analog

package
Version: v3.6.8+incompatible Latest Latest
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Published: May 24, 2021 License: Apache-2.0 Imports: 3 Imported by: 22

Documentation

Overview

Package analog defines analog pins, both digital to analog converter (DAC) and analog to digital converter (ADC).

Index

Constants

View Source
const (
	// ADC means Analog-to-Digital Converter.
	ADC pin.Func = "ADC"
	// DAC means Digital-to-Analog Converter.
	DAC pin.Func = "DAC"
)

Well known pin functionality.

Variables

View Source
var INVALID invalidPin

INVALID implements both PinADC and PinDAC and fails on all access.

Functions

This section is empty.

Types

type PinADC

type PinADC interface {
	pin.Pin
	// Range returns the maximum supported range [min, max] of the values.
	//
	// It is possible for a DAC that the Sample.V value is not set.
	Range() (Sample, Sample)
	// Read returns the current pin level.
	Read() (Sample, error)
}

PinADC is an analog-to-digital-conversion input.

type PinDAC

type PinDAC interface {
	pin.Pin
	// Range returns the maximum supported range [min, max] of the values.
	//
	// It is possible for a DAC that the Sample.V value is not set.
	Range() (Sample, Sample)
	// Out sets an analog output value.
	Out(v int32) error
}

PinDAC is an digital-to-analog-conversion output.

type Sample

type Sample struct {
	// V is the interpreted electrical tension.
	V physic.ElectricPotential
	// Raw is the raw measurement.
	Raw int32
}

Sample is one analog sample.

Raw must be set, but V may or may not be set, depending if the device knows the electrical tension this measurement represents.

Source Files

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