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annotate Allan.c @ 254:67c8ace9d5f6
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| author | Daniele Nicolodi <daniele@grinta.net> |
|---|---|
| date | Fri, 05 Jun 2015 18:06:12 +0200 |
| parents | ddc8c47db3df |
| children |
| rev | line source |
|---|---|
| 0 | 1 #include <ansi_c.h> |
| 2 #include <userint.h> | |
| 3 | |
| 144 | 4 #include "utils.h" |
| 135 | 5 #include "FXAllan.h" |
| 6 #include "Allan.h" | |
| 0 | 7 |
| 135 | 8 #define DATAPOINT_COLOR VAL_RED |
| 9 #define ERRORBAR_COLOR VAL_RED | |
| 0 | 10 |
| 11 | |
| 135 | 12 static void Allan_Reset(Allan_Data * Instance); |
| 13 static void Allan_Display(Allan_Data * Instance); | |
| 14 | |
| 0 | 15 |
| 135 | 16 void Allan_InitPanel(Allan_Data * Instance, const char *title, double normalization, int parent, int control) |
| 17 { | |
| 18 if ((Instance->AllanPanel = LoadPanel (0, "FXAllan.uir", ALLANPANEL)) < 0) | |
| 19 return; | |
| 0 | 20 |
| 135 | 21 Allan_Reset(Instance); |
| 22 Instance->normalization = normalization; | |
| 23 Instance->autoscale = FALSE; | |
|
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24 Instance->active = TRUE; |
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25 Instance->parent = parent; |
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26 Instance->control = control; |
| 135 | 27 |
| 28 SetPanelAttribute(Instance->AllanPanel, ATTR_TITLE, title); | |
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29 SetPanelAttribute(Instance->AllanPanel, ATTR_CALLBACK_DATA, (void *)Instance); |
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30 DisplayPanel(Instance->AllanPanel); |
| 135 | 31 SetCtrlVal(Instance->AllanPanel, ALLANPANEL_NORMALIZER, normalization); |
| 32 } | |
| 33 | |
| 34 | |
| 35 void Allan_ClosePanel(Allan_Data * Instance) | |
| 36 { | |
| 37 Instance->active = FALSE; | |
| 38 SetCtrlVal(Instance->parent, Instance->control, FALSE); | |
| 138 | 39 DiscardPanel(Instance->AllanPanel); |
| 135 | 40 } |
| 0 | 41 |
| 42 | |
| 135 | 43 void Allan_AddFrequency(Allan_Data * Instance, double Freq) |
| 44 { | |
| 45 /* total number of points used. used to calculate the drift rate */ | |
| 46 int N = 1 + Instance->BlocksNumber[0]; | |
| 47 double Mean = Instance->Mean; | |
| 48 double Drift = Instance->Drift; | |
| 49 | |
| 50 /* compute drift rate */ | |
| 136 | 51 if (N > 1) |
| 135 | 52 Instance->Drift = (Drift * (N - 2) + 6 * (Freq - Mean) / N) / (N + 1); |
| 53 Instance->Mean = (Mean * (N - 1) + Freq) / N; | |
| 54 | |
| 55 /* compute allan deviation */ | |
| 136 | 56 for (int i = 0; i < ALLAN_NUM_DATAPOINTS; i++) { |
| 135 | 57 Instance->CurrentAverage[i] = (Instance->CurrentAverage[i]*Instance->NbCurrentAverage[i] + Freq) |
| 58 /(Instance->NbCurrentAverage[i]+1); | |
| 59 Instance->NbCurrentAverage[i] +=1; | |
| 60 | |
| 61 if (Instance->NbCurrentAverage[i] >= pow(2,i) ) { | |
| 62 double CurrentMean = Instance->CurrentAverage[i]; | |
| 63 double LastMean = Instance->LastMean[i]; | |
| 64 N = Instance->BlocksNumber[i]; | |
| 65 N++; | |
