247
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   422
1255
38b7e05b20c1 Added some slave configuration methods.
Florian Pose <fp@igh-essen.com>
parents: 1249
diff changeset
   423
#if 0
1249
d64ed42e0d11 Userspace example with priority.
Florian Pose <fp@igh-essen.com>
parents: 1247
diff changeset
   424
        struct timeval t;
d64ed42e0d11 Userspace example with priority.
Florian Pose <fp@igh-essen.com>
parents: 1247
diff changeset
   425
        gettimeofday(&t, NULL);
d64ed42e0d11 Userspace example with priority.
Florian Pose <fp@igh-essen.com>
parents: 1247
diff changeset
   426
        printf("%u.%06u\n", t.tv_sec, t.tv_usec);
d64ed42e0d11 Userspace example with priority.
Florian Pose <fp@igh-essen.com>
parents: 1247
diff changeset
   427
#endif
d64ed42e0d11 Userspace example with priority.
Florian Pose <fp@igh-essen.com>
parents: 1247
diff changeset
   428
1247
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   429
        while (sig_alarms != user_alarms) {
1258
900f1124e8f8 Memory-mapped process data.
Florian Pose <fp@igh-essen.com>
parents: 1255
diff changeset
   430
            cyclic_task();
1247
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   431
            user_alarms++;
5f1f1a3e6636 Activate, Send and received; cyclic timer with setitimer().
Florian Pose <fp@igh-essen.com>
parents: 1246
diff changeset
   432
        }
1508
60a116ed3897 Removed more tabulators.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   433
    }
60a116ed3897 Removed more tabulators.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   434
60a116ed3897 Removed more tabulators.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   435
    return 0;
60a116ed3897 Removed more tabulators.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   436
}
60a116ed3897 Removed more tabulators.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   437
60a116ed3897 Removed more tabulators.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   438
/****************************************************************************/