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51 lines
1013 B
Go
51 lines
1013 B
Go
// Copyright 2022 The Periph Authors. All rights reserved.
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// Use of this source code is governed under the Apache License, Version 2.0
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// that can be found in the LICENSE file.
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package tca95xx_test
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import (
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"fmt"
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"log"
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"periph.io/x/conn/v3/gpio"
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"periph.io/x/conn/v3/i2c/i2creg"
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"periph.io/x/devices/v3/tca95xx"
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"periph.io/x/host/v3"
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)
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func Example() {
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// Make sure periph is initialized.
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if _, err := host.Init(); err != nil {
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log.Fatal(err)
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}
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// Open default I²C bus.
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bus, err := i2creg.Open("")
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if err != nil {
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log.Fatalf("failed to open I²C: %v", err)
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}
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defer bus.Close()
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// Create a new I2C IO extender
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extender, err := tca95xx.New(bus, tca95xx.TCA9534, 0x20)
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if err != nil {
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log.Fatalln(err)
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}
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for _, port := range extender.Pins {
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for _, pin := range port {
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err = pin.In(gpio.Float, gpio.NoEdge)
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if err != nil {
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log.Fatalln(err)
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}
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level := pin.Read()
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fmt.Printf("%s\t%s\n", pin.Name(), level.String())
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}
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}
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if err != nil {
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log.Fatalln(err)
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}
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}
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