1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
|
function [w, initialcross, finalcross, midreference]=pulsewidth(x, varargin)
// This function estimate pulse width of real vector X.
// Calling Sequence
// w=pulsewidth(x)
// w=pulsewidth(x, Fs)
// w=pulsewidth(x, t)
// w=pulsewidth (x, t, 'Polarity', pol)
// w=pulsewidth(x, t, 'MidPercentReferenceLevel', N )
// w=pulsewidth(x, t, 'Tolerance', M)
// w=pulsewidth(x, t,'StateLevels', O)
// [w initialcross finalcross midreference]=pulsewidth(x)
// [w initialcross finalcross midreference]=pulsewidth(x, Fs)
// [w initialcross finalcross midreference]=pulsewidth(x, t)
// [w initialcross finalcross midreference]=pulsewidth(x, t, 'Polarity', pol)
// [w initialcross finalcross midreference]=pulsewidth(x, t, 'MidPercentReferenceLevel', N )
// [w initialcross finalcross midreference]= pulsewidth(x, t, 'Tolerance', M)
// [w initialcross finalcross midreference]= pulsewidth(x, t,'StateLevels', O)
// [w initialcross finalcross midreference]= pulsewidth(x, t,'StateLevels', O, 'fig', on or off)
//
// Parameters
// x: real vector.
// Fs: specifies the sample rate, Fs, as a positive scalar, where the first sample instant corresponds to a time of zero.
// t: defiene instant sample time t as vector with same length of x, or specifies the sample rate, t, as a positive scalar.
// Polarity: specify the polarity of the pulse as either 'positive' or 'negative', where the default value is 'positive'.
// MidPercentReferenceLevel: specify the mid percent reference leves as a percentage, default value of N is 50.
// Tolerance: define the tolerance value as real scaler value, where default value of M is 2.0.
// StateLevels: define the lower and upper state levels as two element real vector.
// fig: specify the logical input value to display figure as one of 'on' or 'off', where the default input in 'off'.
// w: returns a vector of difference between the mid-crossings of the initial and final transitions of each positive-polarity pulse found in the input signal.
// initialcross: returns a vector of initial cross values of bilevel waveform transitions X.
// finalcross: returns a vector of final cross values of bilevel waveform transitions X.
// midreference: return mid reference value corrosponding to mid percenr reference value.
// Examples
//x = fscanfMat("macros/pulsedata_x.txt");
//t = fscanfMat("macros/pulsedata_t.txt");
//clf
//p = pulsewidth(x,t,'fig','ON')
//Output
// p =
//
// 0.1501572
// it also generates a pulse with pulse width and annotations
// See also
// Authors
// Jitendra Singh
// run statelevels and midcross function before running risetime function.
if or(type(x)==10) then
error ('Input arguments must be double.')
end
if length(varargin)==0 then
varargin=varargin;
end
sindex=[];
if length(varargin)>=1 then
a=1;
for i=1:length(varargin)
if type(varargin(i))==10 then
sindex(a)=i;
a=a+1;
end
end
end
pol='POSITIVE';
polidx=[];
fig='OFF'
index_on=[];
if (~isempty(sindex)) then
for j=1:length(sindex)
select convstr(varargin(sindex(j)), 'u') // validating input variable names
case {'STATELEVELS'}
if length(varargin) <=sindex(j) then
error(strcat(['parameter StateLevels required a value']));
end
if type(varargin(sindex(j)+1))==1 then
levels=varargin(sindex(j)+1);
elseif type(varargin(sindex(j)+1))==10 & convstr(varargin(sindex(j)+1), 'u')=='MIDPERCENTREFERENCELEVEL' | convstr(varargin(sindex(j)+1),'u')== 'TOLERANCE' | convstr(varargin(sindex(j)+1), 'u')=='FIG' | convstr(varargin(sindex(j)+1), 'u')=='POLARITY' then
error('parameter StateLevels required a value.')
elseif type(varargin(sindex(j)+1))==10 then
error('Expected STATELEVELS to be one of these types: double, Instead its type was char.')
end
case {'MIDPERCENTREFERENCELEVEL'}
if length(varargin) <=sindex(j) then
error(strcat(['parameter MidPercentRefernceLevel required a value.']));
end
if type(varargin(sindex(j)+1))==1 then
midpercentval= varargin(sindex(j)+1);
elseif type(varargin(sindex(j)+1))==10 & convstr(varargin(sindex(j)+1), 'u')=='STATELEVELS' | convstr(varargin(sindex(j)+1),'u')== 'TOLERANCE' | convstr(varargin(sindex(j)+1), 'u')=='FIG' | convstr(varargin(sindex(j)+1), 'u')=='POLARITY' then
error('parameter MidPercentRefernceLevel required a value.')
