├── .gitignore
├── .gitmodules
├── Config.cpp
├── Config.h
├── GridTransformer.cpp
├── GridTransformer.h
├── LICENSE
├── Makefile
├── README.md
├── display-test.cpp
├── glcdfont.c
├── glcdfont.h
├── matrix.cfg
└── rpi-fb-matrix.cpp


/.gitignore:
--------------------------------------------------------------------------------
 1 | display-test
 2 | rpi-fb-matrix
 3 | # Compiled Object files
 4 | *.slo
 5 | *.lo
 6 | *.o
 7 | *.obj
 8 | 
 9 | # Precompiled Headers
10 | *.gch
11 | *.pch
12 | 
13 | # Compiled Dynamic libraries
14 | *.so
15 | *.dylib
16 | *.dll
17 | 
18 | # Fortran module files
19 | *.mod
20 | 
21 | # Compiled Static libraries
22 | *.lai
23 | *.la
24 | *.a
25 | *.lib
26 | 
27 | # Executables
28 | *.exe
29 | *.out
30 | *.app
31 | 


--------------------------------------------------------------------------------
/.gitmodules:
--------------------------------------------------------------------------------
1 | [submodule "rpi-rgb-led-matrix"]
2 | 	path = rpi-rgb-led-matrix
3 | 	url = https://github.com/hzeller/rpi-rgb-led-matrix.git
4 | 


--------------------------------------------------------------------------------
/Config.cpp:
--------------------------------------------------------------------------------
  1 | // -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
  2 | // Matrix configuration parsing class implementation.
  3 | // Author: Tony DiCola
  4 | #include <sstream>
  5 | #include <stdexcept>
  6 | #include <vector>
  7 | #include <iostream>
  8 | #include <string>
  9 | 
 10 | #include <libconfig.h++>
 11 | 
 12 | #include "Config.h"
 13 | 
 14 | using namespace std;
 15 | 
 16 | // Get value if it exists, otherwise return default.
 17 | static int getWithDefault(const libconfig::Setting& root, const char *key,
 18 |                           int default_value) {
 19 |   return root.exists(key) ? root[key] : default_value;
 20 | }
 21 | 
 22 | Config::Config(rgb_matrix::RGBMatrix::Options *options,
 23 |                const string& filename)
 24 |   : _moptions(options),
 25 |     _display_width(-1),
 26 |     _display_height(-1),
 27 |     _panel_width(-1),
 28 |     _crop_x(-1),
 29 |     _crop_y(-1)
 30 | {
 31 |   try {
 32 |     // Load config file with libconfig.
 33 |     libconfig::Config cfg;
 34 |     cfg.readFile(filename.c_str());
 35 |     libconfig::Setting& root = cfg.getRoot();
 36 |     // Parse out the matrix configuration values. If not given, we use
 37 |     // reasonable defaults or defaults provided by the flags.
 38 |     _panel_width = getWithDefault(root, "panel_width", 32);
 39 |     _moptions->rows = getWithDefault(root, "panel_height", _moptions->rows);
 40 |     _chain_length = getWithDefault(root, "chain_length",
 41 |                                    _moptions->chain_length);
 42 |     // While all the code for the transformer assumes number of panels, for
 43 |     // the internal representation for the matrix code, we need to normalize
 44 |     // that to 32 wide panels.
 45 |     _moptions->chain_length = _chain_length * (_panel_width / 32);
 46 | 
 47 |     _moptions->parallel = getWithDefault(root, "parallel_count",
 48 |                                          _moptions->parallel);
 49 | 
 50 |     _display_width = getWithDefault(root, "display_width",
 51 |                                     getPanelWidth() * getChainLength());
 52 |     _display_height = getWithDefault(root, "display_height",
 53 |                                      getPanelHeight() * getParallelCount());
 54 | 
 55 |     // Load optional crop_origin value.
 56 |     if (root.exists("crop_origin")) {
 57 |       libconfig::Setting& crop_origin = root["crop_origin"];
 58 |       if (crop_origin.getLength() != 2) {
 59 |         throw invalid_argument("crop_origin must be a list with two values, the X and Y coordinates of the crop box origin!");
 60 |       }
 61 |       _crop_x = crop_origin[0];
 62 |       _crop_y = crop_origin[1];
 63 |     }
 64 | 
 65 |     // Do basic validation of configuration.
 66 |     if (_panel_width % 32 != 0) {
 67 |       throw invalid_argument("Panel width must be multiple of 32. Typically that is 32, but sometimes 64.");
 68 |     }
 69 | 
 70 |     if (_display_width % _panel_width != 0) {
 71 |       throw invalid_argument("display_width must be a multiple of panel_width!");
 72 |     }
 73 |     if (_display_height % getPanelHeight() != 0) {
 74 |       throw invalid_argument("display_height must be a multiple of panel_height!");
 75 |     }
 76 |     std::string message;
 77 |     if (!_moptions->Validate(&message)) {
 78 |       throw invalid_argument(message);
 79 |     }
 80 | 
 81 |     // Parse out the individual panel configurations.
 82 |     if (root.exists("panels")) {
 83 |       libconfig::Setting& panels_config = root["panels"];
 84 |       for (int i = 0; i < panels_config.getLength(); ++i) {
 85 |         libconfig::Setting& row = panels_config[i];
 86 |         for (int j = 0; j < row.getLength(); ++j) {
 87 |           GridTransformer::Panel panel;
 88 |           // Read panel order (required setting for each panel).
 89 |           panel.order = row[j]["order"];
 90 |           // Set default values for rotation and parallel chain, then override
 91 |           // them with any panel-specific configuration values.
 92 |           panel.rotate = 0;
 93 |           panel.parallel = 0;
 94 |           row[j].lookupValue("rotate", panel.rotate);
 95 |           row[j].lookupValue("parallel", panel.parallel);
 96 |           // Perform validation of panel values.
 97 |           // If panels are square allow rotations that are a multiple of 90, otherwise
 98 |           // only allow a rotation of 180 degrees.
 99 |           if ((_panel_width == getPanelHeight()) && (panel.rotate % 90 != 0)) {
100 |             stringstream error;
101 |             error << "Panel " << i << "," << j << " rotation must be a multiple of 90 degrees!";
102 |             throw invalid_argument(error.str());
103 |           }
104 |           else if ((_panel_width != getPanelHeight()) && (panel.rotate % 180 != 0)) {
105 |             stringstream error;
106 |             error << "Panel row " << j << ", column " << i << " can only be rotated 180 degrees!";
107 |             throw invalid_argument(error.str());
108 |           }
109 |           // Check that parallel is value between 0 and 2 (up to 3 parallel chains).
110 |           if ((panel.parallel < 0) || (panel.parallel > 2)) {
111 |             stringstream error;
112 |             error << "Panel row " << j << ", column " << i << " parallel value must be 0, 1, or 2!";
113 |             throw invalid_argument(error.str());
114 |           }
115 |           // Add the panel to the list of panel configurations.
116 |           _panels.push_back(panel);
117 |         }
118 |       }
119 |       // Check the number of configured panels matches the expected number
120 |       // of panels (# of panel columns * # of panel rows).
121 |       const int expected = (getDisplayWidth() / getPanelWidth())
122 |         * (getDisplayHeight() / getPanelHeight());
123 |       if (_panels.size() != (unsigned int)expected) {
124 |         stringstream error;
125 |         error << "Expected " << expected << " panels in configuration but found " << _panels.size() << "!";
126 |         throw invalid_argument(error.str());
127 |       }
128 |     }
129 |   }
130 |   catch (const libconfig::FileIOException& fioex) {
131 |       throw runtime_error("IO error while reading configuration file.  Does the file exist?");
132 |     }
133 |   catch (const libconfig::ParseException& pex) {
134 |       stringstream error;
135 |       error << "Config file error at " << pex.getFile() << ":" << pex.getLine()
136 |             << " - " << pex.getError();
137 |       throw invalid_argument(error.str());
138 |     }
139 |   catch (const libconfig::SettingNotFoundException& nfex) {
140 |       stringstream error;
141 |       error << "Expected to find setting: " << nfex.getPath();
142 |       throw invalid_argument(error.str());
143 |     }
144 |   catch (const libconfig::ConfigException& ex) {
145 |     throw runtime_error("Error loading configuration!");
146 |   }
147 | }
148 | 


--------------------------------------------------------------------------------
/Config.h:
--------------------------------------------------------------------------------
 1 | // -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
 2 | // Matrix configuration parsing class declaration.