| 66 Instance->CurrentAverage[i] = 0; | |
| 67 Instance->NbCurrentAverage[i] = 0; | |
| 68 if (N > 1) { | |
| 69 Instance->AllanVar[i] = (Instance->AllanVar[i]*(N-2) | |
| 70 +0.5*pow(CurrentMean-LastMean,2))/(N-1) ; | |
| 71 } | |
| 72 Instance->LastMean[i] = CurrentMean; | |
| 73 Instance->BlocksNumber[i] = N; | |
| 74 } | |
| 75 } | |
| 76 | |
| 77 Allan_Display(Instance); | |
| 78 } | |
| 0 | 79 |
| 135 | 80 |
| 81 /* private */ | |
| 82 | |
| 83 static void Allan_Reset(Allan_Data *Instance) | |
| 84 { | |
| 85 memset(Instance->AllanVar, 0, sizeof(Instance->AllanVar)); | |
| 86 memset(Instance->LastMean, 0, sizeof(Instance->LastMean)); | |
| 87 memset(Instance->BlocksNumber, 0, sizeof(Instance->BlocksNumber)); | |
| 88 memset(Instance->CurrentAverage, 0, sizeof(Instance->CurrentAverage)); | |
| 89 memset(Instance->NbCurrentAverage, 0, sizeof(Instance->NbCurrentAverage)); | |
| 90 Instance->Drift = 0; | |
| 91 Instance->Mean = 0; | |
| 92 } | |
| 0 | 93 |
| 94 | |
| 135 | 95 static void Allan_Display(Allan_Data *Instance) |
| 96 { | |
| 138 | 97 double x[ALLAN_NUM_DATAPOINTS]; |
| 98 double y[ALLAN_NUM_DATAPOINTS]; | |
| 99 double error; | |
| 100 int dedrift; | |
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101 int i; |
| 135 | 102 |
| 103 GetCtrlVal(Instance->AllanPanel, ALLANPANEL_DEDRIFT, &dedrift); | |
| 136 | 104 SetCtrlVal(Instance->AllanPanel, ALLANPANEL_DRIFT, Instance->Drift); |
| 135 | 105 |
| 136 | 106 for (i = 0; i < ALLAN_NUM_DATAPOINTS; i++) { |
| 138 | 107 x[i] = pow(2, i); |
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108 |
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109 if (Instance->AllanVar[i] == 0.0) { |
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110 y[i] = 0.0; |
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111 continue; |
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112 } |
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113 |
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114 /* remove linear drift estimated contribution to the allan variance */ |
| 135 | 115 if (dedrift) { |
| 138 | 116 double corr = 0.5 * (Instance->Drift * x[i]) * (Instance->Drift * x[i]); |
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117 /* uncertainty in the estimate of the drift rate may over correct |
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118 the estimated allan variance and result in a negative value. in |
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119 this case we take the absolute value of the corrected value as |
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120 the best estimator of the allan variance */ |
| 138 | 121 y[i] = sqrt(fabs(Instance->AllanVar[i] - corr)) / Instance->normalization; |
| 135 | 122 } else { |
| 138 | 123 y[i] = sqrt(Instance->AllanVar[i]) / Instance->normalization; |
| 135 | 124 } |
| 125 } | |
| 126 | |
| 127 DeleteGraphPlot(Instance->AllanPanel, ALLANPANEL_ALLANPLOT, -1, VAL_IMMEDIATE_DRAW); | |
| 138 | 128 PlotXY(Instance->AllanPanel, ALLANPANEL_ALLANPLOT, x, y, ALLAN_NUM_DATAPOINTS, |
