VirtualMatrixPanel_T
Initial release
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@ -30,7 +30,7 @@ __[BUILD OPTIONS](/doc/BuildOptions.md) | [EXAMPLES](/examples/README.md)__ | [!
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# Introduction
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* This is an ESP32 Arduino/IDF library for HUB75 / HUB75E connection based RGB LED panels.
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* This library 'out of the box' (mostly) supports HUB75 panels where simple TWO rows/lines are updated in parallel... referred to as 'two scan' panels within this documentation.
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* 'Four scan' panels are also supported - but please refer to the Four Scan Panel example sketch.
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* 1/4 (aka. 'Four Scan') outdoor panels are also supported - but please refer to the VirtualMatrixPanel example.
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* The library uses the DMA functionality provided by the ESP32's 'LCD Mode' for fast data output.
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## Features
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@ -1,153 +0,0 @@
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/*************************************************************************
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* Description:
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*
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* The underlying implementation of the ESP32-HUB75-MatrixPanel-I2S-DMA only
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* supports output to HALF scan panels - which means outputting
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* two lines at the same time, 16 or 32 rows apart if a 32px or 64px high panel
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* respectively.
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* This cannot be changed at the DMA layer as it would require a messy and complex
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* rebuild of the library's internals.
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*
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* However, it is possible to connect QUARTER (i.e. FOUR lines updated in parallel)
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* scan panels to this same library and
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* 'trick' the output to work correctly on these panels by way of adjusting the
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* pixel co-ordinates that are 'sent' to the ESP32-HUB75-MatrixPanel-I2S-DMA
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* library.
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*
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**************************************************************************/
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#include "ESP32-HUB75-MatrixPanel-I2S-DMA.h"
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/* Use the Virtual Display class to re-map co-ordinates such that they draw
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* correctly on a 32x16 1/8 Scan panel (or chain of such panels).
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*/
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#include "ESP32-VirtualMatrixPanel-I2S-DMA.h"
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// Panel configuration
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#define PANEL_RES_X 64 // Number of pixels wide of each INDIVIDUAL panel module.
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#define PANEL_RES_Y 32 // Number of pixels tall of each INDIVIDUAL panel module.
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#define NUM_ROWS 1 // Number of rows of chained INDIVIDUAL PANELS
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#define NUM_COLS 2 // Number of INDIVIDUAL PANELS per ROW
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// ^^^ NOTE: DEFAULT EXAMPLE SETUP IS FOR A CHAIN OF TWO x 1/8 SCAN PANELS
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// Change this to your needs, for details on VirtualPanel pls read the PDF!
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#define SERPENT true
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#define TOPDOWN false
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// placeholder for the matrix object
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MatrixPanel_I2S_DMA *dma_display = nullptr;
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// placeholder for the virtual display object
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VirtualMatrixPanel *FourScanPanel = nullptr;
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/******************************************************************************
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* Setup!
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******************************************************************************/
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void setup()
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{
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delay(250);
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Serial.begin(115200);
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Serial.println(""); Serial.println(""); Serial.println("");
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Serial.println("*****************************************************");
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Serial.println("* 1/8 Scan Panel Demonstration *");
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Serial.println("*****************************************************");
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/*
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// 62x32 1/8 Scan Panels don't have a D and E pin!
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HUB75_I2S_CFG::i2s_pins _pins = {
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R1_PIN, G1_PIN, B1_PIN, R2_PIN, G2_PIN, B2_PIN,
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A_PIN, B_PIN, C_PIN, D_PIN, E_PIN,
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LAT_PIN, OE_PIN, CLK_PIN
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};
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*/
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HUB75_I2S_CFG mxconfig(
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PANEL_RES_X*2, // DO NOT CHANGE THIS
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PANEL_RES_Y/2, // DO NOT CHANGE THIS
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NUM_ROWS*NUM_COLS // DO NOT CHANGE THIS
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//,_pins // Uncomment to enable custom pins
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);
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mxconfig.clkphase = false; // Change this if you see pixels showing up shifted wrongly by one column the left or right.
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//mxconfig.driver = HUB75_I2S_CFG::FM6126A; // in case that we use panels based on FM6126A chip, we can set it here before creating MatrixPanel_I2S_DMA object
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// OK, now we can create our matrix object
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dma_display = new MatrixPanel_I2S_DMA(mxconfig);
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// let's adjust default brightness to about 75%
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dma_display->setBrightness8(96); // range is 0-255, 0 - 0%, 255 - 100%
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// Allocate memory and start DMA display
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if( not dma_display->begin() )
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Serial.println("****** !KABOOM! I2S memory allocation failed ***********");
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dma_display->clearScreen();
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delay(500);
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// create FourScanPanellay object based on our newly created dma_display object
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FourScanPanel = new VirtualMatrixPanel((*dma_display), NUM_ROWS, NUM_COLS, PANEL_RES_X, PANEL_RES_Y);
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// THE IMPORTANT BIT BELOW!
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FourScanPanel->setPhysicalPanelScanRate(FOUR_SCAN_32PX_HIGH);
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}
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void loop() {
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// What the panel sees from the DMA engine!
