Remarks

A4988
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

A4988 a4988;

public override Task Initialize()
{
    a4988 = new A4988(
        step: Device.Pins.D01,
        direction: Device.Pins.D00,
        ms1Pin: Device.Pins.D04,
        ms2Pin: Device.Pins.D03,
        ms3Pin: Device.Pins.D02);

    return base.Initialize();
}

public override Task Run()
{
    var stepDivisors = (StepDivisor[])Enum.GetValues(typeof(StepDivisor));
    while (true)
    {
        foreach (var step in stepDivisors)
        {
            for (var d = 2; d < 5; d++)
            {
                Resolver.Log.Info($"180 degrees..Speed divisor = {d}..1/{(int)step} Steps..{a4988.Direction}...");
                a4988.RotationSpeedDivisor = d;
                a4988.StepDivisor = step;
                a4988.Rotate(180);

                Thread.Sleep(500);
            }
        }
        a4988.Direction = (a4988.Direction == RotationDirection.Clockwise) ? RotationDirection.CounterClockwise : RotationDirection.Clockwise;
    }
}

Sample project(s) available on GitHub

Wiring Example

To wire a A4988 to your Meadow board, connect the following:

A4988	Meadow Pin
GND	GND
VCC	5V
STEP	D01
DIRECTION	D00
M1	D04
M2	D03
M3	D02

It should look like the following diagram:

Characteristic	Locus
Inheritance	object > A4988
Inherited Members	object.Equals(object) object.Equals(object, object) object.GetHashCode() object.GetType() object.MemberwiseClone() object.ReferenceEquals(object, object) object.ToString()
Namespace	Meadow.Foundation.Motors.Stepper
Assembly	A4988.dll

Syntax

public class A4988

Constructors

A4988(IPin, IPin)

Creates an instance of the A4988 Stepper Motor Driver

Declaration

public A4988(IPin step, IPin direction)

Parameters

Type	Name	Description
IPin	step	The Meadow pin connected to the STEP pin of the A4988
IPin	direction	The Meadow pin connected to the DIR pin of the A4988

Remarks

You must provide either all of the micro-step (MS) lines or none of them

A4988(IPin, IPin, IPin)

Creates an instance of the A4988 Stepper Motor Driver

Declaration

public A4988(IPin step, IPin direction, IPin enable)

Parameters

Type	Name	Description
IPin	step	The Meadow pin connected to the STEP pin of the A4988
IPin	direction	The Meadow pin connected to the DIR pin of the A4988
IPin	enable	The (optional) Meadow pin connected to the ENABLE pin of the A4988

Remarks

A4988
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

A4988 a4988;

public override Task Initialize()
{
    a4988 = new A4988(
        step: Device.Pins.D01,
        direction: Device.Pins.D00,
        ms1Pin: Device.Pins.D04,
        ms2Pin: Device.Pins.D03,
        ms3Pin: Device.Pins.D02);

    return base.Initialize();
}

public override Task Run()
{
    var stepDivisors = (StepDivisor[])Enum.GetValues(typeof(StepDivisor));
    while (true)
    {
        foreach (var step in stepDivisors)
        {
            for (var d = 2; d < 5; d++)
            {
                Resolver.Log.Info($"180 degrees..Speed divisor = {d}..1/{(int)step} Steps..{a4988.Direction}...");
                a4988.RotationSpeedDivisor = d;
                a4988.StepDivisor = step;
                a4988.Rotate(180);

                Thread.Sleep(500);
            }
        }
        a4988.Direction = (a4988.Direction == RotationDirection.Clockwise) ? RotationDirection.CounterClockwise : RotationDirection.Clockwise;
    }
}

Sample project(s) available on GitHub

Wiring Example

To wire a A4988 to your Meadow board, connect the following:

A4988	Meadow Pin
GND	GND
VCC	5V
STEP	D01
DIRECTION	D00
M1	D04
M2	D03
M3	D02

It should look like the following diagram:

