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
|
/**
* @file VirtualMatrixPanel.ino
* @brief Example of using the VirtualMatrixPanel_T template class.
*
* The VirtualMatrixPanel_T class can be used for two purposes:
*
* 1) Create a much larger display out of a number of physical LED panels
* chained in a Serpentine or Zig-Zag manner;
*
* 2) Provide a way to deal with weird individual physical panels that do not have a
* simple linear X, Y pixel mapping. For example, 1/4 scan panels, or outdoor panels.
*
* 1) and 2) can be combined and utilsied together.
*
* There are THREE examples contained within this library. What example gets built depends
* on the value of the "#define EXAMPLE_NUMBER X" value. Where X = Example number.
*
* Example 1: STANDARD 1/2 Scan (i.e. 1/16, 1/32) LED matrix panels, 64x32 pixels each,
* in a grid of 2x2 panels, chained in a Serpentine manner.
*
* Example 2: Non-Standard 1/4 Scan (i.e. Four-Scan 1/8) outdoor LED matrix panels, 64x32 pixels each,
* in a grid of 2x2 panels, chained in a Serpentine manner.
*
* Example 3: A single non-standard 1/4 Scan (i.e. Four-Scan 1/8) outdoor LED matrix panel, 64x32 pixels.
*/
#include <Arduino.h>
#include <ESP32-HUB75-VirtualMatrixPanel_T.hpp>
// Select example to compile!
#define EXAMPLE_NUMBER 1
//#define EXAMPLE_NUMBER 2
//#define EXAMPLE_NUMBER 3
/**
* Configuration of the LED matrix panels number and individual pixel resolution.
**/
#define PANEL_RES_X 64 // Number of pixels wide of each INDIVIDUAL panel module.
#define PANEL_RES_Y 32 // Number of pixels tall of each INDIVIDUAL panel module.
#define VDISP_NUM_ROWS 2 // Number of rows of individual LED panels
#define VDISP_NUM_COLS 2 // Number of individual LED panels per row
#define PANEL_CHAIN_LEN (VDISP_NUM_ROWS*VDISP_NUM_COLS) // Don't change
/**
* Configuration of the approach used to chain all the individual panels together.
* Refer to the documentation or check the enum 'PANEL_CHAIN_TYPE' in VirtualMatrixPanel_T.hpp for options.
**/
#define PANEL_CHAIN_TYPE CHAIN_TOP_RIGHT_DOWN
/**
* Optional config for the per-panel pixel mapping, for non-standard panels.
* i.e. 1/4 scan panels, or outdoor panels. They're a pain in the a-- and all
* have their own weird pixel mapping that is not linear.
*
* This is used for Examples 2 and 3.
*
**/
#define PANEL_SCAN_TYPE FOUR_SCAN_32PX_HIGH
/**
* Mandatory declaration of the dma_display. DO NOT CHANGE
**/
MatrixPanel_I2S_DMA *dma_display = nullptr;
/**
* Template instantiation for the VirtualMatrixPanel_T class, depending on use-case.
**/
#if EXAMPLE_NUMBER == 1
// --- Example 1: STANDARD 1/2 Scan ---
// Declare a pointer to the specific instantiation:
VirtualMatrixPanel_T<PANEL_CHAIN_TYPE>* virtualDisp = nullptr;
#endif
#if EXAMPLE_NUMBER == 2
// --- Example 2: Non-Standard 1/4 Scan (Four-Scan 1/8) ---
// Use an existing library user-contributed Scan Type pixel mapping
using MyScanTypeMapping = ScanTypeMapping<PANEL_SCAN_TYPE>;
// Create a pointer to the specific instantiation of the VirtualMatrixPanel_T class
VirtualMatrixPanel_T<PANEL_CHAIN_TYPE, MyScanTypeMapping>* virtualDisp = nullptr;
#endif
#if EXAMPLE_NUMBER == 3
// --- Example 3: Single non-standard 1/4 Scan (Four-Scan 1/8) ---
// Use an existing library user-contributed Scan Type pixel mapping
using MyScanTypeMapping = ScanTypeMapping<PANEL_SCAN_TYPE>;
// Create a pointer to the specific instantiation of the VirtualMatrixPanel_T class
VirtualMatrixPanel_T<CHAIN_NONE, MyScanTypeMapping>* virtualDisp = nullptr;
#endif
// Bonus non-existnat example. Create your own per-panel custom pixel mapping!
