brewco/brewco.c

/*****************************************************************************
 * Copyright (C) 2015
 *   
 * Michiel Broek <mbroek at mbse dot eu>
 *
 * This file is part of the mbsePi-apps
 *
 * This 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, or (at your option) any
 * later version.
 *
 * mbsePi-apps 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 ThermFerm; see the file COPYING.  If not, write to the Free
 * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *****************************************************************************/

#include "brewco.h"
#include "rdconfig.h"
#include "rdsession.h"
#include "futil.h"
#include "xutil.h"
#include "lcd-pcf8574.h"
#include "slcd.h"
#include "lock.h"
#include "devices.h"
#include "keyboard.h"
#include "simulator.h"
#include "prompt.h"
#include "setup.h"


int			my_shutdown = FALSE;
extern int              debug;
extern sys_config       Config;
extern int              lcdHandle;
extern int		slcdHandle;
extern int		sock;

#ifndef HAVE_WIRINGPI_H
pthread_t               threads[5];
#endif


void help(void);
void die(int);


void help(void)
{
    fprintf(stdout, "mbsePi-apps brewco v%s starting\n\n", VERSION);
    fprintf(stdout, "Usage: brewco [-d] [-h]\n");
    fprintf(stdout, "  -d --debug              Debug and run in foreground\n");
    fprintf(stdout, "  -h --help               Display this help\n");
}


void die(int onsig)
{
    switch (onsig) {
	case SIGHUP:    syslog(LOG_NOTICE, "Got SIGHUP, shutting down");
			break;
	case SIGINT:    syslog(LOG_NOTICE, "Keyboard interrupt, shutting down");
			break;
	case SIGTERM:   syslog(LOG_NOTICE, "Got SIGTERM, shutting down");
			break;
	case SIGSEGV:   syslog(LOG_NOTICE, "Got SIGSEGV, shutting down");
			my_shutdown = TRUE;
			exit(SIGSEGV);
			break;
	default:        syslog(LOG_NOTICE, "die() on signal %d", onsig);
    }

    my_shutdown = TRUE;
}


int server(void);
int server(void)
{
    int 		rc = 0, run = 1, key;
    units_list		*unit;
    brew_session	*brew = NULL;
#ifndef HAVE_WIRINGPI_H
    long		t = 0;
#endif

//    if (lockprog((char *)"brewco")) {
//	syslog(LOG_NOTICE, "Can't lock");
//	return 1;
//    }

    if (debug)
	fprintf(stdout, "Begin server()\n");

    if ((rc = devices_detect())) {
	syslog(LOG_NOTICE, "Detected %d new devices", rc);
	if (debug)
	    fprintf(stdout, "Detected %d new devices\n", rc);
	wrconfig();
    }

#ifdef HAVE_WIRINGPI_H
    rc = piThreadCreate(my_devices_loop);
#else
    rc = pthread_create(&threads[t], NULL, my_devices_loop, (void *)t );
#endif
    if (rc) {
	fprintf(stderr, "my_devices_loop thread didn't start rc=%d\n", rc);
	syslog(LOG_NOTICE, "my_devices_loop thread didn't start rc=%d", rc);
#ifndef HAVE_WIRINGPI_H
    } else {
	t++;
#endif
    }

#ifdef HAVE_WIRINGPI_H
    rc = piThreadCreate(my_keyboard_loop);
#else
    rc = pthread_create(&threads[t], NULL, my_keyboard_loop, (void *)t );
#endif
    if (rc) {
	fprintf(stderr, "my_keyboard_loop thread didn't start rc=%d\n", rc);
	syslog(LOG_NOTICE, "my_keyboard_loop thread didn't start rc=%d", rc);
#ifndef HAVE_WIRINGPI_H
    } else {
	t++;
#endif
    }

#ifdef USE_SIMULATOR
#ifdef HAVE_WIRINGPI_H
    rc = piThreadCreate(my_simulator_loop);
#else
    rc = pthread_create(&threads[t], NULL, my_simulator_loop, (void *)t );
#endif
    if (rc) {
	fprintf(stderr, "my_simulator_loop thread didn't start rc=%d\n", rc);
	syslog(LOG_NOTICE, "my_simulator_loop thread didn't start rc=%d", rc);
#ifndef HAVE_WIRINGPI_H
    } else {
	t++;
#endif
    }
#endif