 3 | // Author: Tony DiCola
 4 | #ifndef CONFIG_H
 5 | #define CONFIG_H
 6 | 
 7 | #include <string>
 8 | #include <vector>
 9 | 
10 | #include "GridTransformer.h"
11 | #include "led-matrix.h"
12 | 
13 | class Config {
14 | public:
15 |   Config(rgb_matrix::RGBMatrix::Options *options,
16 |          const std::string& filename);
17 | 
18 |   // Attribute accessors:
19 |   int getDisplayWidth() const {
20 |     return (_display_width < 0)
21 |       ? getPanelWidth() * getChainLength()
22 |       : _display_width;
23 |   }
24 |   int getDisplayHeight() const {
25 |     return (_display_height < 0)
26 |       ? getPanelHeight() * getParallelCount()
27 |       : _display_height;
28 |   }
29 |   int getPanelWidth() const {
30 |     return (_panel_width) < 0 ? 32 : _panel_width;
31 |   }
32 |   int getPanelHeight() const {
33 |     return _moptions->rows;
34 |   }
35 |   int getChainLength() const {
36 |     return _chain_length;
37 |   }
38 |   int getParallelCount() const {
39 |     return _moptions->parallel;
40 |   }
41 |   bool hasTransformer() const { return !_panels.empty(); }
42 |   GridTransformer getGridTransformer() const {
43 |     return GridTransformer(getDisplayWidth(), getDisplayHeight(),
44 |                            getPanelWidth(), getPanelHeight(),
45 |                            getChainLength(), _panels);
46 |   }
47 |   bool hasCropOrigin() const {
48 |     return (_crop_x > -1) && (_crop_y > -1);
49 |   }
50 |   int getCropX() const {
51 |     return _crop_x;
52 |   }
53 |   int getCropY() const {
54 |     return _crop_y;
55 |   }
56 | 
57 | private:
58 |   rgb_matrix::RGBMatrix::Options* const _moptions;
59 |   int _display_width,
60 |       _display_height,
61 |       _panel_width,
62 |       _chain_length,
63 |       _crop_x,
64 |       _crop_y;
65 |   std::vector<GridTransformer::Panel> _panels;
66 | };
67 | 
68 | #endif
69 | 


--------------------------------------------------------------------------------
/GridTransformer.cpp:
--------------------------------------------------------------------------------
 1 | // LED matrix library transformer to map a rectangular canvas onto a complex
 2 | // chain of matrices.
 3 | // Author: Tony DiCola
 4 | #include "GridTransformer.h"
 5 | 
 6 | using namespace rgb_matrix;
 7 | using namespace std;
 8 | 
 9 | GridTransformer::GridTransformer(int width, int height, int panel_width, int panel_height,
10 |                                  int chain_length, const std::vector<Panel>& panels):
11 |   _width(width),
12 |   _height(height),
13 |   _panel_width(panel_width),
14 |   _panel_height(panel_height),
15 |   _chain_length(chain_length),
16 |   _source(NULL),
17 |   _panels(panels)
18 | {
19 |   // Display width must be a multiple of the panel pixel column count.
20 |   assert(_width % _panel_width == 0);
21 |   // Display height must be a multiple of the panel pixel row count.
22 |   assert(_height % _panel_height == 0);
23 |   // Compute number of rows and columns of panels.
24 |   _rows = _height / _panel_height;
25 |   _cols = _width / _panel_width;
26 |   // Check panel definition list has exactly the expected number of panels.
27 |   assert((_rows * _cols) == (int)_panels.size());
28 | }
29 | 
30 | void GridTransformer::SetPixel(int x, int y, uint8_t red, uint8_t green, uint8_t blue) {
31 |   assert(_source != NULL);
32 |   if ((x < 0) || (y < 0) || (x >= _width) || (y >= _height)) {
33 |     return;
34 |   }
35 | 
36 |   // Figure out what row and column panel this pixel is within.
37 |   int row = y / _panel_height;
38 |   int col = x / _panel_width;
39 | 
40 |   // Get the panel information for this pixel.
41 |   Panel panel = _panels[_cols*row + col];
42 | 
43 |   // Compute location of the pixel within the panel.
44 |   x = x % _panel_width;
45 |   y = y % _panel_height;
46 | 
47 |   // Perform any panel rotation to the pixel.
48 |   // NOTE: 90 and 270 degree rotation only possible on 32 row (square) panels.
49 |   if (panel.rotate == 90) {
50 |     assert(_panel_height == _panel_width);
51 |     int old_x = x;
52 |     x = (_panel_height-1)-y;
53 |     y = old_x;
54 |   }
55 |   else if (panel.rotate == 180) {
56 |     x = (_panel_width-1)-x;
57 |     y = (_panel_height-1)-y;
58 |   }
59 |   else if (panel.rotate == 270) {
60 |     assert(_panel_height == _panel_width);
61 |     int old_y = y;
62 |     y = (_panel_width-1)-x;
63 |     x = old_y;
64 |   }
65 | 
66 |   // Determine x offset into the source panel based on its order along the chain.
67 |   // The order needs to be inverted because the matrix library starts with the
68 |   // origin of an image at the end of the chain and not at the start (where
69 |   // ordering begins for this transformer).
70 |   int x_offset = ((_chain_length-1)-panel.order)*_panel_width;
71 | 
72 |   // Determine y offset into the source panel based on its parrallel chain value.
73 |   int y_offset = panel.parallel*_panel_height;
74 | 
75 |   _source->SetPixel(x_offset + x,
76 |                     y_offset + y,
77 |                     red, green, blue);
78 | }
79 | 
80 | Canvas* GridTransformer::Transform(Canvas* source) {
81 |   assert(source != NULL);
82 |   int swidth = source->width();
83 |   int sheight = source->height();
84 |   assert((_width * _height) == (swidth * sheight));
85 |   _source = source;
86 |   return this;
87 | }
88 | 


--------------------------------------------------------------------------------
/GridTransformer.h:
--------------------------------------------------------------------------------
 1 | // LED matrix library transformer to map a rectangular canvas onto a complex
 2 | // chain of matrices.
 3 | // Author: Tony DiCola
 4 | #ifndef GRIDTRANSFORMER_H
 5 | #define GRIDTRANSFORMER_H
 6 | 
 7 | #include <cassert>
 8 | #include <vector>
 9 | 
10 | #include "led-matrix.h"
11 | 
12 | 
13 | class GridTransformer: public rgb_matrix::Canvas, public rgb_matrix::CanvasTransformer {
14 | public:
15 |   struct Panel {
16 |     int order;
17 |     int rotate;
18 |     int parallel;
19 |   };
20 | 
21 |   GridTransformer(int width, int height, int panel_width, int panel_height,
22 |                   int chain_length, const std::vector<Panel>& panels);
23 |   virtual ~GridTransformer() {}
24 | 
25 |   // Canvas interface implementation:
26 |   virtual int width() const {
27 |     return _width;
28 |   }
29 |   virtual int height() const {
30 |     return _height;
31 |   }
32 |   virtual void Clear() {
33 |     assert(_source != NULL);
34 |     _source->Clear();
35 |   }
36 |   virtual void Fill(uint8_t red, uint8_t green, uint8_t blue) {
37 |     assert(_source != NULL);
38 |     _source->Fill(red, green, blue);
39 |   }
40 |   virtual void SetPixel(int x, int y, uint8_t red, uint8_t green, uint8_t blue);
41 | 
42 |   // Transformer interface implementation:
43 |   virtual rgb_matrix::Canvas* Transform(rgb_matrix::Canvas* source);
44 | 
45 |   // Other attribute accessors.
46 |   int getRows() const {
47 |     return _rows;
48 |   }
49 |   int getColumns() const {
50 |     return _cols;
51 |   }
52 | 
53 | private:
54 |   int _width,
55 |       _height,
56 |       _panel_width,
57 |       _panel_height,
58 |       _chain_length,
59 |       _rows,
60 |       _cols;
61 |   rgb_matrix::Canvas* _source;
62 |   std::vector<Panel> _panels;
63 | };
64 | 
65 | #endif
66 | 


--------------------------------------------------------------------------------
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  2 |                        Version 2, June 1991
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209 | 
210 | If any portion of this section is held invalid or unenforceable under
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213 | circumstances.
