46 lines
908 B
Go
46 lines
908 B
Go
package main
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import (
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"machine"
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"time"
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)
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var bzrPin machine.Pin
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var btnA, btnB, btnRot machine.Pin
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func main() {
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// buttons: active LOW (internal pull-up)
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btnA = machine.P1_06
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btnB = machine.P1_04
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btnRot = machine.P0_22 // rotary encoder push button
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btnA.Configure(machine.PinConfig{Mode: machine.PinInputPullup})
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btnB.Configure(machine.PinConfig{Mode: machine.PinInputPullup})
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btnRot.Configure(machine.PinConfig{Mode: machine.PinInputPullup})
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// passive buzzer on P0_31
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bzrPin = machine.P0_31
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bzrPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
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for {
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if !btnA.Get() {
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tone(1046) // C6
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}
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if !btnB.Get() {
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tone(739) // F#5
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}
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if !btnRot.Get() {
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tone(523) // C5
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}
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}
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}
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func tone(freq int) {
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for i := 0; i < 10; i++ {
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bzrPin.High()
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time.Sleep(time.Duration(freq) * time.Microsecond)
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bzrPin.Low()
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time.Sleep(time.Duration(freq) * time.Microsecond)
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}
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}
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