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48 lines
1.2 KiB
Go
48 lines
1.2 KiB
Go
// Copyright 2025 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 mcp472x_test
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import (
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"log"
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"time"
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"periph.io/x/conn/v3/i2c/i2creg"
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"periph.io/x/conn/v3/physic"
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"periph.io/x/devices/v3/mcp472x"
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"periph.io/x/host/v3"
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)
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// Example demonstrating how to initialize the MCP4728 and set an output
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// voltage.
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func Example() {
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if _, err := host.Init(); err != nil {
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log.Fatal("Error calling host.init()")
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}
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bus, err := i2creg.Open("")
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if err != nil {
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log.Fatal(err)
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}
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defer bus.Close()
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// For a MCP4725, or to use VCC for the reference voltage, specify it as:
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// 3_300 * physic.MilliVolt, etc.
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dev, err := mcp472x.New(bus, mcp472x.DefaultAddress, mcp472x.MCP4728, mcp472x.MCP4728InternalRef)
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if err != nil {
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log.Fatal(err)
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}
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// Program channel 3 to output 512mV
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op := mcp472x.SetOutputParam{DAC: 3, V: 512 * physic.MilliVolt, UseInternalRef: true}
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err = dev.SetOutput(op)
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if err != nil {
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log.Println(err)
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}
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time.Sleep(10 * time.Second)
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// Power down the channel
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op.V = 0
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op.PDMode = mcp472x.PDMode1K
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_ = dev.SetOutput(op)
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}
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