pv/view/logicsignal.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #include <extdef.h>
  22
  23 #include <math.h>
  24
  25 #include "logicsignal.h"
  26 #include "view.h"
  27
  28 #include "pv/sigsession.h"
  29 #include "pv/data/logic.h"
  30 #include "pv/data/logicsnapshot.h"
  31 #include "pv/view/view.h"
  32
  33 using namespace boost;
  34 using namespace std;
  35
  36 namespace pv {
  37 namespace view {
  38
  39 const float LogicSignal::Oversampling = 2.0f;
  40
  41 const QColor LogicSignal::EdgeColour(0x80, 0x80, 0x80);
  42 const QColor LogicSignal::HighColour(0x00, 0xC0, 0x00);
  43 const QColor LogicSignal::LowColour(0xC0, 0x00, 0x00);
  44
  45 const QColor LogicSignal::SignalColours[10] = {
  46         QColor(0x16, 0x19, 0x1A),       // Black
  47         QColor(0x8F, 0x52, 0x02),       // Brown
  48         QColor(0xCC, 0x00, 0x00),       // Red
  49         QColor(0xF5, 0x79, 0x00),       // Orange
  50         QColor(0xED, 0xD4, 0x00),       // Yellow
  51         QColor(0x73, 0xD2, 0x16),       // Green
  52         QColor(0x34, 0x65, 0xA4),       // Blue
  53         QColor(0x75, 0x50, 0x7B),       // Violet
  54         QColor(0x88, 0x8A, 0x85),       // Grey
  55         QColor(0xEE, 0xEE, 0xEC),       // White
  56 };
  57
  58 LogicSignal::LogicSignal(pv::SigSession &session, const sr_probe *const probe,
  59         shared_ptr<data::Logic> data) :
  60         Signal(session, probe),
  61         _data(data),
  62         _trigger_none(NULL),
  63         _trigger_rising(NULL),
  64         _trigger_high(NULL),
  65         _trigger_falling(NULL),
  66         _trigger_low(NULL),
  67         _trigger_change(NULL)
  68 {
  69         _colour = SignalColours[probe->index % countof(SignalColours)];
  70 }
  71
  72 LogicSignal::~LogicSignal()
  73 {
  74 }
  75
  76 boost::shared_ptr<pv::data::Logic> LogicSignal::data() const
  77 {
  78         return _data;
  79 }
  80
  81 void LogicSignal::paint_back(QPainter &p, int left, int right)
  82 {
  83         if (_probe->enabled)
  84                 paint_axis(p, get_y(), left, right);
  85 }
  86
  87 void LogicSignal::paint_mid(QPainter &p, int left, int right)
  88 {
  89         using pv::view::View;
  90
  91         QLineF *line;
  92
  93         vector< pair<int64_t, bool> > edges;
  94
  95         assert(_probe);
  96         assert(_data);
  97         assert(right >= left);
  98
  99         assert(_view);
 100         const int y = _v_offset - _view->v_offset();
 101
 102         const double scale = _view->scale();
 103         assert(scale > 0);
 104
 105         const double offset = _view->offset();
 106
 107         if (!_probe->enabled)
 108                 return;
 109
 110         const float high_offset = y - View::SignalHeight + 0.5f;
 111         const float low_offset = y + 0.5f;
 112
 113         const deque< shared_ptr<pv::data::LogicSnapshot> > &snapshots =
 114                 _data->get_snapshots();
 115         if (snapshots.empty())
 116                 return;
 117
 118         const shared_ptr<pv::data::LogicSnapshot> &snapshot =
 119                 snapshots.front();
 120
 121         double samplerate = _data->get_samplerate();
 122
 123         // Show sample rate as 1Hz when it is unknown
 124         if (samplerate == 0.0)
 125                 samplerate = 1.0;
 126
 127         const double pixels_offset = offset / scale;
 128         const double start_time = _data->get_start_time();
 129         const int64_t last_sample = snapshot->get_sample_count() - 1;
 130         const double samples_per_pixel = samplerate * scale;
 131         const double start = samplerate * (offset - start_time);
 132         const double end = start + samples_per_pixel * (right - left);
 133
 134         snapshot->get_subsampled_edges(edges,
 135                 min(max((int64_t)floor(start), (int64_t)0), last_sample),
 136                 min(max((int64_t)ceil(end), (int64_t)0), last_sample),
 137                 samples_per_pixel / Oversampling, _probe->index);
