ESP32-HUB75-MatrixPanel-DMA/examples/ChainedPanels/ChainedPanels.ino

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/******************************************************************************
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-----------
Steps to use
-----------
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1) In ESP32-HUB75-MatrixPanel-I2S-DMA.h:
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- Set the MATRIX_HEIGHT to be the y resolution of a physical chained
panels in the line (as panels each must be of the same dimensions).
i.e. If you are chaining 32px 'high' panels, then set MATRIX_HEIGHT to 32.
- Set the MATRIX_WIDTH to be the sum of the x resolution of all the physical
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chained panels (i.e. If you have 4 (four) x (64px w x 32px h) panels, then 64x4 = 256)
i.e. The total pixel 'width' of all the chained panels.
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2) In the sketch (i.e. this example):
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- Set values for NUM_ROWS, NUM_COLS, PANEL_RES_X, PANEL_RES_Y.
There are comments beside them explaining what they are in more detail.
- Other than where the matrix is defined and matrix.begin in the setup, you
should now be using the virtual display for everything (drawing pixels, writing text etc).
You can do a find and replace of all calls if it's an existing sketch
(just make sure you don't replace the definition and the matrix.begin)
- If the sketch makes use of MATRIX_HEIGHT or MATRIX_WIDTH, these will need to be
replaced with the width and height of your virtual screen.
Either make new defines and use that, or you can use virtualDisp.width() or .height()
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Thanks to:
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* Brian Lough for the original example as raised in this issue:
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https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-I2S-DMA/issues/26
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YouTube: https://www.youtube.com/brianlough
Tindie: https://www.tindie.com/stores/brianlough/
Twitter: https://twitter.com/witnessmenow
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* Galaxy-Man for the kind donation of panels make/test that this is possible:
https://github.com/Galaxy-Man
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*****************************************************************************/
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//#define USE_CUSTOM_PINS // uncomment to use custom pins, then provide below
#define A_PIN 26
#define B_PIN 4
#define C_PIN 27
#define D_PIN 2
#define E_PIN 21
#define R1_PIN 5
#define R2_PIN 19
#define G1_PIN 17
#define G2_PIN 16
#define B1_PIN 18
#define B2_PIN 25
#define CLK_PIN 14
#define LAT_PIN 15
#define OE_PIN 13
/******************************************************************************
* VIRTUAL DISPLAY / MATRIX PANEL CHAINING CONFIGURATION
*
* Note 1: If chaining from the top right to the left, and then S curving down
* then serpentine_chain = true and top_down_chain = true
* (these being the last two parameters of the virtualDisp(...) constructor.
*
* Note 2: If chaining starts from the bottom up, then top_down_chain = false.
*
* Note 3: By default, this library has serpentine_chain = true, that is, every
* second row has the panels 'upside down' (rotated 180), so the output
* pin of the row above is right above the input connector of the next
* row.
Example 1 panel chaining:
+-----------------+-----------------+-------------------+
| 64x32px PANEL 3 | 64x32px PANEL 2 | 64x32px PANEL 1 |
| ------------ <-------- | ------------xx |
| [OUT] | [IN] | [OUT] [IN] | [OUT] [ESP IN] |
+--------|--------+-----------------+-------------------+
| 64x32px|PANEL 4 | 64x32px PANEL 5 | 64x32px PANEL 6 |
| \|/ ----------> | -----> |
| [IN] [OUT] | [IN] [OUT] | [IN] [OUT] |
+-----------------+-----------------+-------------------+
Example 1 configuration:
#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 NUM_ROWS 2 // Number of rows of chained INDIVIDUAL PANELS
#define NUM_COLS 3 // Number of INDIVIDUAL PANELS per ROW
virtualDisp(dma_display, NUM_ROWS, NUM_COLS, PANEL_RES_X, PANEL_RES_Y, true, true);
= 192x64 px virtual display, with the top left of panel 3 being pixel co-ord (0,0)
==========================================================
Example 2 panel chaining:
+-------------------+
| 64x32px PANEL 1 |
| ----------------- |
| [OUT] [ESP IN] |
+-------------------+
| 64x32px PANEL 2 |
| |
| [IN] [OUT] |
+-------------------+
| 64x32px PANEL 3 |
| |
| [OUT] [IN] |
+-------------------+
| 64x32px PANEL 4 |
| |
| [IN] [OUT] |
+-------------------+
