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Even the Raspberry Pi Foundation used GPIO numbers over (congruous) physical pin numbers: https://www.raspberrypi.org/learning/introduction-to-processing/worksheet-2/ Switch our examples as well, so that it they're more clear and hardware-agnostic.
25 lines
544 B
Plaintext
25 lines
544 B
Plaintext
import processing.io.*;
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color bgcolor = 0;
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// GPIO numbers refer to different phyiscal pins on various boards
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// On the Raspberry Pi GPIO 4 is physical pin 7 on the header
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void setup() {
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GPIO.pinMode(4, GPIO.INPUT);
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GPIO.attachInterrupt(4, this, "pinEvent", GPIO.RISING);
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}
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void draw() {
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background(bgcolor);
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}
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// this function will be called whenever GPIO 4 is brought from LOW to HIGH
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void pinEvent(int pin) {
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println("Received interrupt");
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if (bgcolor == 0) {
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bgcolor = color(255);
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} else {
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bgcolor = color(0);
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}
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}
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