214 | 
215 | It is not the purpose of this section to induce you to infringe any
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224 | impose that choice.
225 | 
226 | This section is intended to make thoroughly clear what is believed to
227 | be a consequence of the rest of this License.
228 | 
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230 | certain countries either by patents or by copyrighted interfaces, the
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232 | may add an explicit geographical distribution limitation excluding
233 | those countries, so that distribution is permitted only in or among
234 | countries not thus excluded.  In such case, this License incorporates
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236 | 
237 |   9. The Free Software Foundation may publish revised and/or new versions
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240 | address new problems or concerns.
241 | 
242 | Each version is given a distinguishing version number.  If the Program
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244 | later version", you have the option of following the terms and conditions
245 | either of that version or of any later version published by the Free
246 | Software Foundation.  If the Program does not specify a version number of
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248 | Foundation.
249 | 
250 |   10. If you wish to incorporate parts of the Program into other free
251 | programs whose distribution conditions are different, write to the author
252 | to ask for permission.  For software which is copyrighted by the Free
253 | Software Foundation, write to the Free Software Foundation; we sometimes
254 | make exceptions for this.  Our decision will be guided by the two goals
255 | of preserving the free status of all derivatives of our free software and
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257 | 
258 |                             NO WARRANTY
259 | 
260 |   11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
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270 |   12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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278 | POSSIBILITY OF SUCH DAMAGES.
279 | 
280 |                      END OF TERMS AND CONDITIONS
281 | 
282 |             How to Apply These Terms to Your New Programs
283 | 
284 |   If you develop a new program, and you want it to be of the greatest
285 | possible use to the public, the best way to achieve this is to make it
286 | free software which everyone can redistribute and change under these terms.
287 | 
288 |   To do so, attach the following notices to the program.  It is safest
289 | to attach them to the start of each source file to most effectively
290 | convey the exclusion of warranty; and each file should have at least
291 | the "copyright" line and a pointer to where the full notice is found.
292 | 
293 |     {description}
294 |     Copyright (C) {year}  {fullname}
295 | 
296 |     This program is free software; you can redistribute it and/or modify
297 |     it under the terms of the GNU General Public License as published by
298 |     the Free Software Foundation; either version 2 of the License, or
299 |     (at your option) any later version.
300 | 
301 |     This program is distributed in the hope that it will be useful,
302 |     but WITHOUT ANY WARRANTY; without even the implied warranty of
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304 |     GNU General Public License for more details.
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306 |     You should have received a copy of the GNU General Public License along
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308 |     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
309 | 
310 | Also add information on how to contact you by electronic and paper mail.
311 | 
312 | If the program is interactive, make it output a short notice like this
313 | when it starts in an interactive mode:
314 | 
315 |     Gnomovision version 69, Copyright (C) year name of author
316 |     Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
317 |     This is free software, and you are welcome to redistribute it
318 |     under certain conditions; type `show c' for details.
319 | 
320 | The hypothetical commands `show w' and `show c' should show the appropriate
321 | parts of the General Public License.  Of course, the commands you use may
322 | be called something other than `show w' and `show c'; they could even be
323 | mouse-clicks or menu items--whatever suits your program.
324 | 
325 | You should also get your employer (if you work as a programmer) or your
326 | school, if any, to sign a "copyright disclaimer" for the program, if
327 | necessary.  Here is a sample; alter the names:
328 | 
329 |   Yoyodyne, Inc., hereby disclaims all copyright interest in the program
330 |   `Gnomovision' (which makes passes at compilers) written by James Hacker.
331 | 
332 |   {signature of Ty Coon}, 1 April 1989
333 |   Ty Coon, President of Vice
334 | 
335 | This General Public License does not permit incorporating your program into
336 | proprietary programs.  If your program is a subroutine library, you may
337 | consider it more useful to permit linking proprietary applications with the
338 | library.  If this is what you want to do, use the GNU Lesser General
339 | Public License instead of this License.
340 | 
341 | 


--------------------------------------------------------------------------------
/Makefile:
--------------------------------------------------------------------------------
 1 | # Configure the rpi-rgb-led-matrix library here:
 2 | # The HARDWARE_DESC=adafruit-hat value configures the library to use the
 3 | # Adafruit LED matrix HAT wiring, and the -DRGB_SLOWDOWN_GPIO=1 value configures
 4 | # the library to work with a Raspberry Pi 2.  For a Pi 1 (or perhaps even on
 5 | # a Pi 2,  but I found it necessary in my testing) you can remove the
 6 | # -DRGB_SLOWDOWN_GPIO=1 option (You also can set this value at runtime via the
 7 | # command line option --led-slowdown-gpio=1).
 8 | # You can also add any other rpi-rgb-led-matrix library defines here
 9 | # to configure the library for more special needs.  See the library's docs for
10 | # details on options:
11 | #   https://github.com/hzeller/rpi-rgb-led-matrix/blob/master/lib/Makefile
12 | export HARDWARE_DESC=adafruit-hat
13 | export USER_DEFINES=-DRGB_SLOWDOWN_GPIO=1
14 | 
15 | # Configure compiler and libraries:
16 | CXX = g++
17 | CXXFLAGS = -Wall -std=c++11 -O3 -I. -I./rpi-rgb-led-matrix/include -I/opt/vc/include -I/opt/vc/include/interface/vcos/pthreads -I/opt/vc/include/interface/vmcs_host -I/opt/vc/include/interface/vmcs_host/linux -L./rpi-rgb-led-matrix/lib -L/opt/vc/lib
18 | LIBS = -lrgbmatrix -lrt -lm -lpthread -lbcm_host -lconfig++
19 | 
20 | # Makefile rules:
21 | all: rpi-fb-matrix display-test
22 | 
23 | rpi-fb-matrix: rpi-fb-matrix.o GridTransformer.o Config.o ./rpi-rgb-led-matrix/lib/librgbmatrix.a
24 | 	$(CXX) -o $@ $^ $(CXXFLAGS) $(LIBS)
25 | 
26 | display-test: display-test.o GridTransformer.o Config.o glcdfont.o ./rpi-rgb-led-matrix/lib/librgbmatrix.a
27 | 	$(CXX) -o $@ $^ $(CXXFLAGS) $(LIBS)
28 | 
29 | %.o: %.cpp $(DEPS)
30 | 	$(CXX) -c -o $@ $< $(CXXFLAGS)
31 | 
32 | ./rpi-rgb-led-matrix/lib/librgbmatrix.a:
33 | 	$(MAKE) -C ./rpi-rgb-led-matrix/lib
34 | 
35 | .PHONY: clean
36 | 
37 | clean:
38 | 	rm -f *.o rpi-fb-matrix display-test
39 | 	$(MAKE) -C ./rpi-rgb-led-matrix/lib clean
40 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # rpi-fb-matrix
 2 | Raspberry Pi framebuffer copy tool for RGB LED matrices.  Show what's on a Pi HDMI output on a big RGB LED matrix chain!
 3 | See the full guide with details on installation and configuration at: https://learn.adafruit.com/raspberry-pi-led-matrix-display/overview
 4 | 
 5 | ## Setup
 6 | 
 7 | You **must** clone this repository with the recursive option so that necessary
 8 | submodules are also cloned.  Run this command:
 9 | 
10 |     git clone --recursive https://github.com/adafruit/rpi-fb-matrix.git
11 | 
12 | Next you will need a few dependencies (libconfig++) to compile the code.  Run
13 | these commands to install the dependencies:
14 | 
15 |     sudo apt-get update
16 |     sudo apt-get install -y build-essential libconfig++-dev
17 | 
18 | Now if necessary you can change how the RGB LED matrix library is configured
19 | by editing the variables set in the Makefile.  By default the Makefile is
20 | configured to work with the Adafruit LED matrix HAT and a Raspberry Pi 2.  If
21 | you're using a different configuration open the Makefile and edit the `export DEFINES=...`
22 | line at the top.
23 | 
24 | Build the project by running make:
25 | 
26 |     make
27 | 
28 | Once compiled there will be two executables:
29 | 
30 | *   `rpi-fb-matrix`: The main program that will copy the contents of the primary
31 |     display (HDMI output) to attached LED matrices.
32 | *   `display-test`: A program to display the order and orientation of chained
33 |     together LED matrices.  Good for building complex display chains.