A4988(IPin, IPin, IPin, IPin, IPin)

Creates an instance of the A4988 Stepper Motor Driver

Declaration

public A4988(IPin step, IPin direction, IPin ms1Pin, IPin ms2Pin, IPin ms3Pin)

Parameters

Type	Name	Description
IPin	step	The Meadow pin connected to the STEP pin of the A4988
IPin	direction	The Meadow pin connected to the DIR pin of the A4988
IPin	ms1Pin	The (optional) Meadow pin connected to the MS1 pin of the A4988
IPin	ms2Pin	The (optional) Meadow pin connected to the MS2 pin of the A4988
IPin	ms3Pin	The (optional) Meadow pin connected to the MS3 pin of the A4988

Remarks

You must provide either all of the micro-step (MS) lines or none of them

A4988(IPin, IPin, IPin, IPin, IPin, IPin)

Creates an instance of the A4988 Stepper Motor Driver

Declaration

public A4988(IPin step, IPin direction, IPin enablePin, IPin ms1Pin, IPin ms2Pin, IPin ms3Pin)

Parameters

Type	Name	Description
IPin	step	The Meadow pin connected to the STEP pin of the A4988
IPin	direction	The Meadow pin connected to the DIR pin of the A4988
IPin	enablePin	The (optional) Meadow pin connected to the ENABLE pin of the A4988
IPin	ms1Pin	The (optional) Meadow pin connected to the MS1 pin of the A4988
IPin	ms2Pin	The (optional) Meadow pin connected to the MS2 pin of the A4988
IPin	ms3Pin	The (optional) Meadow pin connected to the MS3 pin of the A4988

Remarks

You must provide either all of the micro-step (MS) lines or none of them

Properties

Direction

Sets or gets the direction of rotation used for Step or Rotate methods

Declaration

public RotationDirection Direction { get; set; }

Property Value

Type	Description
RotationDirection

Remarks

A4988
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

A4988 a4988;

public override Task Initialize()
{
    a4988 = new A4988(
        step: Device.Pins.D01,
        direction: Device.Pins.D00,
        ms1Pin: Device.Pins.D04,
        ms2Pin: Device.Pins.D03,
        ms3Pin: Device.Pins.D02);

    return base.Initialize();
}

public override Task Run()
{
    var stepDivisors = (StepDivisor[])Enum.GetValues(typeof(StepDivisor));
    while (true)
    {
        foreach (var step in stepDivisors)
        {
            for (var d = 2; d < 5; d++)
            {
                Resolver.Log.Info($"180 degrees..Speed divisor = {d}..1/{(int)step} Steps..{a4988.Direction}...");
                a4988.RotationSpeedDivisor = d;
                a4988.StepDivisor = step;
                a4988.Rotate(180);

                Thread.Sleep(500);
            }
        }
        a4988.Direction = (a4988.Direction == RotationDirection.Clockwise) ? RotationDirection.CounterClockwise : RotationDirection.Clockwise;
    }
}

Sample project(s) available on GitHub

Wiring Example

To wire a A4988 to your Meadow board, connect the following:

A4988	Meadow Pin
GND	GND
VCC	5V
STEP	D01
DIRECTION	D00
M1	D04
M2	D03
M3	D02

It should look like the following diagram:

RotationSpeedDivisor

Divisor used to adjust rotaional speed of the stepper motor

Declaration

public int RotationSpeedDivisor { get; set; }

Property Value

Type	Description
int

Remarks

A4988
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

A4988 a4988;

public override Task Initialize()
{
    a4988 = new A4988(
        step: Device.Pins.D01,
        direction: Device.Pins.D00,
        ms1Pin: Device.Pins.D04,
        ms2Pin: Device.Pins.D03,
        ms3Pin: Device.Pins.D02);

    return base.Initialize();
}

public override Task Run()
{
    var stepDivisors = (StepDivisor[])Enum.GetValues(typeof(StepDivisor));
    while (true)
    {
        foreach (var step in stepDivisors)
        {
            for (var d = 2; d < 5; d++)
            {
                Resolver.Log.Info($"180 degrees..Speed divisor = {d}..1/{(int)step} Steps..{a4988.Direction}...");
                a4988.RotationSpeedDivisor = d;
                a4988.StepDivisor = step;
                a4988.Rotate(180);