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for (int i=PANEL_RES_X*2+10; i< PANEL_RES_X*(NUM_ROWS*NUM_COLS)*2; i++)
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{
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dma_display->drawLine(i, 0, i, 7, dma_display->color565(255, 0, 0)); // red
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delay(10);
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}
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dma_display->clearScreen();
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delay(1000);
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/*
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// Try again using the pixel / dma memory remapper
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for (int i=PANEL_RES_X+5; i< (PANEL_RES_X*2)-1; i++)
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{
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FourScanPanel->drawLine(i, 0, i, 7, dma_display->color565(0, 0, 255)); // blue
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delay(10);
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}
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*/
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// Try again using the pixel / dma memory remapper
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int offset = PANEL_RES_X*((NUM_ROWS*NUM_COLS)-1);
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for (int i=0; i< PANEL_RES_X; i++)
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{
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FourScanPanel->drawLine(i+offset, 0, i+offset, 7, dma_display->color565(0, 0, 255)); // blue
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FourScanPanel->drawLine(i+offset, 8, i+offset, 15, dma_display->color565(0, 128,0)); // g
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FourScanPanel->drawLine(i+offset, 16, i+offset, 23, dma_display->color565(128, 0,0)); // red
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FourScanPanel->drawLine(i+offset, 24, i+offset, 31, dma_display->color565(0, 128, 128)); // blue
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delay(10);
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}
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delay(1000);
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// Print on each chained panel 1/8 module!
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// This only really works for a single horizontal chain
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for (int i = 0; i < NUM_ROWS*NUM_COLS; i++)
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{
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FourScanPanel->setTextColor(FourScanPanel->color565(255, 255, 255));
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FourScanPanel->setCursor(i*PANEL_RES_X+7, FourScanPanel->height()/3);
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// Red text inside red rect (2 pix in from edge)
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FourScanPanel->print("Panel " + String(i+1));
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FourScanPanel->drawRect(1,1, FourScanPanel->width()-2, FourScanPanel->height()-2, FourScanPanel->color565(255,0,0));
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// White line from top left to bottom right
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FourScanPanel->drawLine(0,0, FourScanPanel->width()-1, FourScanPanel->height()-1, FourScanPanel->color565(255,255,255));
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}
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delay(2000);
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dma_display->clearScreen();
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} // end loop
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@ -1,7 +0,0 @@
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# Using this library with 32x16 1/4 Scan Panels
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## Problem
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ESP32-HUB75-MatrixPanel-I2S-DMA library will not display output correctly with 'Four Scan' 64x32 1/8 or 32x16 1/4 scan panels such [as this](https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-I2S-DMA/issues/154) by default.
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## Solution
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It is possible to connect 1/8 scan panels to this library and 'trick' the output to work correctly on these panels by way of adjusting the pixel co-ordinates that are 'sent' to the underlying ESP32-HUB75-MatrixPanel-I2S-DMA library (in this example, it is the 'dmaOutput' class).
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@ -1,4 +1,9 @@
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## Chained Panels example - Chaining individual LED matrix panels to make a larger panel ##
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# The 'VirtualMatrixPanel_T' class
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The `VirtualMatrixPanel_T` is used to perform pixel re-mapping in order to support the following use-cases that can be used together:
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1. To create a larger display based on a chain of individual physical panels connected electrically in a Serpentine or Zig-Zag manner.
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2. To provide support for physical panels with non-standard (i.e. Not a 1/2 scan panel) pixel mapping approaches. This is often seen with 1/4 scan outdoor panels.
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## 1. Chaining individual LED matrix panels to make a larger virtual display ##
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This is the PatternPlasma Demo adopted for use with multiple LED Matrix Panel displays arranged in a non standard order (i.e. a grid) to make a bigger display.
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@ -19,33 +24,34 @@ For example: You bought four (4) 64x32px panels, and wanted to use them to creat
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1. [Refer to this document](https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-DMA/blob/master/doc/VirtualMatrixPanel.pdf) for an explanation and refer to this example on how to use.
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2. In your Arduino sketch, configure these defines accordingly:
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2. Read the `VirtualMatrixPanel.ino` code
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## 2. Using this library with 1/4 Scan Panels (Four Scan)
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This library does not natively support 'Four Scan' 64x32 1/8 or 32x16 1/4 scan panels such [as this](https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-I2S-DMA/issues/154) by default.
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### Solution
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Read the `VirtualMatrixPanel.ino` code.
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The VirtualMatrixPanel_T class provides a way to additionally remap pixel for each individual panel by way of the `ScanTypeMapping` class.
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You can create your own custom per-panel pixel mapping class as well should you wish.
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```cpp
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// --- Example 3: Single non-standard 1/4 Scan (Four-Scan 1/8) ---
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// Use an existing library user-contributed Scan Type pixel mapping
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using MyScanTypeMapping = ScanTypeMapping<FOUR_SCAN_32PX_HIGH>;
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// Create a pointer to the specific instantiation of the VirtualMatrixPanel_T class
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VirtualMatrixPanel_T<CHAIN_NONE, MyScanTypeMapping>* virtualDisp = nullptr;
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```
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#define PANEL_RES_X 64 // Number of pixels wide of each INDIVIDUAL panel module.
