annotate KKFX80E.c @ 102:4f1f353e84f5

Add timeout to FX_Recv() function. Improve error handling in KKDataProvider
author Daniele Nicolodi <daniele.nicolodi@obspm.fr>
date Mon, 08 Apr 2013 16:18:05 +0200
parents c9e4f63c2033
children 3427013e4f70
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c9e4f63c2033 Implement data acquisition through direct communication with the KK counter
Daniele Nicolodi <daniele.nicolodi@obspm.fr>
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1 #include <ctype.h>
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2 #include <windows.h>
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3 #include <utility.h>
4f1f353e84f5 Add timeout to FX_Recv() function. Improve error handling in KKDataProvider
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4 #include <ansi_c.h>
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5
89
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6
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7 int (_stdcall *FX_OpenPort)(char **Port) = NULL;
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8 void (_stdcall *FX_ClosePort)(void) = NULL;
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9 int (_stdcall *FX_SendCommand)(char **Command) = NULL;
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10 int (_stdcall *FX_GetReport)(char **Data) = NULL;
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11 void (_stdcall *FX_Debug)(BOOL DbgFlag) = NULL;
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12 // int (_stdcall *GetFXM)(char **Data) = NULL;
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13 // void (_stdcall *Log)(int DbgNum) = NULL;
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14 // int (_stdcall *ReadMonitor)(char **Data) = NULL;
c9e4f63c2033 Implement data acquisition through direct communication with the KK counter
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15 // BOOL (_stdcall *EnumeratePorts)(char **PortName, char *PortNamePrefix) = NULL;
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16
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17 static HMODULE module;
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18 static char *errormsg;
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19
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20
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21 char * FX_Error(void)
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22 {
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23 return errormsg;
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24 }
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25
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26
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27 int FX_Init(void)
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28 {
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29 FARPROC funcp = NULL;
4f1f353e84f5 Add timeout to FX_Recv() function. Improve error handling in KKDataProvider
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30 errormsg = "";
89
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31
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32 module = LoadLibrary("KK_FX80E.dll");
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33 if (! module)
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34 return 0;
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35
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36 funcp = GetProcAddress(module, "FX_OpenPort");
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37 if (! funcp)
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38 goto error;
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39 FX_OpenPort = (void *)funcp;
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40
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41 funcp = GetProcAddress(module, "FX_ClosePort");
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42 if (! funcp)
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43 goto error;
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44 FX_ClosePort = (void *)funcp;
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45
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46 funcp = GetProcAddress(module, "FX_SendCommand");
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47 if (! funcp)
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48 goto error;
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49 FX_SendCommand = (void *)funcp;
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50
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51 funcp = GetProcAddress(module, "FX_GetReport");
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52 if (! funcp)
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53 goto error;
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54 FX_GetReport = (void *)funcp;
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55
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56 funcp = GetProcAddress(module, "FX_Debug");
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57 if (! funcp)
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58 goto error;
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59 FX_Debug = (void *)funcp;
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60
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61 return 1;
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62
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63 error:
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64 FreeLibrary(module);
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65 return 0;
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66 }
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67
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68
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69 void FX_Free(void)
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70 {
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71 FreeLibrary(module);
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72 }
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73
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74
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75 int FX_Open(char *port)
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76 {
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77 int rv = FX_OpenPort(&port);
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78 if (! rv)
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79 errormsg = port;
89
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80 return rv;
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81 }
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82
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83
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84 void FX_Close(void)
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85 {
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86 FX_ClosePort();
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87 }
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88
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89
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90 int FX_Send(char *cmd)
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91 {
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92 int rv = FX_SendCommand(&cmd);
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93 if (! rv)
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94 errormsg = cmd;
89
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95 return rv;
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96 }
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97
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98
102
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99 int FX_Recv(char **ret, int timeout)
89
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100 {
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101 int rv;
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102 char *data;
102
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103 double mark = Timer();
89
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104 do {
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105 data = ".";
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106 rv = FX_GetReport(&data);
102
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107 if ((Timer() - mark) > timeout) {
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108 rv = 0;
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109 data = "Function FX_Recv: Timeout";
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110 }
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111 } while ((! data) && (rv == 1));
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112
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113 if (! rv) {
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114 errormsg = data;
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115 data = NULL;
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116 }
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117
89
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118 if (ret)
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119 *ret = data;
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120
102
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121 return rv;
89
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122 }