    /*
     * Initialize units for processing
     */
    for (unit = Config.units; unit; unit = unit->next) {
	/*
	 * Safety, turn everything off
	 */
	if (unit->active) {
	    if (unit->hlt_heater)
	    	unit->hlt_heater->value = 0;
	    if (unit->mlt_heater)
	    	unit->mlt_heater->value = 0;
	    if (unit->mlt_pump)
		unit->mlt_pump->value = 0;
	}
    }

    prompt(101);
    if (! Config.units) {
	/*
	 * No brewsystems defined, add the first
	 */
	prompt(218);	/*   Add Brewsystem?   */
	prompt(407);    /* ---  ---   Ok   --- */

	do {
	    key = keywait();
	} while (key != KEY_RETURN);

	if (key == KEY_RETURN) {
	    addUnit(1);
	}
    }

    /*
     * During automation there will be a state file:
     * ~/.brewco/var/brewing.xml
     * If this file is present, there has been a crash.
     */
    brew = (brew_session *)malloc(sizeof(brew_session));
    if (rdsession(brew) == 0) {
    } else {
	/*
	 * No active brew session, make that permanent.
	 */
	free(brew);
	brew = NULL;
    }

    do {
	if (my_shutdown) {
	    run = 0;
	    break;
	}

	if (brew) {
	    /*
	     * Automate mode
	     */

	} else {
	    /*
	     * Not running.
	     */
	    prompt(0);
	    prompt(101);
	    prompt(401);
	    key = keywait();
	    if (key == KEY_ENTER)
		setup();
	}

	usleep(100000);

    } while (run);

    syslog(LOG_NOTICE, "Out of loop");
    if (debug)
	fprintf(stdout, (char *)"Out of loop\n");

    prompt(0);
    prompt(101);
    prompt(302);

    /*
     * Stop units processing in a neat way
     */
    for (unit = Config.units; unit; unit = unit->next) {

    }

    /*
     * Give threads time to cleanup
     */
    usleep(1500000);

    prompt(0);
//    stopLCD();
    if (sock != -1) {
	if (shutdown(sock, SHUT_RDWR)) {
	    syslog(LOG_NOTICE, "Can't shutdown socket: %s", strerror(errno));
	}
	sock = -1;
    }
    wrconfig();
//    ulockprog((char *)"brewco");
    return 0;
}


int main(int argc, char *argv[])
{
    int		rc = 0, c, i;

    while (1) {
	int option_index = 0;
	static struct option long_options[] = {
	    {"debug", 0, 0, 'c'},
	    {"help", 0, 0, 'h'},
	    {0, 0, 0, 0}
	};

	c = getopt_long(argc, argv, "dh", long_options, &option_index);
	if (c == -1)
	    break;

	switch (c) {
	    case 'd':   debug = TRUE;
			break;
	    case 'h':   help();
			return 1;
	}
    }

    openlog("brewco", LOG_PID|LOG_CONS|LOG_NOWAIT, LOG_USER);
    syslog(LOG_NOTICE, "mbsePi-apps brewco v%s starting", VERSION);
    if (debug)
	fprintf(stdout, "mbsePi-apps brewco v%s starting\n", VERSION);

    if (rdconfig()) {
	fprintf(stderr, "Error reading configuration\n");
	syslog(LOG_NOTICE, "Error reading configuration: halted");
	return 1;
    }
    if (debug)
	fprintf(stdout, "configuration loaded\n");

    /*
     *  Catch all the signals we can, and ignore the rest. Note that SIGKILL can't be ignored
     *  but that's live. This daemon should only be stopped by SIGTERM.
     *  Don't catch SIGCHLD.
     */
    for (i = 0; i < NSIG; i++) {
	if ((i != SIGCHLD) && (i != SIGKILL) && (i != SIGSTOP))
	    signal(i, (void (*))die);
    }

#ifdef HAVE_WIRINGPI_H
    if (wiringPiSetup () )
	return 1;
#endif

    if ((rc = initLCD (Config.lcd_cols, Config.lcd_rows))) {
	fprintf(stderr, "Cannot initialize LCD display, rc=%d\n", rc);
	return 1;
    }

    rc = server();

    syslog(LOG_NOTICE, "Finished, rc=%d", rc);
    if (debug)
	fprintf(stdout, "Finished, rc=%d\n", rc);
    return rc;
}