133 lines
4 KiB
C++
133 lines
4 KiB
C++
// Example sketch which shows how to display some patterns
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// on a 64x32 LED matrix
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//
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#include <ESP32-HUB75-MatrixPanel-I2S-DMA.h>
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/*
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* Below is an example of the 'legacy' way of initialising the MatrixPanel_I2S_DMA class.
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* i.e. Matrix Width and Height will need to be confirmed as compile-time directives.
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* By default the library assumes a single 64x32 pixel panel is connected.
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*
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* Refer to the example '2_PatternPlasma' on the new / correct way to setup this library
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* for different resolutions / panel chain lengths.
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*
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*/
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MatrixPanel_I2S_DMA dma_display;
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// Or use an Alternative non-DMA library, i.e:
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//#include <P3RGB64x32MatrixPanel.h>
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//P3RGB64x32MatrixPanel display;
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// Input a value 0 to 255 to get a color value.
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// The colours are a transition r - g - b - back to r.
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// From: https://gist.github.com/davidegironi/3144efdc6d67e5df55438cc3cba613c8
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uint16_t colorWheel(uint8_t pos) {
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if(pos < 85) {
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return dma_display.color565(pos * 3, 255 - pos * 3, 0);
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} else if(pos < 170) {
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pos -= 85;
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return dma_display.color565(255 - pos * 3, 0, pos * 3);
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} else {
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pos -= 170;
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return dma_display.color565(0, pos * 3, 255 - pos * 3);
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}
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}
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void drawText(int colorWheelOffset)
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{
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// draw text with a rotating colour
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dma_display.setTextSize(1); // size 1 == 8 pixels high
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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;
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const char *str = "ESP32 DMA";
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for (w=0; w<strlen(str); w++) {
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dma_display.setTextColor(colorWheel((w*32)+colorWheelOffset));
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dma_display.print(str[w]);
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}
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dma_display.println();
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dma_display.print(" ");
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for (w=9; w<18; w++) {
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dma_display.setTextColor(colorWheel((w*32)+colorWheelOffset));
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dma_display.print("*");
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}
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dma_display.println();
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dma_display.setTextColor(dma_display.color444(15,15,15));
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dma_display.println("LED MATRIX!");
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// print each letter with a fixed rainbow color
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dma_display.setTextColor(dma_display.color444(0,8,15));
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dma_display.print('3');
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dma_display.setTextColor(dma_display.color444(15,4,0));
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dma_display.print('2');
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dma_display.setTextColor(dma_display.color444(15,15,0));
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dma_display.print('x');
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dma_display.setTextColor(dma_display.color444(8,15,0));
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dma_display.print('6');
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dma_display.setTextColor(dma_display.color444(8,0,15));
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dma_display.print('4');
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// Jump a half character
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dma_display.setCursor(34, 24);
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dma_display.setTextColor(dma_display.color444(0,15,15));
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dma_display.print("*");
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dma_display.setTextColor(dma_display.color444(15,0,0));
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dma_display.print('R');
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dma_display.setTextColor(dma_display.color444(0,15,0));
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dma_display.print('G');
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dma_display.setTextColor(dma_display.color444(0,0,15));
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dma_display.print("B");
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dma_display.setTextColor(dma_display.color444(15,0,8));
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dma_display.println("*");
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}
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void setup() {
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dma_display.begin(); // use default pins
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// fix the screen with green
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dma_display.fillRect(0, 0, dma_display.width(), dma_display.height(), dma_display.color444(0, 15, 0));
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delay(500);
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// draw a box in yellow
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dma_display.drawRect(0, 0, dma_display.width(), dma_display.height(), dma_display.color444(15, 15, 0));
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delay(500);
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// draw an 'X' in red
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dma_display.drawLine(0, 0, dma_display.width()-1, dma_display.height()-1, dma_display.color444(15, 0, 0));
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dma_display.drawLine(dma_display.width()-1, 0, 0, dma_display.height()-1, dma_display.color444(15, 0, 0));
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delay(500);
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// draw a blue circle
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dma_display.drawCircle(10, 10, 10, dma_display.color444(0, 0, 15));
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delay(500);
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// fill a violet circle
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dma_display.fillCircle(40, 21, 10, dma_display.color444(15, 0, 15));
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delay(500);
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// fill the screen with 'black'
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dma_display.fillScreen(dma_display.color444(0, 0, 0));
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drawText(0);
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}
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uint8_t wheelval = 0;
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void loop() {
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// animate by going through the colour wheel for the first two lines
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drawText(wheelval);
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wheelval +=1;
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delay(20);
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}
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