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/*
fan_ctrl: a sample program to turn on/off Netwinder Rev5 fan
Copyright 1998 woody@corelcomputer.com
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include "therm.h"
int
main (int argc, char **argv)
{
int fd = 0;
int fan_new = 1; //assume fan to be turned ON
int fan_old = 0;
char *basename;
char *p;
struct therm old_therm;
struct therm kick_fan;
// printf("\nargc=%d, argv:[0]=%s, [1]=%s.\n\n",
// argc,argv[0],argv[1]);
basename = (p = strrchr (argv[0], '/')) ? p + 1 : argv[0];
if (argc < 2)
{
fprintf (stderr, "\nNetWinder Fan Control program, Corel Computer 1998.\nUsage: %s ON or OFF or START.\n\n",
basename);
}
else if ((strcasecmp (argv[1], "ON")) == 0)
{
fan_new = 1;
}
else if ((strcasecmp (argv[1], "OFF")) == 0)
{
fan_new = 0;
}
else if ((strcasecmp (argv[1], "START")) == 0)
{
fan_new = 3;
}
else
{
fprintf (stderr, "%s: unable to parse ON/OFF/START command (\"%s\")???.\n",
basename, argv[1]);
return EXIT_FAILURE;
}
fd = open ("/dev/temperature", O_RDWR);
if (fd < 0)
{
printf ("Error %d opening /dev/temperature\n", fd);
return EXIT_FAILURE;
}
// else
// {
// printf("/dev/temperature open OK, rc = 0x%X.\n",fd);
// }
ioctl (fd, CMD_GET_FAN, &fan_old);
if (!errno)
printf ("Current fan setting: %s.\n", fan_old ? "ON" : "OFF");
else
{
printf ("Error 0x%X getting fan setting.\n", errno);
return EXIT_FAILURE;
}
if (argc >= 2)
{
ioctl (fd, CMD_SET_FAN, &fan_new);
if (!errno)
printf ("New fan setting: %s.\n", fan_new ? "ON" : "OFF");
else
printf ("Error 0x%X setting the fan.\n", errno);
}
//if turning fan ON or START
if (((fan_old != fan_new) && fan_new) || fan_new == 3)
{
//remember the current setting
ioctl (fd, CMD_GET_THERMOSTATE2, &old_therm);
//temporary set therm at 0
kick_fan.hi = 1;
kick_fan.lo = 0;
ioctl (fd, CMD_SET_THERMOSTATE2, &kick_fan);
//give the fan a moment to start
sleep (2);
//and restore the old thermostat setting
ioctl (fd, CMD_SET_THERMOSTATE2, &old_therm);
}
if (close (fd) != 0)
printf ("Error closing /dev/temperature\n");
return EXIT_SUCCESS;
}
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