34 | 
35 | Both executables understand the standard command line flags provided in the
36 | rpi-rgb-led-matrix library, for instance for choosing the gpio mapping.
37 | The default compile-choice gpio mapping is `adafruit-hat`, but you can change
38 | that to any [supported gpio mapping] depending on your set-up.
39 | 
40 | The [configuration file](./matrix.cfg) allows to describe the geometry and
41 | panel-layout. It overrides geometry-related settings provided as flags
42 | (e.g. `--led-chain`).
43 | 
44 | You can get a list of available command line options by giving `--led-help`
45 | ```
46 | $ ./rpi-fb-matrix --led-help
47 | Usage: ./rpi-fb-matrix [flags] [config-file]
48 | Flags:
49 |         --led-gpio-mapping=<name> : Name of GPIO mapping used. Default "adafruit-hat"
50 |         --led-rows=<rows>         : Panel rows. 8, 16, 32 or 64. (Default: 32).
51 |         --led-chain=<chained>     : Number of daisy-chained panels. (Default: 1).
52 |         --led-parallel=<parallel> : For A/B+ models or RPi2,3b: parallel chains. range=1..3 (Default: 1).
53 |         --led-pwm-bits=<1..11>    : PWM bits (Default: 11).
54 |         --led-brightness=<percent>: Brightness in percent (Default: 100).
55 |         --led-scan-mode=<0..1>    : 0 = progressive; 1 = interlaced (Default: 0).
56 |         --led-show-refresh        : Show refresh rate.
57 |         --led-inverse             : Switch if your matrix has inverse colors on.
58 |         --led-rgb-sequence        : Switch if your matrix has led colors swapped (Default: "RGB")
59 |         --led-pwm-lsb-nanoseconds : PWM Nanoseconds for LSB (Default: 130)
60 |         --led-no-hardware-pulse   : Don't use hardware pin-pulse generation.
61 |         --led-slowdown-gpio=<0..2>: Slowdown GPIO. Needed for faster Pis and/or slower panels (Default: 1).
62 |         --led-daemon              : Make the process run in the background as daemon.
63 | ```
64 | 
65 | ## Acknowledgments
66 | 
67 | This program makes use of the following excellent libraries:
68 | 
69 | *   [rpi-rgb-led-matrix](https://github.com/hzeller/rpi-rgb-led-matrix)
70 | *   [libconfig](http://www.hyperrealm.com/libconfig/)
71 | 
72 | Framebuffer capture code based on information from the [rpi-fbcp](https://github.com/tasanakorn/rpi-fbcp) tool.
73 | 
74 | ## License
75 | 
76 | Released under the GPL v2.0 license, see LICENSE.txt for details.
77 | 
78 | [supported gpio mapping]: https://github.com/hzeller/rpi-rgb-led-matrix/blob/master/lib/Makefile#L19
79 | 


--------------------------------------------------------------------------------
/display-test.cpp:
--------------------------------------------------------------------------------
  1 | // -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
  2 | // Program to aid in the testing of LED matrix chains.
  3 | // Author: Tony DiCola
  4 | #include <cstdint>
  5 | #include <iostream>
  6 | #include <sstream>
  7 | #include <stdexcept>
  8 | 
  9 | #include <led-matrix.h>
 10 | #include <signal.h>
 11 | #include <unistd.h>
 12 | 
 13 | #include "Config.h"
 14 | #include "glcdfont.h"
 15 | #include "GridTransformer.h"
 16 | 
 17 | using namespace std;
 18 | using namespace rgb_matrix;
 19 | 
 20 | 
 21 | // Global to keep track of if the program should run.
 22 | // Will be set false by a SIGINT handler when ctrl-c is
 23 | // pressed, then the main loop will cleanly exit.
 24 | volatile bool running = true;
 25 | 
 26 | void printCanvas(Canvas* canvas, int x, int y, const string& message,
 27 |                  int r = 255, int g = 255, int b = 255) {
 28 |   // Loop through all the characters and print them starting at the provided
 29 |   // coordinates.
 30 |   for (auto c: message) {
 31 |     // Loop through each column of the character.
 32 |     for (int i=0; i<5; ++i) {
 33 |       unsigned char col = glcdfont[c*5+i];
 34 |       x += 1;
 35 |       // Loop through each row of the column.
 36 |       for (int j=0; j<8; ++j) {
 37 |         // Put a pixel for each 1 in the column byte.
 38 |         if ((col >> j) & 0x01) {
 39 |           canvas->SetPixel(x, y+j, r, g, b);
 40 |         }
 41 |       }
 42 |     }
 43 |     // Add a column of padding between characters.
 44 |     x += 1;
 45 |   }
 46 | }
 47 | 
 48 | static void sigintHandler(int s) {
 49 |   running = false;
 50 | }
 51 | 
 52 | static void usage(const char* progname) {
 53 |   std::cerr << "Usage: " << progname << " [flags] [config-file]" << std::endl;
 54 |   std::cerr << "Flags:" << std::endl;
 55 |   rgb_matrix::PrintMatrixFlags(stderr);
 56 | }
 57 | 
 58 | int main(int argc, char** argv) {
 59 |   try {
 60 |     // Initialize from flags.
 61 |     rgb_matrix::RGBMatrix::Options matrix_options;
 62 |     rgb_matrix::RuntimeOptions runtime_options;
 63 |     if (!rgb_matrix::ParseOptionsFromFlags(&argc, &argv,
 64 |                                            &matrix_options, &runtime_options)) {
 65 |       usage(argv[0]);
 66 |       return 1;
 67 |     }
 68 | 
 69 |     Config config(&matrix_options, argc >= 2 ? argv[1] : "/dev/null");
 70 |     cout << "Using config values: " << endl
 71 |          << " display_width: " << config.getDisplayWidth() << endl
 72 |          << " display_height: " << config.getDisplayHeight() << endl
 73 |          << " panel_width: " << config.getPanelWidth() << endl
 74 |          << " panel_height: " << config.getPanelHeight() << endl
 75 |          << " chain_length: " << config.getChainLength() << endl
 76 |          << " parallel_count: " << config.getParallelCount() << endl;
 77 | 
 78 |     // Initialize matrix library.
 79 |     // Create canvas and apply GridTransformer.
 80 |     RGBMatrix *canvas = CreateMatrixFromOptions(matrix_options, runtime_options);
 81 | 
 82 |     int panel_rows = config.getParallelCount();
 83 |     int panel_columns = config.getChainLength();
 84 |     if (config.hasTransformer()) {
 85 |       GridTransformer grid = config.getGridTransformer();
 86 |       canvas->ApplyStaticTransformer(grid);
 87 |       panel_rows = grid.getRows();
 88 |       panel_columns = grid.getColumns();
 89 |     }
 90 | 
 91 |     cout << " grid rows: " << panel_rows << endl
 92 |          << " grid cols: " << panel_columns << endl;
 93 | 
 94 |     // Clear the canvas, then draw on each panel.
 95 |     canvas->Fill(0, 0, 0);
 96 |     for (int j=0; j<panel_rows; ++j) {
 97 |       for (int i=0; i<panel_columns; ++i) {
 98 |         // Compute panel origin position.
 99 |         int x = i*config.getPanelWidth();
100 |         int y = j*config.getPanelHeight();
101 |         // Print the current grid position to the top left (origin) of the panel.
102 |         stringstream pos;
103 |         pos << i << "," << j;
104 |         printCanvas(canvas, x, y, pos.str());
105 |       }
106 |     }
107 |     // Loop forever waiting for Ctrl-C signal to quit.
