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annotate kk-data-provider.c @ 96:4a11331eacbf

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Ignore packet with id '7015' in KK driver
author Daniele Nicolodi <daniele.nicolodi@obspm.fr>
date Tue, 26 Mar 2013 18:17:18 +0100
parents b7ae2d947617
children 4f1f353e84f5
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c9e4f63c2033 Implement data acquisition through direct communication with the KK counter
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1 /* FXAnalise data provider which directly interfaces with the KK FX80E counter */
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2
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3 #include <ansi_c.h>
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4 #include <userint.h>
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5 #include <formatio.h>
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6 #include <utility.h>
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7 #include <inifile.h>
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8
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9 #include "data-provider.h"
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10 #include "KKFX80E.h"
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11
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12 #define CONFIGFILE "FXAnalise.ini"
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13 #define DEFAULTPORT "COM4:115200"
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14
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15 #define strneq(a, b, len) (strncmp((a), (b), (len)) == 0)
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16
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17 int CVICALLBACK KKDataProvider (void *functionData)
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18 {
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19 int mainThreadId;
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20 int rv;
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21 char *resp;
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22 struct event event;
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23 char port[256];
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24
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25 /* get main thread id to post messages to it */
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26 mainThreadId = CmtGetMainThreadID();
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27
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28 /* construct configuration file path */
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29 char pathname[MAX_PATHNAME_LEN];
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30 char project[MAX_PATHNAME_LEN];
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31 GetProjectDir(project);
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32 MakePathname(project, CONFIGFILE, pathname);
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33
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34 /* load configuration file */
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35 IniText configuration = Ini_New(TRUE);
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36 Ini_ReadFromFile(configuration, pathname);
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37
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38 /* get serial port name configuration */
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39 rv = Ini_GetStringIntoBuffer(configuration, "KK", "port", port, sizeof(port));
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40 if (rv == 0)
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41 strncpy(port, DEFAULTPORT, sizeof(port));
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42
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43 /* free */
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44 Ini_Dispose(configuration);
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45
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46 /* initialize library */
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47 FX_Init();
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48 /* connect to KK FX80E counter */
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49 rv = FX_Open(port);
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50
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51 /* clear transmit buffer */
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52 FX_Send("\x80");
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53 FX_Recv(&resp);
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54 /* set report interval 1sec */
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55 FX_Send("\x29");
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56 FX_Recv(&resp);
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57 /* read 4 channels */
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58 FX_Send("\x34");
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59 FX_Recv(&resp);
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60 /* set mode to instantaneous frequency measurement */
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61 FX_Send("\x42");
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62 FX_Recv(&resp);
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63 /* switch scrambler off */
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64 FX_Send("\x50");
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65 FX_Recv(&resp);
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66
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67 while (acquiring) {
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68 /* receive data from counter */
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69 FX_Recv(&resp);
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70
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71 if (strneq(resp, "2900;", 5)) {
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72
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73 /* timestamp */
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74 gettimeofday(&event.time, NULL);
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75
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76 /* parse received data */
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77 Scan(resp, "2900; %f; %f; %f; %f",
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78 &event.data[0], &event.data[1], &event.data[2], &event.data[3]);
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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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88
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89 } else if (strneq(resp, "7000;", 5)) {
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90 /* ignore heart beat packet */
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91 } else if (strneq(resp, "7015;", 5)) {
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92 /* ignore undocumented packet. it is sent by newer kk counters
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93 for each data packet. it contains a sample count along with
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94 other information */
89
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95 } else {
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96 /* send message to the main thread */
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97 SendMessage(mainThreadId, resp);
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98 }
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99 }
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100
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101 /* close serial port */
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102 FX_Close();
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103 /* free allocated resources */
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104 FX_Free();
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105
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106 return 0;
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107 }