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#define PANEL_RES_Y 32 // Number of pixels tall of each INDIVIDUAL panel module.
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#define NUM_ROWS 2 // Number of rows of chained INDIVIDUAL PANELS
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#define NUM_COLS 2 // Number of INDIVIDUAL PANELS per ROW
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The library has these user-contributed additions, but given the variety of panels on the market, your success with any of these may vary.
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#define PANEL_CHAIN NUM_ROWS*NUM_COLS // total number of panels chained one to another
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#define VIRTUAL_MATRIX_CHAIN_TYPE <INSERT CHAINING TYPE HERE - Refer to documentation or example>
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```
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VIRTUAL_MATRIX_CHAIN_TYPE's:
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3. In your Arduino sketch, use the 'VirtualMatrixPanel' class instance (virtualDisp) to draw to the display (i.e. drawPixel), instead of the underling MatrixPanel_I2S_DMA class instance (dma_display).
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#### Thanks to ####
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* Brian Lough for the Virtual to Real pixel co-ordinate code.
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YouTube: https://www.youtube.com/brianlough
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Tindie: https://www.tindie.com/stores/brianlough/
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Twitter: https://twitter.com/witnessmenow
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* Galaxy-Man for the donation of hardware for testing.
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```cpp
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FOUR_SCAN_32PX_HIGH, ///< Four-scan mode, 32-pixel high panels.
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FOUR_SCAN_16PX_HIGH, ///< Four-scan mode, 16-pixel high panels.
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FOUR_SCAN_64PX_HIGH, ///< Four-scan mode, 64-pixel high panels.
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FOUR_SCAN_40PX_HIGH ///< Four-scan mode, 40-pixel high panels.
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```
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@ -39,10 +39,8 @@
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#ifdef USE_GFX_LITE
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#include "GFX_Lite.h"
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// #include <Fonts/FreeSansBold12pt7b.h>
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#elif !defined(NO_GFX)
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#include "Adafruit_GFX.h"
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// #include <Fonts/FreeSansBold12pt7b.h>
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#endif
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// ----------------------------------------------------------------------
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@ -273,14 +271,40 @@ public:
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// this->setFont(&FreeSansBold12pt7b);
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this->setTextColor(display->color565(255, 255, 0));
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// this->setTextSize(1);
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for (int panel = 0; panel < vmodule_cols * vmodule_rows; panel++) {
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int top_left_x = (panel == 0) ? 0 : (panel * panel_res_x);
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this->drawRect(top_left_x, 0, panel_res_x, panel_res_y, this->color565(0, 255, 0));
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this->setCursor((panel * panel_res_x) + 2, panel_res_y - 10);
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this->print((vmodule_cols * vmodule_rows) - panel);
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for (int col = 0; col < vmodule_cols; col++) {
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for (int row = 0; row < vmodule_rows; row++) {
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int start_x = col * panel_res_x;
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int start_y = row * panel_res_y;
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int panel_id = col + (row * vmodule_cols) + 1;
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//int top_left_x = panel * panel_res_x;
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this->drawRect(start_x, start_y, panel_res_x, panel_res_y, this->color565(0, 255, 0));
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this->setCursor(start_x + panel_res_x/2 - 2, start_y + panel_res_y/2 - 4);
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this->print(panel_id);
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log_d("drawDisplayTest() Panel: %d, start_x: %d, start_y: %d", panel_id, start_x, start_y);
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}
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}
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}
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inline void drawDisplayTestDMA()
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{
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// Write to the underlying panels only via the dma_display instance.
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// This only works on standard panels with a linear mapping (i.e. two-scan).
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this->display->setTextColor(this->display->color565(255, 255, 0));
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this->display->setTextSize(1);
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for (int panel = 0; panel < vmodule_cols * vmodule_rows; panel++)
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{
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int top_left_x = panel * panel_res_x;
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this->display->drawRect(top_left_x, 0, panel_res_x, panel_res_y, this->display->color565(0, 255, 0));
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this->display->setCursor((panel * panel_res_x) + 6, panel_res_y - 12);
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this->display->print((vmodule_cols * vmodule_rows) - panel);
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}
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}
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#endif
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inline void clearScreen() { display->clearScreen(); }
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@ -427,16 +451,11 @@ public:
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coords.y = virt_y;
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}
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//log_d("calcCoords post-chain: virt_x: %d, virt_y: %d", virt_x, virt_y);
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//log_d("calcCoords post-chain: virt_x: %d, virt_y: %d", virt_x, virt_y);
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if constexpr (ScanTypeMapping != STANDARD_TWO_SCAN) {
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// --- Apply physical LED panel scan–type mapping / fix ---
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coords = ScanTypeMapping::apply(coords, virt_y, panel_pixel_base);
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// --- Apply physical LED panel scan–type mapping / fix ---
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coords = ScanTypeMapping::apply(coords, virt_y, panel_pixel_base);
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}
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//return coords;
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}
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#ifdef NO_GFX
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