108 |     signal(SIGINT, sigintHandler);
109 |     cout << "Press Ctrl-C to quit..." << endl;
110 |     while (running) {
111 |       sleep(1);
112 |     }
113 |     canvas->Clear();
114 |     delete canvas;
115 |   }
116 |   catch (const exception& ex) {
117 |     cerr << ex.what() << endl;
118 |     usage(argv[0]);
119 |     return -1;
120 |   }
121 |   return 0;
122 | }
123 | 


--------------------------------------------------------------------------------
/glcdfont.c:
--------------------------------------------------------------------------------
  1 | // Standard ASCII 5x7 font
  2 | const unsigned char glcdfont[] = {
  3 | 	0x00, 0x00, 0x00, 0x00, 0x00,
  4 | 	0x3E, 0x5B, 0x4F, 0x5B, 0x3E,
  5 | 	0x3E, 0x6B, 0x4F, 0x6B, 0x3E,
  6 | 	0x1C, 0x3E, 0x7C, 0x3E, 0x1C,
  7 | 	0x18, 0x3C, 0x7E, 0x3C, 0x18,
  8 | 	0x1C, 0x57, 0x7D, 0x57, 0x1C,
  9 | 	0x1C, 0x5E, 0x7F, 0x5E, 0x1C,
 10 | 	0x00, 0x18, 0x3C, 0x18, 0x00,
 11 | 	0xFF, 0xE7, 0xC3, 0xE7, 0xFF,
 12 | 	0x00, 0x18, 0x24, 0x18, 0x00,
 13 | 	0xFF, 0xE7, 0xDB, 0xE7, 0xFF,
 14 | 	0x30, 0x48, 0x3A, 0x06, 0x0E,
 15 | 	0x26, 0x29, 0x79, 0x29, 0x26,
 16 | 	0x40, 0x7F, 0x05, 0x05, 0x07,
 17 | 	0x40, 0x7F, 0x05, 0x25, 0x3F,
 18 | 	0x5A, 0x3C, 0xE7, 0x3C, 0x5A,
 19 | 	0x7F, 0x3E, 0x1C, 0x1C, 0x08,
 20 | 	0x08, 0x1C, 0x1C, 0x3E, 0x7F,
 21 | 	0x14, 0x22, 0x7F, 0x22, 0x14,
 22 | 	0x5F, 0x5F, 0x00, 0x5F, 0x5F,
 23 | 	0x06, 0x09, 0x7F, 0x01, 0x7F,
 24 | 	0x00, 0x66, 0x89, 0x95, 0x6A,
 25 | 	0x60, 0x60, 0x60, 0x60, 0x60,
 26 | 	0x94, 0xA2, 0xFF, 0xA2, 0x94,
 27 | 	0x08, 0x04, 0x7E, 0x04, 0x08,
 28 | 	0x10, 0x20, 0x7E, 0x20, 0x10,
 29 | 	0x08, 0x08, 0x2A, 0x1C, 0x08,
 30 | 	0x08, 0x1C, 0x2A, 0x08, 0x08,
 31 | 	0x1E, 0x10, 0x10, 0x10, 0x10,
 32 | 	0x0C, 0x1E, 0x0C, 0x1E, 0x0C,
 33 | 	0x30, 0x38, 0x3E, 0x38, 0x30,
 34 | 	0x06, 0x0E, 0x3E, 0x0E, 0x06,
 35 | 	0x00, 0x00, 0x00, 0x00, 0x00,
 36 | 	0x00, 0x00, 0x5F, 0x00, 0x00,
 37 | 	0x00, 0x07, 0x00, 0x07, 0x00,
 38 | 	0x14, 0x7F, 0x14, 0x7F, 0x14,
 39 | 	0x24, 0x2A, 0x7F, 0x2A, 0x12,
 40 | 	0x23, 0x13, 0x08, 0x64, 0x62,
 41 | 	0x36, 0x49, 0x56, 0x20, 0x50,
 42 | 	0x00, 0x08, 0x07, 0x03, 0x00,
 43 | 	0x00, 0x1C, 0x22, 0x41, 0x00,
 44 | 	0x00, 0x41, 0x22, 0x1C, 0x00,
 45 | 	0x2A, 0x1C, 0x7F, 0x1C, 0x2A,
 46 | 	0x08, 0x08, 0x3E, 0x08, 0x08,
 47 | 	0x00, 0x80, 0x70, 0x30, 0x00,
 48 | 	0x08, 0x08, 0x08, 0x08, 0x08,
 49 | 	0x00, 0x00, 0x60, 0x60, 0x00,
 50 | 	0x20, 0x10, 0x08, 0x04, 0x02,
 51 | 	0x3E, 0x51, 0x49, 0x45, 0x3E,
 52 | 	0x00, 0x42, 0x7F, 0x40, 0x00,
 53 | 	0x72, 0x49, 0x49, 0x49, 0x46,
 54 | 	0x21, 0x41, 0x49, 0x4D, 0x33,
 55 | 	0x18, 0x14, 0x12, 0x7F, 0x10,
 56 | 	0x27, 0x45, 0x45, 0x45, 0x39,
 57 | 	0x3C, 0x4A, 0x49, 0x49, 0x31,
 58 | 	0x41, 0x21, 0x11, 0x09, 0x07,
 59 | 	0x36, 0x49, 0x49, 0x49, 0x36,
 60 | 	0x46, 0x49, 0x49, 0x29, 0x1E,
 61 | 	0x00, 0x00, 0x14, 0x00, 0x00,
 62 | 	0x00, 0x40, 0x34, 0x00, 0x00,
 63 | 	0x00, 0x08, 0x14, 0x22, 0x41,
 64 | 	0x14, 0x14, 0x14, 0x14, 0x14,
 65 | 	0x00, 0x41, 0x22, 0x14, 0x08,
 66 | 	0x02, 0x01, 0x59, 0x09, 0x06,
 67 | 	0x3E, 0x41, 0x5D, 0x59, 0x4E,
 68 | 	0x7C, 0x12, 0x11, 0x12, 0x7C,
 69 | 	0x7F, 0x49, 0x49, 0x49, 0x36,
 70 | 	0x3E, 0x41, 0x41, 0x41, 0x22,
 71 | 	0x7F, 0x41, 0x41, 0x41, 0x3E,
 72 | 	0x7F, 0x49, 0x49, 0x49, 0x41,
 73 | 	0x7F, 0x09, 0x09, 0x09, 0x01,
 74 | 	0x3E, 0x41, 0x41, 0x51, 0x73,
 75 | 	0x7F, 0x08, 0x08, 0x08, 0x7F,
 76 | 	0x00, 0x41, 0x7F, 0x41, 0x00,
 77 | 	0x20, 0x40, 0x41, 0x3F, 0x01,
 78 | 	0x7F, 0x08, 0x14, 0x22, 0x41,
 79 | 	0x7F, 0x40, 0x40, 0x40, 0x40,
 80 | 	0x7F, 0x02, 0x1C, 0x02, 0x7F,
 81 | 	0x7F, 0x04, 0x08, 0x10, 0x7F,
 82 | 	0x3E, 0x41, 0x41, 0x41, 0x3E,
 83 | 	0x7F, 0x09, 0x09, 0x09, 0x06,
 84 | 	0x3E, 0x41, 0x51, 0x21, 0x5E,
 85 | 	0x7F, 0x09, 0x19, 0x29, 0x46,
 86 | 	0x26, 0x49, 0x49, 0x49, 0x32,
 87 | 	0x03, 0x01, 0x7F, 0x01, 0x03,
 88 | 	0x3F, 0x40, 0x40, 0x40, 0x3F,
 89 | 	0x1F, 0x20, 0x40, 0x20, 0x1F,
 90 | 	0x3F, 0x40, 0x38, 0x40, 0x3F,
 91 | 	0x63, 0x14, 0x08, 0x14, 0x63,
 92 | 	0x03, 0x04, 0x78, 0x04, 0x03,
 93 | 	0x61, 0x59, 0x49, 0x4D, 0x43,
 94 | 	0x00, 0x7F, 0x41, 0x41, 0x41,
 95 | 	0x02, 0x04, 0x08, 0x10, 0x20,
 96 | 	0x00, 0x41, 0x41, 0x41, 0x7F,
 97 | 	0x04, 0x02, 0x01, 0x02, 0x04,
 98 | 	0x40, 0x40, 0x40, 0x40, 0x40,
 99 | 	0x00, 0x03, 0x07, 0x08, 0x00,
100 | 	0x20, 0x54, 0x54, 0x78, 0x40,
101 | 	0x7F, 0x28, 0x44, 0x44, 0x38,
102 | 	0x38, 0x44, 0x44, 0x44, 0x28,
103 | 	0x38, 0x44, 0x44, 0x28, 0x7F,
104 | 	0x38, 0x54, 0x54, 0x54, 0x18,
105 | 	0x00, 0x08, 0x7E, 0x09, 0x02,
106 | 	0x18, 0xA4, 0xA4, 0x9C, 0x78,
107 | 	0x7F, 0x08, 0x04, 0x04, 0x78,
108 | 	0x00, 0x44, 0x7D, 0x40, 0x00,
109 | 	0x20, 0x40, 0x40, 0x3D, 0x00,
110 | 	0x7F, 0x10, 0x28, 0x44, 0x00,
111 | 	0x00, 0x41, 0x7F, 0x40, 0x00,
112 | 	0x7C, 0x04, 0x78, 0x04, 0x78,
113 | 	0x7C, 0x08, 0x04, 0x04, 0x78,
114 | 	0x38, 0x44, 0x44, 0x44, 0x38,
115 | 	0xFC, 0x18, 0x24, 0x24, 0x18,
116 | 	0x18, 0x24, 0x24, 0x18, 0xFC,
117 | 	0x7C, 0x08, 0x04, 0x04, 0x08,
118 | 	0x48, 0x54, 0x54, 0x54, 0x24,
119 | 	0x04, 0x04, 0x3F, 0x44, 0x24,
120 | 	0x3C, 0x40, 0x40, 0x20, 0x7C,
121 | 	0x1C, 0x20, 0x40, 0x20, 0x1C,
122 | 	0x3C, 0x40, 0x30, 0x40, 0x3C,
123 | 	0x44, 0x28, 0x10, 0x28, 0x44,
124 | 	0x4C, 0x90, 0x90, 0x90, 0x7C,
125 | 	0x44, 0x64, 0x54, 0x4C, 0x44,
126 | 	0x00, 0x08, 0x36, 0x41, 0x00,
127 | 	0x00, 0x00, 0x77, 0x00, 0x00,
