Mercurial > mbsePi-apps / file comparison
comparison: thermferm/devices.c
thermferm/devices.c
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| 1 /***************************************************************************** | |
| 2 * Copyright (C) 2014 | |
| 3 * | |
| 4 * Michiel Broek <mbroek at mbse dot eu> | |
| 5 * | |
| 6 * This file is part of the mbsePi-apps | |
| 7 * | |
| 8 * This is free software; you can redistribute it and/or modify it | |
| 9 * under the terms of the GNU General Public License as published by the | |
| 10 * Free Software Foundation; either version 2, or (at your option) any | |
| 11 * later version. | |
| 12 * | |
| 13 * mbsePi-apps is distributed in the hope that it will be useful, but | |
| 14 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 16 * General Public License for more details. | |
| 17 * | |
| 18 * You should have received a copy of the GNU General Public License | |
| 19 * along with thermferm; see the file COPYING. If not, write to the Free | |
| 20 * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
| 21 *****************************************************************************/ | |
| 22 | |
| 23 #include "devices.h" | |
| 24 #include "thermferm.h" | |
| 25 #include "xutil.h" | |
| 26 | |
| 27 | |
| 28 extern int debug; | |
| 29 extern sys_config Config; | |
| 30 extern int my_shutdown; | |
| 31 | |
| 32 | |
| 33 | |
| 34 /* | |
| 35 * Auto detect hotplugged or known to be present devices | |
| 36 */ | |
| 37 int devices_detect(void) | |
| 38 { | |
| 39 struct dirent *de; | |
| 40 // FILE *fp; | |
| 41 DIR *fd; | |
| 42 devices_list *device, *ndev; | |
| 43 int found, subdevices, i, rc = 0; | |
| 44 char *family; | |
| 45 uuid_t uu; | |
| 46 | |
| 47 /* | |
| 48 * Scan for 1-wire devices | |
| 49 */ | |
| 50 if ((fd = opendir((char *)"/sys/bus/w1/devices"))) { | |
| 51 while ((de = readdir(fd))) { | |
| 52 if (de->d_name[0] != '.') { | |
| 53 found = FALSE; | |
| 54 for (device = Config.devices; device; device = device->next) { | |
| 55 if (strcmp(device->address ,de->d_name) == 0) { | |
| 56 found = TRUE; | |
| 57 break; | |
| 58 } | |
| 59 } | |
| 60 | |
| 61 if (found == FALSE) { | |
| 62 family = malloc(3); | |
| 63 strncpy(family, de->d_name, 2); | |
| 64 subdevices = 1; | |
| 65 if (strcmp(family, (char *)"29") == 0) | |
| 66 subdevices = 8; | |
| 67 if (strcmp(family, (char *)"3a") == 0) | |
| 68 subdevices = 2; | |
| 69 for (i = 0; i < subdevices; i++) { | |
| 70 ndev = (devices_list *)malloc(sizeof(devices_list)); | |
| 71 ndev->next = NULL; | |
| 72 ndev->version = 1; | |
| 73 ndev->uuid = malloc(37); | |
| 74 uuid_generate(uu); | |
| 75 uuid_unparse(uu, ndev->uuid); | |
| 76 ndev->type = DEVTYPE_W1; | |
| 77 ndev->direction = DEVDIR_UNDEF; | |
| 78 if (strcmp(family, (char *)"10") == 0) { | |
| 79 ndev->direction = DEVDIR_IN_ANALOG; | |
| 80 ndev->description = xstrcpy((char *)"18S20,Digital thermometer"); | |
| 81 } else if (strcmp(family, (char *)"28") == 0) { | |
| 82 ndev->direction = DEVDIR_IN_ANALOG; | |
| 83 ndev->description = xstrcpy((char *)"18B20,Digital thermometer"); | |
| 84 } else if (strcmp(family, (char *)"29") == 0) { | |
| 85 ndev->description = xstrcpy((char *)"2408,8 Channel addressable switch/LCD"); | |
| 86 } else if (strcmp(family, (char *)"3a") == 0) { | |
| 87 ndev->description = xstrcpy((char *)"2413,Dual channel addressable switch"); | |
| 88 } else if (strcmp(family, (char *)"w1") == 0) { | |
| 89 ndev->description = xstrcpy((char *)"Master System device"); | |
| 90 } else { | |
| 91 ndev->description = xstrcpy((char *)"Unknown device family "); | |
| 92 ndev->description = xstrcat(ndev->description, family); | |
| 93 } | |
| 94 ndev->value = ndev->inuse = 0; | |
| 95 ndev->present = DEVPRESENT_YES; | |
| 96 ndev->address = xstrcpy(de->d_name); | |
| 97 ndev->subdevice = i; | |
| 98 ndev->gpiopin = -1; | |
| 99 ndev->comment = xstrcpy((char *)"Auto detected device"); | |
| 100 ndev->timestamp = time(NULL); | |
| 101 | |
| 102 if (Config.devices == NULL) { | |
