33 lines
1.5 KiB
C++
33 lines
1.5 KiB
C++
// 8-bit Adafruit_GFX-compatible framebuffer for PicoDVI.
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#include <PicoDVI.h>
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// Here's how a 320x240 8-bit (color-paletted) framebuffer is declared.
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// Second argument ('false' here) means NO double-buffering; all drawing
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// operations are shown as they occur. Third argument is a hardware
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// configuration -- examples are written for Adafruit Feather RP2040 DVI,
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// but that's easily switched out for boards like the Pimoroni Pico DV
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// (use 'pimoroni_demo_hdmi_cfg') or Pico DVI Sock ('pico_sock_cfg').
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DVIGFX8 display(DVI_RES_320x240p60, false, adafruit_feather_dvi_cfg);
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// A 400x240 mode is possible but pushes overclocking even higher than
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// 320x240 mode. SOME BOARDS MIGHT SIMPLY NOT BE COMPATIBLE WITH THIS.
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// May require selecting QSPI div4 clock (Tools menu) to slow down flash
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// accesses, may require further over-volting the CPU to 1.25 or 1.3 V.
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//DVIGFX8 display(DVI_RES_400x240p60, false, adafruit_feather_dvi_cfg);
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void setup() { // Runs once on startup
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if (!display.begin()) { // Blink LED if insufficient RAM
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pinMode(LED_BUILTIN, OUTPUT);
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for (;;) digitalWrite(LED_BUILTIN, (millis() / 500) & 1);
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}
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// Randomize color palette. First entry is left black, last is set white.
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for (int i=1; i<255; i++) display.setColor(i, random(65536));
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display.setColor(255, 0xFFFF);
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}
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void loop() {
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// Draw random lines
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display.drawLine(random(display.width()), random(display.height()), random(display.width()), random(display.height()), random(256));
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}
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