 138         assert(edges.size() >= 2);
 139
 140         // Paint the edges
 141         const unsigned int edge_count = edges.size() - 2;
 142         QLineF *const edge_lines = new QLineF[edge_count];
 143         line = edge_lines;
 144
 145         for (vector<pv::data::LogicSnapshot::EdgePair>::const_iterator i =
 146                         edges.begin() + 1;
 147                 i != edges.end() - 1; i++) {
 148                 const float x = ((*i).first / samples_per_pixel -
 149                         pixels_offset) + left;
 150                 *line++ = QLineF(x, high_offset, x, low_offset);
 151         }
 152
 153         p.setPen(EdgeColour);
 154         p.drawLines(edge_lines, edge_count);
 155         delete[] edge_lines;
 156
 157         // Paint the caps
 158         const unsigned int max_cap_line_count = (edges.size() - 1);
 159         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 160
 161         p.setPen(HighColour);
 162         paint_caps(p, cap_lines, edges, true, samples_per_pixel,
 163                 pixels_offset, left, high_offset);
 164         p.setPen(LowColour);
 165         paint_caps(p, cap_lines, edges, false, samples_per_pixel,
 166                 pixels_offset, left, low_offset);
 167
 168         delete[] cap_lines;
 169 }
 170
 171 void LogicSignal::paint_caps(QPainter &p, QLineF *const lines,
 172         vector< pair<int64_t, bool> > &edges, bool level,
 173         double samples_per_pixel, double pixels_offset, float x_offset,
 174         float y_offset)
 175 {
 176         QLineF *line = lines;
 177
 178         for (vector<pv::data::LogicSnapshot::EdgePair>::const_iterator i =
 179                 edges.begin(); i != (edges.end() - 1); i++)
 180                 if ((*i).second == level) {
 181                         *line++ = QLineF(
 182                                 ((*i).first / samples_per_pixel -
 183                                         pixels_offset) + x_offset, y_offset,
 184                                 ((*(i+1)).first / samples_per_pixel -
 185                                         pixels_offset) + x_offset, y_offset);
 186                 }
 187
 188         p.drawLines(lines, line - lines);
 189 }
 190
 191 void LogicSignal::update_trigger_actions()
 192 {
 193         const char cur_trigger = _probe->trigger ?
 194                 _probe->trigger[0] : '\0';
 195         _trigger_none->setChecked(cur_trigger == '\0');
 196         _trigger_rising->setChecked(cur_trigger == 'r');
 197         _trigger_high->setChecked(cur_trigger == '1');
 198         _trigger_falling->setChecked(cur_trigger == 'f');
 199         _trigger_low->setChecked(cur_trigger == '0');
 200         _trigger_change->setChecked(cur_trigger == 'c');
 201 }
 202
 203 void LogicSignal::set_trigger(char type)
 204 {
 205         const char trigger_type_string[2] = {type, 0};
 206         const char *const trigger_string =
 207                 (type != 0) ? trigger_type_string : NULL;
 208
 209         const sr_dev_inst *const sdi = _session.get_device();
 210         const int probe_count = g_slist_length(sdi->probes);
 211         assert(probe_count > 0);
 212
 213         assert(_probe && _probe->index < probe_count);
 214
 215         for (int i = 0; i < probe_count; i++) {
 216                 sr_dev_trigger_set(sdi, i, (i == _probe->index) ?
 217                         trigger_string : NULL);
 218         }
 219
 220         update_trigger_actions();
 221 }
 222
 223 void LogicSignal::on_trigger_none()
 224 {
 225         set_trigger('\0');
 226 }
 227
 228 void LogicSignal::on_trigger_rising()
 229 {
 230         set_trigger('r');
 231 }
 232
 233 void LogicSignal::on_trigger_high()
 234 {
 235         set_trigger('1');
 236 }
 237
 238 void LogicSignal::on_trigger_falling()
 239 {
 240         set_trigger('f');
 241 }
 242
 243 void LogicSignal::on_trigger_low()
 244 {
 245         set_trigger('0');
 246 }
 247
 248 void LogicSignal::on_trigger_change()
 249 {
 250         set_trigger('c');
 251 }
 252
 253 } // namespace view
 254 } // namespace pv