Got this code on github, from majsatic, however will not work all the way for me am I missing something
/******************************************************************************
-------------------------------------------------------------------------
Steps to create a virtual display made up of a chain of panels in a grid
-------------------------------------------------------------------------
Read the documentation!
https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-DMA/tree/master/examples/ChainedPanels
tl/dr:
- Set values for NUM_ROWS, NUM_COLS, PANEL_RES_X, PANEL_RES_Y, PANEL_CHAIN_TYPE.
- 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()
*****************************************************************************/
// 1) Include key virtual display library
#include <ESP32-VirtualMatrixPanel-I2S-DMA.h>
// 2) Set configuration
#define NUM_ROWS 2 // Number of rows of chained INDIVIDUAL PANELS
#define NUM_COLS 2 // Number of INDIVIDUAL PANELS per ROW
#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 PANEL_CHAIN NUM_ROWS*NUM_COLS // total number of panels chained one to another
/* Configure the serpetine chaining approach. Options are:
CHAIN_TOP_LEFT_DOWN
CHAIN_TOP_RIGHT_DOWN
CHAIN_BOTTOM_LEFT_UP
CHAIN_BOTTOM_RIGHT_UP
The location (i.e. 'TOP_LEFT', 'BOTTOM_RIGHT') etc. refers to the starting point where
the ESP32 is located, and how the chain of panels will 'roll out' from there.
In this example we're using 'CHAIN_BOTTOM_LEFT_UP' which would look like this in the real world:
Chain of 4 x 64x32 panels with the ESP at the BOTTOM_LEFT:
+---------+---------+
| 4 | 3 |
| | |
+---------+---------+
| 1 | 2 |
| (ESP) | |
+---------+---------+
*/
#define VIRTUAL_MATRIX_CHAIN_TYPE CHAIN_BOTTOM_RIGHT_UP
// 3) Create the runtime objects to use
// placeholder for the matrix object
MatrixPanel_I2S_DMA *dma_display = nullptr;
// placeholder for the virtual display object
VirtualMatrixPanel *virtualDisp = nullptr;
/******************************************************************************
* Setup!
******************************************************************************/
void setup() {
delay(2000);
Serial.begin(115200);
Serial.println(""); Serial.println(""); Serial.println("");
Serial.println("*****************************************************");
Serial.println(" HELLO !");
Serial.println("*****************************************************");
/******************************************************************************
* Create physical DMA panel class AND virtual (chained) display class.
******************************************************************************/
/*
The configuration for MatrixPanel_I2S_DMA object is held in HUB75_I2S_CFG structure,
All options has it's predefined default values. So we can create a new structure and redefine only the options we need
Please refer to the '2_PatternPlasma.ino' example for detailed example of how to use the MatrixPanel_I2S_DMA configuration
*/
HUB75_I2S_CFG mxconfig(
PANEL_RES_X, // module width
PANEL_RES_Y, // module height
PANEL_CHAIN // chain length
);
//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
// 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!"));
}
// OK, now we can create our matrix object
dma_display = new MatrixPanel_I2S_DMA(mxconfig);
// let's adjust default brightness to about 75%
dma_display->setBrightness8(250); // range is 0-255, 0 - 0%, 255 - 100%
// Allocate memory and start DMA display
if( not dma_display->begin() )
Serial.println("****** !KABOOM! I2S memory allocation failed ***********");
// create VirtualDisplay object based on our newly created dma_display object
virtualDisp = new VirtualMatrixPanel((*dma_display), NUM_ROWS, NUM_COLS, PANEL_RES_X, PANEL_RES_Y, VIRTUAL_MATRIX_CHAIN_TYPE);
// So far so good, so continue
virtualDisp->fillScreen(virtualDisp->color444(0, 0, 0));
virtualDisp->drawDisplayTest(); // draw text numbering on each screen to check connectivity
// delay(1000);
Serial.println("Chain of 4x 64x32 panels for this example:");
Serial.println("+---------+---------+");
Serial.println("| 4 | 3 |");
Serial.println("| | |");
Serial.println("+---------+---------+");
Serial.println("| 1 | 2 |");
Serial.println("| (ESP32) | |");
Serial.println("+---------+---------+");
// draw blue text
virtualDisp->setFont(&FreeSansBold12pt7b);
virtualDisp->setTextColor(virtualDisp->color565(0, 0, 255));
virtualDisp->setTextSize(2);
virtualDisp->setCursor(0, virtualDisp->height()- ((virtualDisp->height()-45)/2));
virtualDisp->print("THIS");
// Red text inside red rect (2 pix in from edge)
virtualDisp->drawRect(1,1, virtualDisp->width()-2, virtualDisp->height()-2, virtualDisp->color565(255,0,0));
// White line from top left to bottom right
virtualDisp->drawLine(0,0, virtualDisp->width()-1, virtualDisp->height()-1, virtualDisp->color565(255,255,255));
virtualDisp->drawDisplayTest(); // re draw text numbering on each screen to check connectivity
}
void loop() {
} // end loop
/*****************************************************************************
Thanks to:
* Brian Lough for the original example as raised in this issue:
https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-I2S-DMA/issues/26
YouTube: https://www.youtube.com/brianlough
Tindie: https://www.tindie.com/stores/brianlough/
Twitter: https://twitter.com/witnessmenow
* Galaxy-Man for the kind donation of panels make/test that this is possible:
https://github.com/Galaxy-Man
*****************************************************************************/
since I am still way to new to figure out the problems if i can get pointed to the right area that would be helpfull.
as can be seen the grid works fine except that grids 2-4 are off one pixel no matter if I switch the panels around.