elseif type(varargin(sindex(j)+1))==10 then
error('Expected MidPercentRefernceLevel to be one of these types: double, Instead its type was char.')
end
case {'TOLERANCE'}
if length(varargin) <=sindex(j) then
error(strcat(["parameter Tolerance required a value"]));
elseif type(varargin(sindex(j)+1))==1 then
tolerance= varargin(sindex(j)+1);
elseif type(varargin(sindex(j)+1))==10 & convstr(varargin(sindex(j)+1), 'u')== 'STATELEVELS' | convstr(varargin(sindex(j)+1), 'u')== 'MIDPERCENTREFERENCELEVEL' | convstr(varargin(sindex(j)+1), 'u')=='FIG' | convstr(varargin(sindex(j)+1), 'u')=='POLARITY' then
error('parameter Tolerance required a value.');
elseif type(varargin(sindex(j)+1))==10 then
error('Expected Tolerance to be one of these types: double, Instead its type was char.');
end
case {'FIG'}
if length(varargin) <=sindex(j) then
error(strcat(['parameter fig required a value.']));
end
if type(varargin(sindex(j)+1))==1 then
error ('Expected fig to match one of these strings: on or off');
elseif type(varargin(sindex(j)+1))==10 & convstr(varargin(sindex(j)+1), 'u')=='STATELEVELS' | convstr(varargin(sindex(j)+1), 'u')== 'TOLERANCE' | convstr(varargin(sindex(j)+1), 'u')=='MIDPERCENTREFERENCELEVEL' | convstr(varargin(sindex(j)+1), 'u')=='POLARITY' then
error('parameter fig required a value.')
else
fig= convstr(varargin(sindex(j)+1), 'u');
end
if fig == 'OFF' | fig == 'ON' then
else
error('Expected fig to match one of these strings: on or off');
end
case{'ON'}
index_on=sindex(j)
if length(varargin) == 1 then
error ('Unexpected input.')
elseif type(varargin(sindex(j)-1))==1 then
error ('Unexpected input.');
elseif convstr(varargin(sindex(j)-1), 'u')~='FIG' then
error('Unexpected input');
end
case{'OFF'}
if length(varargin) == 1 then
error ('Unexpected input.')
elseif type(varargin(sindex(j)-1))==1 then
error ('Unexpected input.');
elseif convstr(varargin(sindex(j)-1), 'u')~='FIG' then
error('Unexpected input');
end
case{'POLARITY'}
if length(varargin)<=sindex(j) then
error ('Parameter polarity requires a value.')
end
if type( varargin(sindex(j)+1))==1 then
error ('POLARITY must be either ''Positive'' or ''Negative''.')
elseif type(varargin(sindex(j)+1))==10 & convstr(varargin(sindex(j)+1), 'u')== 'STATELEVELS' | convstr(varargin(sindex(j)+1), 'u')== 'MIDPERCENTREFERENCELEVEL' | convstr(varargin(sindex(j)+1), 'u')== 'TOLERANCE' | convstr(varargin(sindex(j)+1), 'u')=='FIG' then
error ('Parameter polarity requires a value.')
