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annotate wh1080.h @ 3:dc5ff2a1ed81

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Be smarter about retries. If the interrupt endpoint can't be read 100 times then retry the whole request.
author Daniel O'Connor <darius@dons.net.au>
date Wed, 10 Feb 2010 11:33:27 +1030
parents 9dab44dcb331
children b22a888eb975
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1 /*
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2 * WH-1080 data input utility.
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3 *
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4 * Greg Lehey, 16 November 2009
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5 *
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6 * $Id: wh1080.h,v 1.9 2010/02/07 03:41:07 grog Exp $
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7 */
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9 #include <errno.h>
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10 #include <stdio.h>
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11 #include <math.h>
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12 #include <sys/file.h>
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13 #include <sys/stat.h>
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14 #include <sys/param.h>
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15 #include <stdint.h>
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16 #include <string.h>
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17 #include <unistd.h>
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18 #include <usb.h>
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19 #include <mysql/mysql.h>
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20 #include <sys/mman.h>
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21 #include <pwd.h>
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23 /* Station description */
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24 #include "wh1080_dev.h"
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26 /* Program-dependent stuff. */
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27 #define WH1080_MAX_RETRIES 5
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28 #define WH1080_READ_TIMEOUT 1000
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29 #define WH1080_WRITE_TIMEOUT 1000
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31 #define STAMPSIZE 32 /* size of time stamp to print out */
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32 #define DATETEXTLENGTH 48 /* more than maximum size of date text */
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33 #define SECSPERHOUR 3600 /* seconds per hour */
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34 #define SECSPERDAY 86400 /* and seconds per day */
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36 /* Conversion factors to archaic units, for Wunderground and friends */
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37 #define KM_TO_MILES 0.6213711922
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38 #define MM_TO_IN 0.039370078
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39 #define C_TO_F(C) (C * 1.8 + 32)
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40 #define hPa_TO_inHg 0.0295299801
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41 /*
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42 * For some reason, Wunderground doesn't adhere to this constant. By
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43 * observation, the constant must be something like this.
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44 *
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45 * 29.87 / 1011.4 = 0.029533320
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46 * 29.88 / 1011.7 = 0.029534446
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47 * 29.89 / 1012.1 = 0.029532654
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48 * 29.90 / 1012.4 = 0.029533781
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49 * Average 0.02953553
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50 *
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51 */
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52 #define Wunder_hPa_TO_inHg 0.02953553
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55 /* OK, this one's not so archaic */
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56 #define KELVIN(C) (C + 273.15)
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58 struct usb_dev_handle {
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59 int fd;
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61 struct usb_bus *bus;
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62 struct usb_device *device;
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64 int config;
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65 int interface;
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66 int altsetting;
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67
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68 /* Added by RMT so implementations can store other per-open-device data */
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69 int *impl_info;
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70 };
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71
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72 /*
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73 * Local configuration, to be read from configuration file.
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74 * If this changes, also change the table definition in db/mkdb.