                Thread.Sleep(500);
            }
        }
        a4988.Direction = (a4988.Direction == RotationDirection.Clockwise) ? RotationDirection.CounterClockwise : RotationDirection.Clockwise;
    }
}

Sample project(s) available on GitHub

Wiring Example

To wire a A4988 to your Meadow board, connect the following:

A4988	Meadow Pin
GND	GND
VCC	5V
STEP	D01
DIRECTION	D00
M1	D04
M2	D03
M3	D02

It should look like the following diagram:

StepAngle

Gets or sets the angle, in degrees, of one step for the connected stepper motor

Declaration

public Angle StepAngle { get; set; }

Property Value

Type	Description
Angle

Remarks

A4988
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

A4988 a4988;

public override Task Initialize()
{
    a4988 = new A4988(
        step: Device.Pins.D01,
        direction: Device.Pins.D00,
        ms1Pin: Device.Pins.D04,
        ms2Pin: Device.Pins.D03,
        ms3Pin: Device.Pins.D02);

    return base.Initialize();
}

public override Task Run()
{
    var stepDivisors = (StepDivisor[])Enum.GetValues(typeof(StepDivisor));
    while (true)
    {
        foreach (var step in stepDivisors)
        {
            for (var d = 2; d < 5; d++)
            {
                Resolver.Log.Info($"180 degrees..Speed divisor = {d}..1/{(int)step} Steps..{a4988.Direction}...");
                a4988.RotationSpeedDivisor = d;
                a4988.StepDivisor = step;
                a4988.Rotate(180);

                Thread.Sleep(500);
            }
        }
        a4988.Direction = (a4988.Direction == RotationDirection.Clockwise) ? RotationDirection.CounterClockwise : RotationDirection.Clockwise;
    }
}

Sample project(s) available on GitHub

Wiring Example

To wire a A4988 to your Meadow board, connect the following:

A4988	Meadow Pin
GND	GND
VCC	5V
STEP	D01
DIRECTION	D00
M1	D04
M2	D03
M3	D02

It should look like the following diagram:

StepDivisor

Divisor for micro-stepping a motor
This requires the three micro-step control lines to be connected to the motor

Declaration

public StepDivisor StepDivisor { get; set; }

Property Value

Type	Description
StepDivisor

Remarks

A4988
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

A4988 a4988;

public override Task Initialize()
{
    a4988 = new A4988(
        step: Device.Pins.D01,
        direction: Device.Pins.D00,
        ms1Pin: Device.Pins.D04,
        ms2Pin: Device.Pins.D03,
        ms3Pin: Device.Pins.D02);

    return base.Initialize();
}

public override Task Run()
{
    var stepDivisors = (StepDivisor[])Enum.GetValues(typeof(StepDivisor));
    while (true)
    {
        foreach (var step in stepDivisors)
        {
            for (var d = 2; d < 5; d++)
            {
                Resolver.Log.Info($"180 degrees..Speed divisor = {d}..1/{(int)step} Steps..{a4988.Direction}...");
                a4988.RotationSpeedDivisor = d;
                a4988.StepDivisor = step;
                a4988.Rotate(180);

                Thread.Sleep(500);
            }
        }
        a4988.Direction = (a4988.Direction == RotationDirection.Clockwise) ? RotationDirection.CounterClockwise : RotationDirection.Clockwise;
    }
}

Sample project(s) available on GitHub

Wiring Example

To wire a A4988 to your Meadow board, connect the following:

A4988	Meadow Pin
GND	GND
VCC	5V
STEP	D01
DIRECTION	D00
M1	D04
M2	D03
M3	D02

It should look like the following diagram:

StepsPerRevolution

Gets the number of steps/micro-steps in the current configuration required for one 360-degree revolution

Declaration

public int StepsPerRevolution { get; }

Property Value

Type	Description
int

Remarks

A4988
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

A4988 a4988;

public override Task Initialize()
{
    a4988 = new A4988(
        step: Device.Pins.D01,
        direction: Device.Pins.D00,
        ms1Pin: Device.Pins.D04,
        ms2Pin: Device.Pins.D03,
        ms3Pin: Device.Pins.D02);

    return base.Initialize();
}

public override Task Run()
{
    var stepDivisors = (StepDivisor[])Enum.GetValues(typeof(StepDivisor));
    while (true)
    {
        foreach (var step in stepDivisors)
        {
            for (var d = 2; d < 5; d++)
            {
                Resolver.Log.Info($"180 degrees..Speed divisor = {d}..1/{(int)step} Steps..{a4988.Direction}...");
                a4988.RotationSpeedDivisor = d;
                a4988.StepDivisor = step;
                a4988.Rotate(180);

                Thread.Sleep(500);
            }
        }
        a4988.Direction = (a4988.Direction == RotationDirection.Clockwise) ? RotationDirection.CounterClockwise : RotationDirection.Clockwise;
    }
}

Sample project(s) available on GitHub

Wiring Example

To wire a A4988 to your Meadow board, connect the following:

A4988	Meadow Pin
GND	GND
VCC	5V
STEP	D01
DIRECTION	D00
M1	D04
M2	D03
M3	D02

It should look like the following diagram:

Methods

Rotate(float)

Rotates the stepper motor a specified number of degrees

Declaration

public void Rotate(float degrees)

Parameters

Type	Name	Description
float	degrees	Degrees to rotate

Remarks

A4988
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

A4988 a4988;

public override Task Initialize()
{
    a4988 = new A4988(
        step: Device.Pins.D01,
        direction: Device.Pins.D00,
        ms1Pin: Device.Pins.D04,
        ms2Pin: Device.Pins.D03,
        ms3Pin: Device.Pins.D02);

    return base.Initialize();
}

public override Task Run()
{
    var stepDivisors = (StepDivisor[])Enum.GetValues(typeof(StepDivisor));
    while (true)
    {
        foreach (var step in stepDivisors)
        {
            for (var d = 2; d < 5; d++)
            {
                Resolver.Log.Info($"180 degrees..Speed divisor = {d}..1/{(int)step} Steps..{a4988.Direction}...");
                a4988.RotationSpeedDivisor = d;
                a4988.StepDivisor = step;
                a4988.Rotate(180);

                Thread.Sleep(500);
            }
        }
        a4988.Direction = (a4988.Direction == RotationDirection.Clockwise) ? RotationDirection.CounterClockwise : RotationDirection.Clockwise;
    }
}

Sample project(s) available on GitHub

Wiring Example

To wire a A4988 to your Meadow board, connect the following:

A4988	Meadow Pin
GND	GND
VCC	5V
STEP	D01
DIRECTION	D00
M1	D04
M2	D03
M3	D02

It should look like the following diagram:

Rotate(float, RotationDirection)

Rotates the stepper motor a specified number of degrees

Declaration

public void Rotate(float degrees, RotationDirection direction)

Parameters

Type	Name	Description
float	degrees	Degrees to rotate
RotationDirection	direction	Direction of rotation

Remarks

A4988
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

A4988 a4988;

public override Task Initialize()
{
    a4988 = new A4988(
        step: Device.Pins.D01,
        direction: Device.Pins.D00,
        ms1Pin: Device.Pins.D04,
        ms2Pin: Device.Pins.D03,
        ms3Pin: Device.Pins.D02);

    return base.Initialize();
}

public override Task Run()
{
    var stepDivisors = (StepDivisor[])Enum.GetValues(typeof(StepDivisor));
    while (true)
    {
        foreach (var step in stepDivisors)
        {
            for (var d = 2; d < 5; d++)
            {
                Resolver.Log.Info($"180 degrees..Speed divisor = {d}..1/{(int)step} Steps..{a4988.Direction}...");
                a4988.RotationSpeedDivisor = d;
                a4988.StepDivisor = step;
                a4988.Rotate(180);