elseif convstr(varargin(sindex(j)+1), 'u') ~= 'POSITIVE' & convstr(varargin(sindex(j)+1), 'u')~= 'NEGATIVE' then
error ('POLARITY must be either ''Positive'' or ''Negative''.');
else
polidx=sindex(j);
end
case {'POSITIVE'}
if j==1 then
error(strcat(['Unexpected option:', " ", varargin(sindex(j))]));
elseif convstr(varargin(sindex(j)-1), 'u') ~= 'POLARITY'
error(strcat(['Unexpected option:', " ", varargin(sindex(j))]));
else
polinputidx= sindex(j);
pol= convstr(varargin (sindex(j)), 'u') ;
end
case {'NEGATIVE'}
if j==1 then
error(strcat(['Unexpected option:', " ", varargin(sindex(j))]));
elseif convstr(varargin(sindex(j)-1), 'u') ~= 'POLARITY'
error(strcat(['Unexpected option:', " ", varargin(sindex(j))]));
else
polinputidx= sindex(j);
pol= convstr(varargin (sindex(j)), 'u') ;
end
else
error(strcat(['Invalid optional argument'," ", varargin(sindex(j))]));
end // switch
end // for
end // if
//
if length(index_on)>0 then
varargin(index_on)='OFF';
end
if length(polidx)>0 then
varargin(polidx)=null();
varargin(polinputidx-1)=null();
end
[crossval midref levels t tolerance]= midcross(x, varargin(:));
upperbound= levels(2)- (tolerance/100)*(levels(2)-levels(1));
mostupperbound=levels(2)+ (tolerance/100)*(levels(2)-levels(1));
lowerbound= levels(1)+ (tolerance/100)*(levels(2)-levels(1));
mostlowerbound=levels(1)- (tolerance/100)*(levels(2)-levels(1));
int_pos=[];
final_pos=[];
int_neg=[];
final_neg=[];
if length(crossval)>=2 then
if x(1)>midref then
int_pos=crossval(2:2:$);
final_pos=crossval(3:2:$);
int_neg=crossval(1:2:$);
final_neg=crossval(2:2:$);
else
int_pos=crossval(1:2:$);
final_pos=crossval(2:2:$);
int_neg=crossval(2:2:$);
final_neg=crossval(3:2:$);
end
if length(int_pos)>length(final_pos) then
int_pos=int_pos(1:($-1))
elseif length(int_neg)>length(final_neg) then
int_neg=int_neg(1:($-1))
end
end
//////////////////////////////////////////////////////////////////////////////////////////
w=[];
if pol=='POSITIVE' then
w=final_pos-int_pos;
initialcross=int_pos;
finalcross=final_pos;
else
w=final_neg-int_neg;
initialcross=int_neg;
finalcross=final_neg;
end
midreference=midref; // return midreference value
if fig=='ON' then // if the defined output is only 1, the it will provide the graphical representation of //levels
if length(w)==0 then
plot(t,x, 'LineWidth',1, 'color', 'black')
// xtitle('', 'Time (second)','Level (Volts)' );
plot(t,midreference * ones(1, length(t)),'-r', 'LineWidth',0.5)
plot(t,mostupperbound * ones(1, length(t)),'--r', 'LineWidth',0.5)
plot(t,levels(2) * ones(1, length(t)),'--k', 'LineWidth',0.5)
plot(t,upperbound * ones(1, length(t)),'--r', 'LineWidth',0.5)
plot(t,lowerbound *ones(1, length(t)),'--g', 'LineWidth',0.5)
plot(t,levels(1) * ones(1, length(t)),'--k', 'LineWidth',0.5)
plot(t,mostlowerbound * ones(1, length(t)),'--g', 'LineWidth',0.5)
xlabel("Time (second)", "fontsize",3, "color", "black" )
ylabel("Level (Volts)", "fontsize",3, "color", "black" )
legends(["Signal"; "upper boundary"; "upper state"; "lower boundary"; "mid reference"; "upper boundary"; "lower state"; "lower boundary"], [[1;1], [5;2], [1;2], [5;2], [5;1], [3;2], [1;2], [3;2]], opt='?')
else
plot(t,x, 'LineWidth',1, 'color', 'black')
plot(t,midreference * ones(1, length(t)),'-g', 'LineWidth',0.5)
rects=[initialcross; levels(2)*ones(w); w; (levels(2)-levels(1))*ones(w)]
col=-10*ones(w);
midc=[initialcross, finalcross];
midcross=gsort(midc, 'c','i' )
plot(midcross, midreference*ones(midcross), "r*", 'MarkerSize',15);
plot(t,mostupperbound * ones(1, length(t)),'--r', 'LineWidth',0.5)
plot(t,levels(2) * ones(1, length(t)),'--k', 'LineWidth',0.5)
plot(t,upperbound * ones(1, length(t)),'--r', 'LineWidth',0.5)
plot(t,midreference * ones(1, length(t)),'-r', 'LineWidth',0.5)
plot(t,lowerbound *ones(1, length(t)),'--g', 'LineWidth',0.5)
plot(t,levels(1) * ones(1, length(t)),'--k', 'LineWidth',0.5)
plot(t,mostlowerbound * ones(1, length(t)),'--g', 'LineWidth',0.5)
xrects(rects, col);
xlabel("Time (second)", "fontsize",3, "color", "black" )
ylabel("Level (Volts)", "fontsize",3, "color", "black" )
legends(["pulsewidth"; "Signal"; "mid cross"; "upper boundary"; "upper state"; "lower boundary"; "mid reference"; "upper boundary"; "lower state"; "lower boundary"], [[-11; 2] , [1;1], [-10;3], [5;2], [1;2], [5;2], [5;1], [3;2],[1;2], [3;2]], 1)
end
end
//
//
endfunction
|