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75 */
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76 struct config
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77 {
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78 int version; /* format version, for DB */
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79 #define CONFIG_VERSION 1 /* current format version */
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80 float latitude; /* In ° */
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81 float longitude;
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82 float elevation; /* metres */
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83 float pressure_error; /* difference between actual and real pressure, hPa */
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84 int poll_interval; /* time, in seconds, between reading the device */
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85 char *station_id; /* this is the one we use for the database */
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86 char *address; /* Address to display on web pages */
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87 char *wunderground_station_id;
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88 char *wunderground_passwd;
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89 int wunderground_report_interval; /* how many seconds between reports to Wunderground */
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90 char *weatheforyou_station_id;
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91 char *weatheforyou_passwd;
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92 int weatherforyou_report_interval; /* how many seconds between reports to Weather for you */
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93 int website_generation_interval; /* how many seconds between generating PHP header file */
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94 char *db_host; /* database on this host */
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95 char *db_user; /* user ID on host */
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96 char *db_passwd; /* and password */
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97 char *db; /* database name */
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98 char *db_table; /* table */
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99 char *php_header; /* php header file with weather data */
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100 char *comparefile; /* file to compare local weather stations */
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101 };
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102
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103 extern struct config config;
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104 /* Command line options, defined in db.c */
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105 extern int debug; /* -d */
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106 extern int update; /* -n turns updating off */
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107 extern int recover; /* -r: recover missed archive data (wh1080 only) */
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108 extern int verbose; /* -v */
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109 extern int once; /* -1 */
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110
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111 /* MySQL stuff */
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112 extern MYSQL *mysql;
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113 extern MYSQL_RES *mysql_result;
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114 extern MYSQL_ROW mysql_row;
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115 extern char mysql_querytext [1024]; /* build up queries here */
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116
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117
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118 /*
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119 * Readings in sanitized form. These are effectively the readings from the
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120 * station in a format that's easier for us to use.
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121 */
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122
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123 struct readings
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124 {
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125 int page; /* page from whence the readings came */
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126 time_t timestamp; /* time of reading */
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127 int last_save_mins; /* last save minutes (?) */
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128 float inside_temp; /* inside temperature */
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129 int inside_humidity; /* humidity in percent */
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130 float inside_dewpoint; /* dewpoint temperature inside */
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131 float outside_temp; /* outside temperature */
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132 int outside_humidity; /* humidity in percent */
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133 float outside_dewpoint; /* dewpoint temperature outside */
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134 float pressure; /* absolute pressure, hPa */
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135 float pressure_sea_level; /* relative sea level pressure, hPa */
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136 float page1_abs_pressure; /* absolute pressure, hPa, from page 1 */
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137 float page1_rel_pressure; /* relative pressure, hPa, from page 1 */
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138 float wind_speed; /* wind speed in km/h */
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139 float wind_gust; /* wind gust speed in km/h */
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140 float wind_direction; /* wind direction, as angle */
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141 #define INVALID_DIRECTION 1024 /* set if we get invalid readings */
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142 char wind_direction_text [4]; /* wind direction, in text */
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143 /*
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144 * We keep two rain counters. rain is the current rainfall, incremented on
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145 * every reading. This is similar to, but not the same as, what the station
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146 * does internally. This field is only changed by the wh1080 program.
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147 *
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148 * The other field, 'previous_rain', is set to 'rain' by the report program
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149 * after reporting the rainfall. It is only changed by report. This approach
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150 * avoids any kind of locking.
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151 */
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152 float rain; /* rainfall in mm */
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153 float previous_rain; /* previous rainfall in mm */
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154 };
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155
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156 extern struct readings current_readings;
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157
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158 struct sharefile
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159 {
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160 #define SHARED_MAGIC 0x539
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161 int magic; /* magic number */
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162 struct readings current_readings; /* current readings */
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163 };
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164
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165 extern struct sharefile *sharefile; /* file to map */
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166 extern int sharefd; /* and descriptor */
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167 extern float print_previous_rain;
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168
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169 /* MySQL stuff, in db.c */
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170 extern MYSQL *mysql;
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171 extern MYSQL_RES *mysql_result;
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172 extern MYSQL_ROW mysql_row;
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173 extern char mysql_querytext [1024]; /* build up queries here */
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174 extern char *wind_directions []; /* in util.c */
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175
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176 /* in db.c */
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177 void db_login ();
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178 int doquery (char *query);
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179 int domyquery (char *query, MYSQL_RES **result);
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180 char *mycopy (char *);
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181 int read_config (int argc, char *argv []);
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182
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183 void print_readings (struct readings *readings);
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184 float dewpoint (float temp, int humidity);
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185 void set_dewpoints (struct readings *readings);
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186 void set_sea_level_pressure (struct readings *readings);
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187 void datetext (time_t, char *, char *);