kopia lustrzana https://github.com/pimoroni/pimoroni-pico
131 wiersze
3.5 KiB
C++
131 wiersze
3.5 KiB
C++
#include "pico/stdlib.h"
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#include "libraries/pico_graphics/pico_graphics.hpp"
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#include "drivers/hub75/hub75.hpp"
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using namespace pimoroni;
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// Display size in pixels
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// Should be either 64x64 or 32x32 but perhaps 64x32 an other sizes will work.
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// Note: this example uses only 5 address lines so it's limited to 32*2 pixels.
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//If the display looks streaky or corrupted then uncomment one of the other initalisers
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//Works with our 32x32 panels https://shop.pimoroni.com/products/rgb-led-matrix-panel?variant=35962488650 https://shop.pimoroni.com/products/rgb-led-matrix-panel?variant=19321740999
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Hub75 hub75(32, 32, nullptr, PANEL_GENERIC, false);
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//or using 2 of these panels
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//Hub75 hub75(64, 32, nullptr, PANEL_GENERIC, false);
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//and 64x32 panel https://shop.pimoroni.com/products/rgb-led-matrix-panel?variant=42312764298
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//Hub75 hub75(64, 32, nullptr, PANEL_GENERIC, false);
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//or using 2 of these panels
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//Hub75 hub75(128, 32, nullptr, PANEL_GENERIC, false);
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//Works with our 64x64 panel https://shop.pimoroni.com/products/rgb-led-matrix-panel?variant=3029531983882
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//Hub75 hub75(64, 64, nullptr, PANEL_GENERIC, false);
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//or using 2 of these panels
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//Hub75 hub75(128, 64, nullptr, PANEL_GENERIC, false);
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PicoGraphics_PenRGB888 graphics(hub75.width, hub75.height, nullptr);
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// extra row of pixels for sourcing flames and averaging
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int width = hub75.width;
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int height = hub75.height + 2;
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// a buffer that's at least big enough to store 55 x 15 values (to allow for both orientations)
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float heat[4500] = {0.0f};
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void set(int x, int y, float v) {
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heat[x + y * width] = v;
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}
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float get(int x, int y) {
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/*if(x < 0 || x >= width || y < 0 || y >= height) {
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return 0.0f;
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}*/
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x = x < 0 ? 0 : x;
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x = x >= width ? width - 1 : x;
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return heat[x + y * width];
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}
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// Interrupt callback required function
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void __isr dma_complete() {
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hub75.dma_complete();
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}
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int main() {
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//stdio_init_all();
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//Start hub75 driver
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hub75.start(dma_complete);
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bool landscape = true;
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while(true) {
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for(int y = 0; y < height; y++) {
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for(int x = 0; x < width; x++) {
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float value = get(x, y);
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graphics.set_pen(0, 0, 0);
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if(value > 0.5f) {
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graphics.set_pen(255, 255, 180);
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}
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else if(value > 0.4f) {
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graphics.set_pen(220, 160, 0);
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}
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else if(value > 0.3f) {
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graphics.set_pen(180, 30, 0);
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}
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else if(value > 0.22f) {
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graphics.set_pen(20, 20, 20);
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}
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if(landscape) {
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graphics.pixel(Point(x, y));
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}
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else{
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graphics.pixel(Point(y, x));
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}
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// update this pixel by averaging the below pixels
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float average = (get(x, y) + get(x, y + 2) + get(x, y + 1) + get(x - 1, y + 1) + get(x + 1, y + 1)) / 5.0f;
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// damping factor to ensure flame tapers out towards the top of the displays
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average *= landscape ? 0.99f : 0.99f;
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// update the heat map with our newly averaged value
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set(x, y, average);
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}
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}
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hub75.update(&graphics);
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// clear the bottom row and then add a new fire seed to it
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for(int x = 0; x < width; x++) {
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set(x, height - 1, 0.0f);
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}
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// add a new random heat source
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int source_count = landscape ? 7 : 1;
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for(int c = 0; c < source_count; c++) {
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int px = (rand() % (width - 4)) + 2;
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set(px , height - 2, 1.0f);
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set(px + 1, height - 2, 1.0f);
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set(px - 1, height - 2, 1.0f);
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set(px , height - 1, 1.0f);
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set(px + 1, height - 1, 1.0f);
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set(px - 1, height - 1, 1.0f);
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}
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sleep_ms(20);
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}
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return 0;
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}
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