ESP32-HUB75-MatrixPanel-DMA/examples/1_SimpleTestShapes/1_SimpleTestShapes.ino

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// Example sketch which shows how to display some patterns
// on a 64x32 LED matrix
//
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#include <ESP32-HUB75-MatrixPanel-I2S-DMA.h>
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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 PANEL_CHAIN 1 // Total number of panels chained one to another
//MatrixPanel_I2S_DMA dma_display;
MatrixPanel_I2S_DMA *dma_display = nullptr;
uint16_t myBLACK = dma_display->color565(0, 0, 0);
uint16_t myWHITE = dma_display->color565(255, 255, 255);
uint16_t myRED = dma_display->color565(255, 0, 0);
uint16_t myGREEN = dma_display->color565(0, 255, 0);
uint16_t myBLUE = dma_display->color565(0, 0, 255);
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// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
// From: https://gist.github.com/davidegironi/3144efdc6d67e5df55438cc3cba613c8
uint16_t colorWheel(uint8_t pos) {
if(pos < 85) {
return dma_display->color565(pos * 3, 255 - pos * 3, 0);
} else if(pos < 170) {
pos -= 85;
return dma_display->color565(255 - pos * 3, 0, pos * 3);
} else {
pos -= 170;
return dma_display->color565(0, pos * 3, 255 - pos * 3);
}
}
void drawText(int colorWheelOffset)
{
// draw text with a rotating colour
dma_display->setTextSize(1); // size 1 == 8 pixels high
dma_display->setTextWrap(false); // Don't wrap at end of line - will do ourselves
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dma_display->setCursor(5, 0); // start at top left, with 8 pixel of spacing
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uint8_t w = 0;
const char *str = "ESP32 DMA";
for (w=0; w<strlen(str); w++) {
dma_display->setTextColor(colorWheel((w*32)+colorWheelOffset));
dma_display->print(str[w]);
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}
dma_display->println();
dma_display->print(" ");
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for (w=9; w<18; w++) {
dma_display->setTextColor(colorWheel((w*32)+colorWheelOffset));
dma_display->print("*");
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}
dma_display->println();
dma_display->setTextColor(dma_display->color444(15,15,15));
dma_display->println("LED MATRIX!");
// print each letter with a fixed rainbow color
dma_display->setTextColor(dma_display->color444(0,8,15));
dma_display->print('3');
dma_display->setTextColor(dma_display->color444(15,4,0));
dma_display->print('2');
dma_display->setTextColor(dma_display->color444(15,15,0));
dma_display->print('x');
dma_display->setTextColor(dma_display->color444(8,15,0));
dma_display->print('6');
dma_display->setTextColor(dma_display->color444(8,0,15));
dma_display->print('4');
// Jump a half character
dma_display->setCursor(34, 24);
dma_display->setTextColor(dma_display->color444(0,15,15));
dma_display->print("*");
dma_display->setTextColor(dma_display->color444(15,0,0));
dma_display->print('R');
dma_display->setTextColor(dma_display->color444(0,15,0));
dma_display->print('G');
dma_display->setTextColor(dma_display->color444(0,0,15));
dma_display->print("B");
dma_display->setTextColor(dma_display->color444(15,0,8));
dma_display->println("*");
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}
void setup() {
// Module configuration
HUB75_I2S_CFG mxconfig(
PANEL_RES_X, // module width
PANEL_RES_Y, // module height
PANEL_CHAIN // Chain length
);
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//mxconfig.gpio.e = 18;
//mxconfig.clkphase = false;
//mxconfig.driver = HUB75_I2S_CFG::FM6126A;
// Display Setup
dma_display = new MatrixPanel_I2S_DMA(mxconfig);
dma_display->begin();
dma_display->setBrightness8(90); //0-255
dma_display->clearScreen();
dma_display->fillScreen(myWHITE);
// fix the screen with green
dma_display->fillRect(0, 0, dma_display->width(), dma_display->height(), dma_display->color444(0, 15, 0));
delay(500);
// draw a box in yellow
dma_display->drawRect(0, 0, dma_display->width(), dma_display->height(), dma_display->color444(15, 15, 0));
delay(500);
// draw an 'X' in red
dma_display->drawLine(0, 0, dma_display->width()-1, dma_display->height()-1, dma_display->color444(15, 0, 0));
dma_display->drawLine(dma_display->width()-1, 0, 0, dma_display->height()-1, dma_display->color444(15, 0, 0));
delay(500);
// draw a blue circle
dma_display->drawCircle(10, 10, 10, dma_display->color444(0, 0, 15));
delay(500);
// fill a violet circle
dma_display->fillCircle(40, 21, 10, dma_display->color444(15, 0, 15));
delay(500);
// fill the screen with 'black'
dma_display->fillScreen(dma_display->color444(0, 0, 0));
//drawText(0);
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}
uint8_t wheelval = 0;
void loop() {
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// animate by going through the colour wheel for the first two lines
drawText(wheelval);
wheelval +=1;
delay(20);
/*
drawText(0);
delay(2000);
dma_display->clearScreen();
dma_display->fillScreen(myBLACK);
delay(2000);
dma_display->fillScreen(myBLUE);
delay(2000);
dma_display->fillScreen(myRED);
delay(2000);
dma_display->fillScreen(myGREEN);
delay(2000);
dma_display->fillScreen(myWHITE);
dma_display->clearScreen();
*/
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}