Example 2 configuration:
#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 NUM_ROWS 4 // Number of rows of chained INDIVIDUAL PANELS
#define NUM_COLS 1 // Number of INDIVIDUAL PANELS per ROW
virtualDisp(dma_display, NUM_ROWS, NUM_COLS, PANEL_RES_X, PANEL_RES_Y, true, true);
virtualDisp(dma_display, NUM_ROWS, NUM_COLS, PANEL_RES_X, PANEL_RES_Y, true, true);
= 128x64 px virtual display, with the top left of panel 1 being pixel co-ord (0,0)
==========================================================
Example 3 panel chaining (bottom up):
+-----------------+-----------------+
| 64x32px PANEL 4 | 64x32px PANEL 3 |
| <---------- |
| [OUT] [IN] | [OUT] [in] |
+-----------------+-----------------+
| 64x32px PANEL 1 | 64x32px PANEL 2 |
| ----------> |
| [ESP IN] [OUT] | [IN] [OUT] |
+-----------------+-----------------+
Example 1 configuration:
#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 NUM_ROWS 2 // Number of rows of chained INDIVIDUAL PANELS
#define NUM_COLS 2 // Number of INDIVIDUAL PANELS per ROW
virtualDisp(dma_display, NUM_ROWS, NUM_COLS, PANEL_RES_X, PANEL_RES_Y, true, false);
= 128x64 px virtual display, with the top left of panel 4 being pixel co-ord (0,0)
*/
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#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 NUM_ROWS 2 // Number of rows of chained INDIVIDUAL PANELS
#define NUM_COLS 2 // Number of INDIVIDUAL PANELS per ROW
/******************************************************************************
* Create physical DMA panel class AND virtual (chained) display class.
******************************************************************************/
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#include <ESP32-VirtualMatrixPanel-I2S-DMA.h>
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MatrixPanel_I2S_DMA dma_display;
VirtualMatrixPanel virtualDisp(dma_display, NUM_ROWS, NUM_COLS, PANEL_RES_X, PANEL_RES_Y, true);
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/******************************************************************************
* Setup!
******************************************************************************/
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void setup() {
delay(2000);
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Serial.begin(115200);
Serial.println(""); Serial.println(""); Serial.println("");
Serial.println("*****************************************************");
Serial.println(" HELLO !");
Serial.println("*****************************************************");
#ifdef USE_CUSTOM_PINS
dma_display.begin(R1_PIN, G1_PIN, B1_PIN, R2_PIN, G2_PIN, B2_PIN, A_PIN, B_PIN, C_PIN, D_PIN, E_PIN, LAT_PIN, OE_PIN, CLK_PIN ); // setup the LED matrix
#else
dma_display.begin();
#endif
// Sanity checks
if (NUM_ROWS <= 1) {
Serial.println(F("There is no reason to use the VirtualDisplay class for a single horizontal chain and row!"));
}
if (dma_display.width() != NUM_ROWS*NUM_COLS*PANEL_RES_X )
{
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Serial.println(F("\r\nERROR: MATRIX_WIDTH and/or MATRIX_HEIGHT in 'ESP32-HUB75-MatrixPanel-I2S-DMA.h'\r\nis not configured correctly for the requested VirtualMatrixPanel dimensions!\r\n"));
Serial.printf("WIDTH according dma_display is %d, but should be %d. Is your NUM_ROWS and NUM_COLS correct?\r\n", dma_display.width(), NUM_ROWS*NUM_COLS*PANEL_RES_X);
return;
}
// So far so good, so continue
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virtualDisp.fillScreen(virtualDisp.color444(0, 0, 0));
virtualDisp.drawDisplayTest(); // draw text numbering on each screen to check connectivity
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delay(3000);
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Serial.println("Chain of 64x32 panels for this example:");
Serial.println("+--------+---------+");
Serial.println("| 4 | 3 |");
Serial.println("| | |");
Serial.println("+--------+---------+");
Serial.println("| 1 | 2 |");
Serial.println("| (ESP) | |");
Serial.println("+--------+---------+");
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virtualDisp.setFont(&FreeSansBold12pt7b);
virtualDisp.setTextColor(virtualDisp.color565(0, 0, 255));
virtualDisp.setTextSize(2);
virtualDisp.setCursor(10, virtualDisp.height()-20);
// Red text inside red rect (2 pix in from edge)
virtualDisp.print("1234") ;
virtualDisp.drawRect(1,1, virtualDisp.width()-2, virtualDisp.height()-2, virtualDisp.color565(255,0,0));
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// White line from top left to bottom right
virtualDisp.drawLine(0,0, virtualDisp.width()-1, virtualDisp.height()-1, virtualDisp.color565(255,255,255));
}
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void loop() {
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} // end loop