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annotate file-data-provider.c @ 231:c10236b5a3e9

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author Daniele Nicolodi <daniele.nicolodi@obspm.fr>
date Mon, 27 Oct 2014 18:03:35 +0100
parents 4102fe614df2
children ec81395bf08d
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1 /* FXAnalise data provider reading data from KK data file on disc */
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2
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3 #include <userint.h>
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4 #include <ansi_c.h>
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5 #include <utility.h>
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6 #include <formatio.h>
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7
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8 #include "data-provider.h"
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9
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10 //#define LOGFILEPATH "C:\\Femto\\Software\\FXQE80"
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11 #define LOGFILEPATH "C:\\temp"
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12
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13
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14 int CVICALLBACK FileDataProvider (void *functionData)
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15 {
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16 int mainThreadId;
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17 char dataFileName[MAX_PATHNAME_LEN];
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18 int fd;
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19 int read;
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20 int year, month, day, hour, min, sec, msec;
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21 struct tm t;
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22 char line[1024];
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23 struct event event;
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24 double now;
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25
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26 /* get main thread id to post messages to it */
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27 mainThreadId = CmtGetMainThreadID();
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28
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29 /* guess current data log file name */
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30 GetCurrentDateTime(&now);
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31 GetDateTimeElements(now, NULL, NULL, NULL, &month, &day, &year);
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32 snprintf(dataFileName, sizeof(dataFileName) - 1,
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33 "%s\\%02d%02d%02d_Frequ.txt", LOGFILEPATH, year % 100, month, day);
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34
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35 /* open file */
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36 fd = OpenFile(dataFileName, VAL_READ_ONLY, VAL_OPEN_AS_IS, VAL_ASCII);
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37 if (fd < 0) {
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38 /* notify error to the main thread */
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39 SendMessage(mainThreadId, "error opening data file '%s'", dataFileName);
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40 }
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41
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42 /* seek to file end */
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43 SetFilePtr(fd, 0, 2);
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44
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45 while (acquiring) {
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46
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47 /* read one line from data file */
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48 read = ReadLine(fd, line, sizeof(line) - 1);
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49 if (read < 1) {
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50 Delay(0.05);
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51 continue;
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52 }
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53
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54 /* parse data */
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55 read = Scan(line, "%d[w2]%d[w2]%d[w2] %d[w2]%d[w2]%d[w2].%d %f %f %f %f",
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56 &year, &month, &day, &hour, &min, &sec, &msec,
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57 &event.data[0], &event.data[1], &event.data[2], &event.data[3]);
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58 if (read != 11) {
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59 /* notify error to the main thread */
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60 SendMessage(mainThreadId, "error parsing data log line");
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61 /* skip line */
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62 continue;
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63 }
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64
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65 t.tm_hour = hour;
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66 t.tm_min = min;
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67 t.tm_sec = sec;
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68 t.tm_mday = day;
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69 /* correct month count */
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70 t.tm_mon = month - 1;
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71 /* years since 1900 */
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72 t.tm_year = year + 2000 - 1900;
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73 /* deduce if daylight saving is in place from the date and time itself */
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74 t.tm_isdst = -1;
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76 /* convert into seconds since 1 January 1900 00:00:00 and add milliseconds */
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77 event.time.tv_sec = mktime(&t);
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78 event.time.tv_usec = msec * 1000;
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79
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80 /* convert from kHz to Hz */
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81 event.data[0] *= 1000.0;
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82 event.data[1] *= 1000.0;
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83 event.data[2] *= 1000.0;
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84 event.data[3] *= 1000.0;
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85
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86 /* push data into the data queue */
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87 CmtWriteTSQData(dataQueue, &event, 1, TSQ_INFINITE_TIMEOUT, 0);
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89 /* handle switch to next data file */
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90 if ((hour == 23) && (min == 59) && (sec == 59)) {
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91
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92 /* next data file name */
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93 snprintf(dataFileName, sizeof(dataFileName) - 1,
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94 "%s\\%02d%02d%02d_Frequ.txt", LOGFILEPATH, year, month, day + 1);
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95
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96 /* close data file */
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97 CloseFile(fd);
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98
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99 /* wait for new data file to appear */
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100 int retry = 20;
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101 while (retry--) {
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102 fd = OpenFile(dataFileName, VAL_READ_ONLY, VAL_OPEN_AS_IS, VAL_ASCII);
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103 if (fd != -1)
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104 break;
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105 Delay(0.01);
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106 }
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107 }
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108 }
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109 return 0;
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110 }