56 lines
1.7 KiB
Plaintext
56 lines
1.7 KiB
Plaintext
#include <SPI.h>
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#include <Adafruit_GFX.h>
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#include <Max72xxPanel.h>
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int pinCS = 10; // Attach CS to this pin, DIN to MOSI and CLK to SCK (cf http://arduino.cc/en/Reference/SPI )
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int numberOfHorizontalDisplays = 1;
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int numberOfVerticalDisplays = 1;
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Max72xxPanel matrix = Max72xxPanel(pinCS, numberOfHorizontalDisplays, numberOfVerticalDisplays);
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int pinRandom = A0;
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int wait = 20; // In milliseconds
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void setup() {
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matrix.setIntensity(4); // Set brightness between 0 and 15
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// Adjust to your own needs
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// matrix.setPosition(0, 0, 0); // The first display is at <0, 0>
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// matrix.setPosition(1, 1, 0); // The second display is at <1, 0>
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// matrix.setPosition(2, 2, 0); // The third display is at <2, 0>
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// matrix.setPosition(3, 3, 0); // And the last display is at <3, 0>
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// ...
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// matrix.setRotation(0, 2); // The first display is position upside down
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// matrix.setRotation(3, 2); // The same hold for the last display
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randomSeed(analogRead(pinRandom)); // Initialize random generator
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}
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int x = numberOfHorizontalDisplays * 8 / 2;
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int y = numberOfVerticalDisplays * 8 / 2;
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int xNext, yNext;
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void loop() {
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matrix.drawPixel(x, y, HIGH);
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matrix.write(); // Send bitmap to display
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delay(wait);
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matrix.drawPixel(x, y, LOW); // Erase the old position of our dot
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do {
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switch ( random(4) ) {
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case 0: xNext = constrain(x + 1, 0, matrix.width() - 1); yNext = y; break;
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case 1: xNext = constrain(x - 1, 0, matrix.width() - 1); yNext = y; break;
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case 2: yNext = constrain(y + 1, 0, matrix.height() - 1); xNext = x; break;
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case 3: yNext = constrain(y - 1, 0, matrix.height() - 1); xNext = x; break;
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}
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}
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while ( x == xNext && y == yNext ); // Repeat until we find a new coordinate
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x = xNext;
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y = yNext;
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}
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