| 135 | 129 VAL_DOUBLE, VAL_DOUBLE, VAL_SCATTER, VAL_SOLID_SQUARE, VAL_SOLID, 1, DATAPOINT_COLOR); |
| 130 | |
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131 for (i = 0; (i < ALLAN_NUM_DATAPOINTS) & (Instance->BlocksNumber[i] > 0); i++) { |
| 138 | 132 error = 1 / sqrt(Instance->BlocksNumber[i]); |
| 133 PlotLine(Instance->AllanPanel, ALLANPANEL_ALLANPLOT, | |
| 134 x[i], y[i] * (1 - error), x[i], y[i] * (1 + error), ERRORBAR_COLOR); | |
| 135 | 135 } |
| 136 } | |
| 0 | 137 |
| 138 | |
| 135 | 139 /* callbacks */ |
| 0 | 140 |
| 141 int CVICALLBACK Allan_CB_Reset(int panel, int control, int event, | |
| 142 void *callbackData, int eventData1, int eventData2) | |
| 143 { | |
| 135 | 144 switch(event) |
| 145 { | |
| 0 | 146 case EVENT_COMMIT: |
| 135 | 147 Allan_Data *data; |
| 148 GetPanelAttribute(panel, ATTR_CALLBACK_DATA, &data); | |
| 149 Allan_Reset(data); | |
| 0 | 150 break; |
| 135 | 151 } |
| 0 | 152 return 0; |
| 153 } | |
| 154 | |
| 135 | 155 |
| 156 int CVICALLBACK Allan_CB_ChangeYLim (int panel, int control, int event, | |
| 0 | 157 void *callbackData, int eventData1, int eventData2) |
| 135 | 158 { |
| 0 | 159 switch (event) |
| 135 | 160 { |
| 0 | 161 case EVENT_COMMIT: |
| 136 | 162 int pmin, pmax; |
| 163 GetCtrlVal(panel, ALLANPANEL_MIN, &pmin); | |
| 164 GetCtrlVal(panel, ALLANPANEL_MAX, &pmax); | |
| 165 if (pmin < pmax) { | |
| 166 SetAxisScalingMode(panel, ALLANPANEL_ALLANPLOT, VAL_LEFT_YAXIS, VAL_MANUAL, pow(10, pmin), pow(10, pmax)); | |
| 167 SetCtrlVal(panel, ALLANPANEL_CHECKBOX_AUTOSCALE, FALSE); | |
| 135 | 168 } |
| 0 | 169 break; |
| 135 | 170 } |
| 0 | 171 return 0; |
| 172 } | |
| 173 | |
| 174 | |
| 175 int CVICALLBACK Allan_CB_ChangeAutoScale (int panel, int control, int event, | |
| 176 void *callbackData, int eventData1, int eventData2) | |
| 177 { | |
| 178 switch (event) | |
| 135 | 179 { |
| 0 | 180 case EVENT_COMMIT: |
| 135 | 181 Allan_Data *data; |
| 182 GetPanelAttribute(panel, ATTR_CALLBACK_DATA, &data); | |
| 136 | 183 GetCtrlVal(panel, control, &(data->autoscale)); |
| 135 | 184 Allan_Display(data); |
| 0 | 185 break; |
| 135 | 186 } |
| 0 | 187 return 0; |
| 188 } | |
| 189 | |
| 190 | |
| 135 | 191 int CVICALLBACK Allan_CB_ChangeNormalization (int panel, int control, int event, |
| 192 void *callbackData, int eventData1, int eventData2) | |
| 193 { | |
| 194 switch (event) | |
| 195 { | |
| 196 case EVENT_COMMIT: | |
| 197 Allan_Data *data; | |
| 198 GetPanelAttribute(panel, ATTR_CALLBACK_DATA, &data); | |
| 199 GetCtrlVal(panel, control, &(data->normalization)); | |
| 200 Allan_Display(data); | |
| 201 break; | |
| 0 | 202 } |
| 135 | 203 return 0; |
| 204 } | |
| 0 | 205 |
| 206 | |
| 207 int CVICALLBACK CB_GeneralAllanPanel (int panel, int event, void *callbackData, | |
| 208 int eventData1, int eventData2) | |
| 209 { | |
| 210 switch (event) | |
| 135 | 211 { |
| 212 case EVENT_CLOSE: | |
| 213 Allan_Data *data; | |
| 214 GetPanelAttribute(panel, ATTR_CALLBACK_DATA, &data); | |
| 215 Allan_ClosePanel(data); | |
| 0 | 216 break; |
| 135 | 217 } |
| 0 | 218 return 0; |
| 219 } |