| 103 Config.devices = ndev; | |
| 104 } else { | |
| 105 for (device = Config.devices; device; device = device->next) { | |
| 106 if (device->next == NULL) | |
| 107 device->next = ndev; | |
| 108 break; | |
| 109 } | |
| 110 } | |
| 111 rc++; | |
| 112 } | |
| 113 } | |
| 114 } | |
| 115 } | |
| 116 } | |
| 117 | |
| 118 return rc; | |
| 119 } | |
| 120 | |
| 121 | |
| 122 | |
| 123 #ifdef HAVE_WIRINGPI_H | |
| 124 PI_THREAD (my_devices_loop) | |
| 125 #else | |
| 126 void *my_devices_loop(void *threadid) | |
| 127 #endif | |
| 128 { | |
| 129 devices_list *device; | |
| 130 // char line[60], *p = NULL; | |
| 131 // FILE *fp; | |
| 132 // int temp, rc, deviation; | |
| 133 | |
| 134 syslog(LOG_NOTICE, "Thread my_devices_loop started"); | |
| 135 if (debug) | |
| 136 fprintf(stdout, "Thread my_devices_loop started\n"); | |
| 137 | |
| 138 /* | |
| 139 * Loop forever until the external shutdown variable is set. | |
| 140 */ | |
| 141 for (;;) { | |
| 142 | |
| 143 /* | |
| 144 * Here send our 1-wire sensors values | |
| 145 */ | |
| 146 for (device = Config.devices; device; device = device->next) { | |
| 147 | |
| 148 if (my_shutdown) | |
| 149 break; | |
| 150 | |
| 151 /* | |
| 152 * Build path to the on-wire sensor | |
| 153 */ | |
| 154 // device = xstrcpy((char *)"/sys/bus/w1/devices/"); | |
| 155 // device = xstrcat(device, tmp1->master); | |
| 156 // device = xstrcat(device, (char *)"/"); | |
| 157 // device = xstrcat(device, tmp1->name); | |
| 158 // device = xstrcat(device, (char *)"/w1_slave"); | |
| 159 | |
| 160 /* | |
| 161 * Read sensor data | |
| 162 */ | |
| 163 // if ((fp = fopen(device, "r"))) { | |
| 164 /* | |
| 165 * The output looks like: | |
| 166 * 72 01 4b 46 7f ff 0e 10 57 : crc=57 YES | |
| 167 * 72 01 4b 46 7f ff 0e 10 57 t=23125 | |
| 168 */ | |
| 169 // fgets(line, 50, fp); | |
| 170 // line[strlen(line)-1] = '\0'; | |
| 171 // if ((line[36] == 'Y') && (line[37] == 'E')) { | |
| 172 /* | |
| 173 * CRC is Ok, continue | |
| 174 */ | |
| 175 // fgets(line, 50, fp); | |
| 176 // line[strlen(line)-1] = '\0'; | |
| 177 // strtok(line, (char *)"="); | |
| 178 // p = strtok(NULL, (char *)"="); | |
| 179 // rc = sscanf(p, "%d", &temp); | |
| 180 // if ((rc == 1) && (tmp1->lastval != temp)) { | |
| 181 /* | |
| 182 * It is possible to have read errors or extreme values. | |
| 183 * This can happen with bad connections so we compare the | |
| 184 * value with the previous one. If the difference is too | |
| 185 * much, we don't send that value. That also means that if | |
| 186 * the next value is ok again, it will be marked invalid too. | |
| 187 * Maximum error is 20 degrees for now. | |
| 188 */ | |
| 189 // deviation = 20000; | |
| 190 // if ( (tmp1->lastval == 0) || | |
| 191 // (tmp1->lastval && (temp > (tmp1->lastval - deviation)) && (temp < (tmp1->lastval + deviation))) ) { | |
| 192 /* | |
| 193 * Temperature is changed and valid, set flag. | |
| 194 */ | |
| 195 // tmp1->update = TRUE; | |
| 196 // } else { | |
| 197 // syslog(LOG_NOTICE, "deviation error deviation=%d, old=%d new=%d", deviation, tmp1->lastval, temp); | |
| 198 // if (debug) { | |
| 199 // fprintf(stdout, "deviation error deviation=%d, old=%d new=%d\n", deviation, tmp1->lastval, temp); | |
| 200 // } | |
| 201 // } | |
| 202 // tmp1->lastval = temp; | |
| 203 // } | |
| 204 // } else { | |
| 205 // syslog(LOG_NOTICE, "sensor %s/%s CRC error", tmp1->master, tmp1->name); | |
| 206 // } | |
| 207 // fclose(fp); | |
| 208 // tmp1->present = 1; | |
| 209 // } else { | |
| 210 // tmp1->present = 0; | |
| 211 // if (debug) | |
| 212 // printf("sensor %s is missing\n", tmp1->name); | |
| 213 // } | |
| 214 | |
| 215 // free(device); | |
| 216 // device = NULL; | |
| 217 } | |
| 218 usleep(10000); | |
| 219 } | |
| 220 | |
| 221 syslog(LOG_NOTICE, "Thread my_devices_loop stopped"); | |
| 222 if (debug) | |
| 223 fprintf(stdout, "Thread my_devices_loop stopped\n"); | |
| 224 | |
| 225 return 0; | |
| 226 } | |
| 227 | |
| 228 | |
| 229 |