128 | 	0x00, 0x41, 0x36, 0x08, 0x00,
129 | 	0x02, 0x01, 0x02, 0x04, 0x02,
130 | 	0x3C, 0x26, 0x23, 0x26, 0x3C,
131 | 	0x1E, 0xA1, 0xA1, 0x61, 0x12,
132 | 	0x3A, 0x40, 0x40, 0x20, 0x7A,
133 | 	0x38, 0x54, 0x54, 0x55, 0x59,
134 | 	0x21, 0x55, 0x55, 0x79, 0x41,
135 | 	0x22, 0x54, 0x54, 0x78, 0x42, // a-umlaut
136 | 	0x21, 0x55, 0x54, 0x78, 0x40,
137 | 	0x20, 0x54, 0x55, 0x79, 0x40,
138 | 	0x0C, 0x1E, 0x52, 0x72, 0x12,
139 | 	0x39, 0x55, 0x55, 0x55, 0x59,
140 | 	0x39, 0x54, 0x54, 0x54, 0x59,
141 | 	0x39, 0x55, 0x54, 0x54, 0x58,
142 | 	0x00, 0x00, 0x45, 0x7C, 0x41,
143 | 	0x00, 0x02, 0x45, 0x7D, 0x42,
144 | 	0x00, 0x01, 0x45, 0x7C, 0x40,
145 | 	0x7D, 0x12, 0x11, 0x12, 0x7D, // A-umlaut
146 | 	0xF0, 0x28, 0x25, 0x28, 0xF0,
147 | 	0x7C, 0x54, 0x55, 0x45, 0x00,
148 | 	0x20, 0x54, 0x54, 0x7C, 0x54,
149 | 	0x7C, 0x0A, 0x09, 0x7F, 0x49,
150 | 	0x32, 0x49, 0x49, 0x49, 0x32,
151 | 	0x3A, 0x44, 0x44, 0x44, 0x3A, // o-umlaut
152 | 	0x32, 0x4A, 0x48, 0x48, 0x30,
153 | 	0x3A, 0x41, 0x41, 0x21, 0x7A,
154 | 	0x3A, 0x42, 0x40, 0x20, 0x78,
155 | 	0x00, 0x9D, 0xA0, 0xA0, 0x7D,
156 | 	0x3D, 0x42, 0x42, 0x42, 0x3D, // O-umlaut
157 | 	0x3D, 0x40, 0x40, 0x40, 0x3D,
158 | 	0x3C, 0x24, 0xFF, 0x24, 0x24,
159 | 	0x48, 0x7E, 0x49, 0x43, 0x66,
160 | 	0x2B, 0x2F, 0xFC, 0x2F, 0x2B,
161 | 	0xFF, 0x09, 0x29, 0xF6, 0x20,
162 | 	0xC0, 0x88, 0x7E, 0x09, 0x03,
163 | 	0x20, 0x54, 0x54, 0x79, 0x41,
164 | 	0x00, 0x00, 0x44, 0x7D, 0x41,
165 | 	0x30, 0x48, 0x48, 0x4A, 0x32,
166 | 	0x38, 0x40, 0x40, 0x22, 0x7A,
167 | 	0x00, 0x7A, 0x0A, 0x0A, 0x72,
168 | 	0x7D, 0x0D, 0x19, 0x31, 0x7D,
169 | 	0x26, 0x29, 0x29, 0x2F, 0x28,
170 | 	0x26, 0x29, 0x29, 0x29, 0x26,
171 | 	0x30, 0x48, 0x4D, 0x40, 0x20,
172 | 	0x38, 0x08, 0x08, 0x08, 0x08,
173 | 	0x08, 0x08, 0x08, 0x08, 0x38,
174 | 	0x2F, 0x10, 0xC8, 0xAC, 0xBA,
175 | 	0x2F, 0x10, 0x28, 0x34, 0xFA,
176 | 	0x00, 0x00, 0x7B, 0x00, 0x00,
177 | 	0x08, 0x14, 0x2A, 0x14, 0x22,
178 | 	0x22, 0x14, 0x2A, 0x14, 0x08,
179 | 	0x55, 0x00, 0x55, 0x00, 0x55, // #176 (25% block) missing in old code
180 | 	0xAA, 0x55, 0xAA, 0x55, 0xAA, // 50% block
181 | 	0xFF, 0x55, 0xFF, 0x55, 0xFF, // 75% block
182 | 	0x00, 0x00, 0x00, 0xFF, 0x00,
183 | 	0x10, 0x10, 0x10, 0xFF, 0x00,
184 | 	0x14, 0x14, 0x14, 0xFF, 0x00,
185 | 	0x10, 0x10, 0xFF, 0x00, 0xFF,
186 | 	0x10, 0x10, 0xF0, 0x10, 0xF0,
187 | 	0x14, 0x14, 0x14, 0xFC, 0x00,
188 | 	0x14, 0x14, 0xF7, 0x00, 0xFF,
189 | 	0x00, 0x00, 0xFF, 0x00, 0xFF,
190 | 	0x14, 0x14, 0xF4, 0x04, 0xFC,
191 | 	0x14, 0x14, 0x17, 0x10, 0x1F,
192 | 	0x10, 0x10, 0x1F, 0x10, 0x1F,
193 | 	0x14, 0x14, 0x14, 0x1F, 0x00,
194 | 	0x10, 0x10, 0x10, 0xF0, 0x00,
195 | 	0x00, 0x00, 0x00, 0x1F, 0x10,
196 | 	0x10, 0x10, 0x10, 0x1F, 0x10,
197 | 	0x10, 0x10, 0x10, 0xF0, 0x10,
198 | 	0x00, 0x00, 0x00, 0xFF, 0x10,
199 | 	0x10, 0x10, 0x10, 0x10, 0x10,
200 | 	0x10, 0x10, 0x10, 0xFF, 0x10,
201 | 	0x00, 0x00, 0x00, 0xFF, 0x14,
202 | 	0x00, 0x00, 0xFF, 0x00, 0xFF,
203 | 	0x00, 0x00, 0x1F, 0x10, 0x17,
204 | 	0x00, 0x00, 0xFC, 0x04, 0xF4,
205 | 	0x14, 0x14, 0x17, 0x10, 0x17,
206 | 	0x14, 0x14, 0xF4, 0x04, 0xF4,
207 | 	0x00, 0x00, 0xFF, 0x00, 0xF7,
208 | 	0x14, 0x14, 0x14, 0x14, 0x14,
209 | 	0x14, 0x14, 0xF7, 0x00, 0xF7,
210 | 	0x14, 0x14, 0x14, 0x17, 0x14,
211 | 	0x10, 0x10, 0x1F, 0x10, 0x1F,
212 | 	0x14, 0x14, 0x14, 0xF4, 0x14,
213 | 	0x10, 0x10, 0xF0, 0x10, 0xF0,
214 | 	0x00, 0x00, 0x1F, 0x10, 0x1F,
215 | 	0x00, 0x00, 0x00, 0x1F, 0x14,
216 | 	0x00, 0x00, 0x00, 0xFC, 0x14,
217 | 	0x00, 0x00, 0xF0, 0x10, 0xF0,
218 | 	0x10, 0x10, 0xFF, 0x10, 0xFF,
219 | 	0x14, 0x14, 0x14, 0xFF, 0x14,
220 | 	0x10, 0x10, 0x10, 0x1F, 0x00,
221 | 	0x00, 0x00, 0x00, 0xF0, 0x10,
222 | 	0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
223 | 	0xF0, 0xF0, 0xF0, 0xF0, 0xF0,
224 | 	0xFF, 0xFF, 0xFF, 0x00, 0x00,
225 | 	0x00, 0x00, 0x00, 0xFF, 0xFF,
226 | 	0x0F, 0x0F, 0x0F, 0x0F, 0x0F,
227 | 	0x38, 0x44, 0x44, 0x38, 0x44,
228 | 	0xFC, 0x4A, 0x4A, 0x4A, 0x34, // sharp-s or beta
229 | 	0x7E, 0x02, 0x02, 0x06, 0x06,
230 | 	0x02, 0x7E, 0x02, 0x7E, 0x02,
231 | 	0x63, 0x55, 0x49, 0x41, 0x63,
232 | 	0x38, 0x44, 0x44, 0x3C, 0x04,
233 | 	0x40, 0x7E, 0x20, 0x1E, 0x20,
234 | 	0x06, 0x02, 0x7E, 0x02, 0x02,
235 | 	0x99, 0xA5, 0xE7, 0xA5, 0x99,
236 | 	0x1C, 0x2A, 0x49, 0x2A, 0x1C,
237 | 	0x4C, 0x72, 0x01, 0x72, 0x4C,
238 | 	0x30, 0x4A, 0x4D, 0x4D, 0x30,
239 | 	0x30, 0x48, 0x78, 0x48, 0x30,
240 | 	0xBC, 0x62, 0x5A, 0x46, 0x3D,
241 | 	0x3E, 0x49, 0x49, 0x49, 0x00,
242 | 	0x7E, 0x01, 0x01, 0x01, 0x7E,
243 | 	0x2A, 0x2A, 0x2A, 0x2A, 0x2A,
244 | 	0x44, 0x44, 0x5F, 0x44, 0x44,
245 | 	0x40, 0x51, 0x4A, 0x44, 0x40,
246 | 	0x40, 0x44, 0x4A, 0x51, 0x40,
247 | 	0x00, 0x00, 0xFF, 0x01, 0x03,
248 | 	0xE0, 0x80, 0xFF, 0x00, 0x00,
249 | 	0x08, 0x08, 0x6B, 0x6B, 0x08,
250 | 	0x36, 0x12, 0x36, 0x24, 0x36,
251 | 	0x06, 0x0F, 0x09, 0x0F, 0x06,
252 | 	0x00, 0x00, 0x18, 0x18, 0x00,
253 | 	0x00, 0x00, 0x10, 0x10, 0x00,
254 | 	0x30, 0x40, 0xFF, 0x01, 0x01,
255 | 	0x00, 0x1F, 0x01, 0x01, 0x1E,
256 | 	0x00, 0x19, 0x1D, 0x17, 0x12,
257 | 	0x00, 0x3C, 0x3C, 0x3C, 0x3C,
258 | 	0x00, 0x00, 0x00, 0x00, 0x00  // #255 NBSP
259 | };
260 | 


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/glcdfont.h:
--------------------------------------------------------------------------------
1 | #ifndef GLCDFONT_H
2 | #define GLCDFONT_H
3 | 
4 | extern const unsigned char glcdfont[];
5 | 
6 | #endif
7 | 


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/matrix.cfg:
--------------------------------------------------------------------------------
 1 | // LED Matrix Display Configuration
 2 | 
 3 | // Define the entire width and height of the display in pixels.
 4 | // This is the _total_ width and height of the rectangle defined by all the
 5 | // chained panels.  The width should be a multiple of the panel pixel width (32),
 6 | // and the height should be a multiple of the panel pixel height (8, 16, or 32).
 7 | display_width = 64;
 8 | display_height = 64;
 9 | 
10 | // Define the width of each panel in pixels.  This should always be 32 (but can
11 | // in theory be changed).
12 | panel_width = 32;
13 | 
14 | // Define the height of each panel in pixels.  This is typically 8, 16, or 32.
15 | // NOTE: Each panel in the display _must_ be the same height!  You cannot mix
16 | // 16 and 32 pixel high panels for example.
17 | panel_height = 32;
18 | 
19 | // Define the total number of panels in each chain.  Count up however many
20 | // panels are connected together and put that value here.  If you're using
21 | // multiple parallel chains count each one up separately and pick the largest
22 | // value for this configuration.
23 | chain_length = 4;
24 | 
25 | // Define the total number of parallel chains.  If using the Adafruit HAT you
26 | // can only have one chain so stick with the value 1.  The Pi 2 can support up
27 | // to 3 parallel chains, see the rpi-rgb-led-matrix library for more information:
28 | //   https://github.com/hzeller/rpi-rgb-led-matrix#chaining-parallel-chains-and-coordinate-system
29 | parallel_count = 1;
30 | 
31 | // Configure each LED matrix panel.
32 | // This is a two-dimensional array with an entry for each panel.  The array
33 | // defines the grid that will subdivide the display, so for example a 64x64 size
34 | // display with 32x32 pixel panels would be a 2x2 array of panel configurations.
35 | //
36 | // For each panel you must set the order that it is within its chain, i.e. the
37 | // first panel in a chain is order = 0, the next one is order = 1, etc.  You can
38 | // also set a rotation for each panel to account for changes in panel orientation
39 | // (like when 'snaking' a series of panels end to end for shorter wire runs).
40 | //
41 | // For example the configuration below defines this grid display of panels and
42 | // their wiring (starting from the upper right panel and snaking left, down, and
43 | // right to the bottom right panel):
44 | //       ______________    ______________
45 | //      |    Panel     |  |    Panel     |
46 | //   /==| order  = 1   |<=| order  = 0   |<= Chain start (from Pi)
47 | //   |  | rotate = 0   |  | rotate = 0   |
48 | //   |  |______________|  |______________|
49 | //   |   ______________    ______________
50 | //   |  |    Panel     |  |    Panel     |
51 | //   \==| order  = 2   |=>| order  = 3   |
52 | //      | rotate = 180 |  | rotate = 180 |
53 | //      |______________|  |______________|
54 | //
55 | // Notice the chain starts in the upper right and snakes around to the bottom
56 | // right.  The order of each panel is set as its position along the chain,
57 | // and rotation is applied to the lower panels that are flipped around relative
58 | // to the panels above them.
59 | //
60 | // Not shown but if you're using parallel chains you can specify for each entry
61 | // in the panels list a 'parallel = x;' option where x is the ID of a parallel
62 | // chain (0, 1, or 2).
63 | panels = (
64 |   ( { order = 1; rotate =   0; }, { order = 0; rotate =   0; } ),
65 |   ( { order = 2; rotate = 180; }, { order = 3; rotate = 180; } )
66 | )
67 | 
68 | // By default the rpi-fb-matrix tool will resize and scale down the screen
69 | // to fit the resolution of the display panels.  However you can instead grab
70 | // a specific pixel-perfect copy of a region of the screen by setting the x, y
71 | // screen pixel coordinates below.  A rectangle of the exact size of the display
72 | // (i.e. display_width x display_height pixels) will be copied from the screen
73 | // starting at the provided x, y coordinates.  Comment this out to disable
74 | // this crop behavior and instead resize the screen down to the matrix display.
75 | //crop_origin = (0, 0)
76 | 


--------------------------------------------------------------------------------
/rpi-fb-matrix.cpp:
--------------------------------------------------------------------------------
  1 | // -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
  2 | // Program to copy the contents of the Raspberry Pi primary display to LED matrices.
  3 | // Author: Tony DiCola
  4 | #include <iostream>
  5 | #include <stdexcept>
  6 | 
  7 | #include <bcm_host.h>
  8 | #include <fcntl.h>
  9 | #include <led-matrix.h>
 10 | #include <linux/fb.h>
 11 | #include <signal.h>
 12 | #include <sys/ioctl.h>
 13 | #include <sys/mman.h>
 14 | #include <time.h>
 15 | #include <unistd.h>
 16 | 
 17 | #include "Config.h"
 18 | #include "GridTransformer.h"
 19 | 
 20 | using namespace std;
 21 | using namespace rgb_matrix;
 22 | 
 23 | // Global to keep track of if the program should run.
