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Ayke van Laethem
53 lines
1.2 KiB
Go
53 lines
1.2 KiB
Go
package main
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// This example demonstrates how to use pin change interrupts.
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//
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// This is only an example and should not be copied directly in any serious
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// circuit, because it lacks an important feature: debouncing.
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// See: https://en.wikipedia.org/wiki/Switch#Contact_bounce
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import (
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"machine"
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"runtime/volatile"
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"time"
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)
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const (
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button = machine.BUTTON
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led = machine.LED
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)
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func main() {
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var lightLed volatile.Register8
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lightLed.Set(0)
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// Configure the LED, defaulting to on (usually setting the pin to low will
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// turn the LED on).
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led.Configure(machine.PinConfig{Mode: machine.PinOutput})
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led.Low()
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// Make sure the pin is configured as a pullup to avoid floating inputs.
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// Pullup works for most buttons, as most buttons short to ground when
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// pressed.
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button.Configure(machine.PinConfig{Mode: buttonMode})
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// Set an interrupt on this pin.
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err := button.SetInterrupt(buttonPinChange, func(machine.Pin) {
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if lightLed.Get() != 0 {
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lightLed.Set(0)
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led.Low()
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} else {
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lightLed.Set(1)
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led.High()
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}
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})
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if err != nil {
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println("could not configure pin interrupt:", err.Error())
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}
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// Make sure the program won't exit.
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for {
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time.Sleep(time.Hour)
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}
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}
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