#if EXAMPLE_NUMBER == 4
// --- Custom Scan–Type Pixel Mapping ---
// This policy adds a fixed offset to the coordinates.
struct CustomScanTypeMapping {
static constexpr VirtualCoords apply(VirtualCoords coords, int virt_y, int panel_pixel_base) {
// For demonstration, add a fixed offset of +5 to x and +3 to y.
coords.x += 5;
coords.y += 3;
return coords;
}
};
#endif
void setup()
{
Serial.begin(115200);
delay(2000);
#if EXAMPLE_NUMBER == 3
/**
* HACK ALERT!
* For 1/4 scan panels (namely outdoor panels), electrically the pixels are connected in a chain that is
* twice the physical panel's pixel width, and half the pixel height. As such, we need to configure
* the underlying DMA library to match the same. Then we use the VirtualMatrixPanel_T class to map the
* physical pixels to the virtual pixels.
*/
HUB75_I2S_CFG mxconfig(
PANEL_RES_X*2, // DO NOT CHANGE THIS
PANEL_RES_Y/2, // DO NOT CHANGE THIS
1 // A Single panel
);
#elif EXAMPLE_NUMBER == 2
/**
* HACK ALERT!
* For 1/4 scan panels (namely outdoor panels), electrically the pixels are connected in a chain that is
* twice the physical panel's pixel width, and half the pixel height. As such, we need to configure
* the underlying DMA library to match the same. Then we use the VirtualMatrixPanel_T class to map the
* physical pixels to the virtual pixels.
*/
HUB75_I2S_CFG mxconfig(
PANEL_RES_X*2, // DO NOT CHANGE THIS
PANEL_RES_Y/2, // DO NOT CHANGE THIS
PANEL_CHAIN_LEN
);
#else
// Standard panel type natively supported by this library (Example 1)
HUB75_I2S_CFG mxconfig(
PANEL_RES_X,
PANEL_RES_Y,
PANEL_CHAIN_LEN
);
#endif
mxconfig.i2sspeed = HUB75_I2S_CFG::HZ_10M;
mxconfig.clkphase = false;
//mxconfig.driver = HUB75_I2S_CFG::FM6126A;
/**
* Setup physical DMA LED display output.
*/
dma_display = new MatrixPanel_I2S_DMA(mxconfig);
dma_display->begin();
dma_display->setBrightness8(128); //0-255
dma_display->clearScreen();
/**
* Setup the VirtualMatrixPanel_T class to map the virtual pixels to the physical pixels.
*/
#if EXAMPLE_NUMBER == 1
virtualDisp = new VirtualMatrixPanel_T<PANEL_CHAIN_TYPE>(VDISP_NUM_ROWS, VDISP_NUM_COLS, PANEL_RES_X, PANEL_RES_Y);
#elif EXAMPLE_NUMBER == 2
virtualDisp = new VirtualMatrixPanel_T<PANEL_CHAIN_TYPE, MyScanTypeMapping>(VDISP_NUM_ROWS, VDISP_NUM_COLS, PANEL_RES_X, PANEL_RES_Y);
#elif EXAMPLE_NUMBER == 3
virtualDisp = new VirtualMatrixPanel_T<CHAIN_NONE, MyScanTypeMapping>(1, 1, PANEL_RES_X, PANEL_RES_Y); // Single 1/4 scan panel
#endif
// Pass a reference to the DMA display to the VirtualMatrixPanel_T class
virtualDisp->setDisplay(*dma_display);
for (int y = 0; y < virtualDisp->height(); y++) {
for (int x = 0; x < virtualDisp->width(); x++) {
uint16_t color = virtualDisp->color565(96, 0, 0); // red
if (x == 0) color = virtualDisp->color565(0, 255, 0); // g
if (x == (virtualDisp->width()-1)) color = virtualDisp->color565(0, 0, 255); // b
virtualDisp->drawPixel(x, y, color);
delay(2);
}
}
delay(3000);
virtualDisp->clearScreen();
virtualDisp->drawDisplayTest(); // re draw text numbering on each screen to check connectivity
}
void loop() {
// Do nothing here.
delay (100);
}
|