 24 | // Will be set false by a SIGINT handler when ctrl-c is
 25 | // pressed, then the main loop will cleanly exit.
 26 | volatile bool running = true;
 27 | 
 28 | // Class to encapsulate all the logic for capturing an image of the Pi's primary
 29 | // display.  Manages all the BCM GPU and CPU resources automatically while in scope.
 30 | class BCMDisplayCapture {
 31 | public:
 32 |   BCMDisplayCapture(int width=-1, int height=-1):
 33 |     _width(width),
 34 |     _height(height),
 35 |     _display(0),
 36 |     _screen_resource(0),
 37 |     _screen_data(NULL)
 38 |   {
 39 |     // Get information about primary/HDMI display.
 40 |     _display = vc_dispmanx_display_open(0);
 41 |     if (!_display) {
 42 |       throw runtime_error("Unable to open primary display!");
 43 |     }
 44 |     DISPMANX_MODEINFO_T display_info;
 45 |     if (vc_dispmanx_display_get_info(_display, &display_info)) {
 46 |       throw runtime_error("Unable to get primary display information!");
 47 |     }
 48 |     cout << "Primary display:" << endl
 49 |          << " resolution: " << display_info.width << "x" << display_info.height << endl
 50 |          << " format: " << display_info.input_format << endl;
 51 |     // If no width and height were specified then grab the entire screen.
 52 |     if ((_width == -1) || (_height == -1)) {
 53 |       _width = display_info.width;
 54 |       _height = display_info.height;
 55 |     }
 56 |     // Create a GPU image surface to hold the captured screen.
 57 |     uint32_t image_prt;
 58 |     _screen_resource = vc_dispmanx_resource_create(VC_IMAGE_RGB888, _width, _height, &image_prt);
 59 |     if (!_screen_resource) {
 60 |       throw runtime_error("Unable to create screen surface!");
 61 |     }
 62 |     // Create a rectangular region of the captured screen size.
 63 |     vc_dispmanx_rect_set(&_rect, 0, 0, _width, _height);
 64 |     // Allocate CPU memory for copying out the captured screen.  Must be aligned
 65 |     // to a larger size because of GPU surface memory size constraints.
 66 |     _pitch = ALIGN_UP(_width*3, 32);
 67 |     _screen_data = new uint8_t[_pitch*_height];
 68 |   }
 69 | 
 70 |   void capture() {
 71 |     // Capture the primary display and copy it from GPU to CPU memory.
 72 |     vc_dispmanx_snapshot(_display, _screen_resource, (DISPMANX_TRANSFORM_T)0);
 73 |     vc_dispmanx_resource_read_data(_screen_resource, &_rect, _screen_data, _pitch);
 74 |   }
 75 | 
 76 |   void getPixel(int x, int y, uint8_t* r, uint8_t* g, uint8_t* b) {
 77 |     // Grab the requested pixel from the last captured display image.
 78 |     uint8_t* row = _screen_data + (y*_pitch);
 79 |     *r = row[x*3];
 80 |     *g = row[x*3+1];
 81 |     *b = row[x*3+2];
 82 |   }
 83 | 
 84 |   ~BCMDisplayCapture() {
 85 |     // Clean up BCM and other resources.
 86 |     if (_screen_resource != 0) {
 87 |       vc_dispmanx_resource_delete(_screen_resource);
 88 |     }
 89 |     if (_display != 0) {
 90 |       vc_dispmanx_display_close(_display);
 91 |     }
 92 |     if (_screen_data != NULL) {
 93 |       delete[] _screen_data;
 94 |     }
 95 |   }
 96 | 
 97 | private:
 98 |   int _width,
 99 |       _height,
100 |       _pitch;
101 |   DISPMANX_DISPLAY_HANDLE_T _display;
102 |   DISPMANX_RESOURCE_HANDLE_T _screen_resource;
103 |   VC_RECT_T _rect;
104 |   uint8_t* _screen_data;
105 | };
106 | 
107 | static void sigintHandler(int s) {
108 |   running = false;
109 | }
110 | 
111 | static void usage(const char* progname) {
112 |     std::cerr << "Usage: " << progname << " [flags] [config-file]" << std::endl;
113 |     std::cerr << "Flags:" << std::endl;
114 |     rgb_matrix::RGBMatrix::Options matrix_options;
115 |     rgb_matrix::RuntimeOptions runtime_options;
116 |     runtime_options.drop_privileges = -1;  // Need root
117 |     rgb_matrix::PrintMatrixFlags(stderr, matrix_options, runtime_options);
118 | }
119 | 
120 | int main(int argc, char** argv) {
121 |   try {
122 |     // Initialize from flags.
123 |     rgb_matrix::RGBMatrix::Options matrix_options;
124 |     rgb_matrix::RuntimeOptions runtime_options;
125 |     runtime_options.drop_privileges = -1;  // Need root
126 |     if (!rgb_matrix::ParseOptionsFromFlags(&argc, &argv,
127 |                                            &matrix_options, &runtime_options)) {
128 |       usage(argv[0]);
129 |       return 1;
130 |     }
131 | 
132 |     // Read additional configuration from config file if it exists
133 |     Config config(&matrix_options, argc >= 2 ? argv[1] : "/dev/null");
134 |     cout << "Using config values: " << endl
135 |          << " display_width: " << config.getDisplayWidth() << endl
136 |          << " display_height: " << config.getDisplayHeight() << endl
137 |          << " panel_width: " << config.getPanelWidth() << endl
138 |          << " panel_height: " << config.getPanelHeight() << endl
139 |          << " chain_length: " << config.getChainLength() << endl
140 |          << " parallel_count: " << config.getParallelCount() << endl;
141 | 
142 |     // Set screen capture state depending on if a crop region is specified or not.
143 |     // When not cropped grab the entire screen and resize it down to the LED display.
144 |     // However when cropping is enabled instead grab the entire screen (by
145 |     // setting the capture_width and capture_height to -1) and specify an offset
146 |     // to the start of the crop rectangle.
147 |     int capture_width = config.getDisplayWidth();
148 |     int capture_height = config.getDisplayHeight();
149 |     int x_offset = 0;
150 |     int y_offset = 0;
151 |     if (config.hasCropOrigin()) {
152 |       cout << " crop_origin: (" << config.getCropX() << ", " << config.getCropY() << ")" << endl;
153 |       capture_width = -1;
154 |       capture_height = -1;
155 |       x_offset = config.getCropX();
156 |       y_offset = config.getCropY();
157 |     }
158 | 
159 | 
160 |     // Initialize matrix library.
161 |     // Create canvas and apply GridTransformer.
162 |     RGBMatrix *canvas = CreateMatrixFromOptions(matrix_options, runtime_options);
163 |     if (config.hasTransformer()) {
164 |       canvas->ApplyStaticTransformer(config.getGridTransformer());
165 |     }
166 |     canvas->Clear();
167 | 
168 |     // Initialize BCM functions and display capture class.
169 |     bcm_host_init();
170 |     BCMDisplayCapture displayCapture(capture_width, capture_height);
171 | 
172 |     // Loop forever waiting for Ctrl-C signal to quit.
173 |     signal(SIGINT, sigintHandler);
174 |     cout << "Press Ctrl-C to quit..." << endl;
175 |     while (running) {
176 |       // Capture the current display image.
177 |       displayCapture.capture();
178 |       // Loop through the frame data and set the pixels on the matrix canvas.
179 |       for (int y=0; y<config.getDisplayHeight(); ++y) {
180 |         for (int x=0; x<config.getDisplayWidth(); ++x) {
181 |           uint8_t red, green, blue;
182 |           displayCapture.getPixel(x+x_offset, y+y_offset, &red, &green, &blue);
183 |           canvas->SetPixel(x, y, red, green, blue);
184 |         }
185 |       }
186 |       // Sleep for 25 milliseconds (40Hz refresh)
187 |       usleep(25 * 1000);
188 |     }
189 |     canvas->Clear();
190 |     delete canvas;
191 |   }
192 |   catch (const exception& ex) {
193 |     cerr << ex.what() << endl;
194 |     usage(argv[0]);
195 |     return -1;
196 |   }
197 |   return 0;
198 | }
199 | 


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