                Thread.Sleep(500);
            }
        }
        a4988.Direction = (a4988.Direction == RotationDirection.Clockwise) ? RotationDirection.CounterClockwise : RotationDirection.Clockwise;
    }
}

Sample project(s) available on GitHub

Wiring Example

To wire a A4988 to your Meadow board, connect the following:

A4988	Meadow Pin
GND	GND
VCC	5V
STEP	D01
DIRECTION	D00
M1	D04
M2	D03
M3	D02

It should look like the following diagram:

Step(int)

Rotates the stepper motor a specified number of steps (or microsteps)

Declaration

public void Step(int count)

Parameters

Type	Name	Description
int	count	Number of steps to rotate

Remarks

A4988
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

A4988 a4988;

public override Task Initialize()
{
    a4988 = new A4988(
        step: Device.Pins.D01,
        direction: Device.Pins.D00,
        ms1Pin: Device.Pins.D04,
        ms2Pin: Device.Pins.D03,
        ms3Pin: Device.Pins.D02);

    return base.Initialize();
}

public override Task Run()
{
    var stepDivisors = (StepDivisor[])Enum.GetValues(typeof(StepDivisor));
    while (true)
    {
        foreach (var step in stepDivisors)
        {
            for (var d = 2; d < 5; d++)
            {
                Resolver.Log.Info($"180 degrees..Speed divisor = {d}..1/{(int)step} Steps..{a4988.Direction}...");
                a4988.RotationSpeedDivisor = d;
                a4988.StepDivisor = step;
                a4988.Rotate(180);

                Thread.Sleep(500);
            }
        }
        a4988.Direction = (a4988.Direction == RotationDirection.Clockwise) ? RotationDirection.CounterClockwise : RotationDirection.Clockwise;
    }
}

Sample project(s) available on GitHub

Wiring Example

To wire a A4988 to your Meadow board, connect the following:

A4988	Meadow Pin
GND	GND
VCC	5V
STEP	D01
DIRECTION	D00
M1	D04
M2	D03
M3	D02

It should look like the following diagram:

Step(int, RotationDirection)

Rotates the stepper motor a specified number of steps (or microsteps)

Declaration

public void Step(int count, RotationDirection direction)

Parameters

Type	Name	Description
int	count	Number of steps to rotate
RotationDirection	direction	Direction of rotation

Remarks

A4988
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

A4988 a4988;

public override Task Initialize()
{
    a4988 = new A4988(
        step: Device.Pins.D01,
        direction: Device.Pins.D00,
        ms1Pin: Device.Pins.D04,
        ms2Pin: Device.Pins.D03,
        ms3Pin: Device.Pins.D02);

    return base.Initialize();
}

public override Task Run()
{
    var stepDivisors = (StepDivisor[])Enum.GetValues(typeof(StepDivisor));
    while (true)
    {
        foreach (var step in stepDivisors)
        {
            for (var d = 2; d < 5; d++)
            {
                Resolver.Log.Info($"180 degrees..Speed divisor = {d}..1/{(int)step} Steps..{a4988.Direction}...");
                a4988.RotationSpeedDivisor = d;
                a4988.StepDivisor = step;
                a4988.Rotate(180);

                Thread.Sleep(500);
            }
        }
        a4988.Direction = (a4988.Direction == RotationDirection.Clockwise) ? RotationDirection.CounterClockwise : RotationDirection.Clockwise;
    }
}

Sample project(s) available on GitHub

Wiring Example

To wire a A4988 to your Meadow board, connect the following:

A4988	Meadow Pin
GND	GND
VCC	5V
STEP	D01
DIRECTION	D00
M1	D04
M2	D03
M3	D02

It should look like the following diagram: