Remarks

Pca9685
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Pca9685 pca9685;

public override Task Initialize()
{
    Resolver.Log.Info("Initialize...");
    var i2CBus = Device.CreateI2cBus(I2cBusSpeed.FastPlus);

    pca9685 = new Pca9685(i2CBus, new Meadow.Units.Frequency(50, Meadow.Units.Frequency.UnitType.Hertz), (byte)Pca9685.Addresses.Default);
    pca9685.Initialize();

    return base.Initialize();
}

public override Task Run()
{
    var port0 = pca9685.CreatePwmPort(0, 0.05f);
    var port7 = pca9685.CreatePwmPort(7);

    port0.Start();
    port7.Start();

    return base.Run();
}

Sample project(s) available on GitHub

Wiring Example

To wire a PCA9685 to your Meadow board, connect the following:

Characteristic	Locus
Inheritance	System.Object > Pca9685
Namespace	Meadow.Foundation.ICs.IOExpanders
Assembly	Pca9685.dll

Syntax

public class Pca9685 : object

Constructors

Pca9685(II2cBus, Frequency, Byte)

Create a new Pca9685 object

Declaration

public Pca9685(II2cBus i2cBus, Frequency frequency, byte address = null)

Parameters

Type	Name	Description
II2cBus	i2cBus	The I2C bus connected to the peripheral
Frequency	frequency	The frequency
System.Byte	address	The I2C address

Pca9685(II2cBus, Byte)

Create a new Pca9685 object

Declaration

public Pca9685(II2cBus i2cBus, byte address = null)

Parameters

Type	Name	Description
II2cBus	i2cBus	The I2C bus connected to the peripheral
System.Byte	address	The I2C address

Properties

i2CBus

The I2C bus connected to the pca9685

Declaration

protected II2cBus i2CBus { get; set; }

Property Value

Type	Description
II2cBus

Methods

CreatePwmPort(Byte, Single)

Create a IPwmPort on the specified pin

Declaration

public virtual IPwmPort CreatePwmPort(byte portNumber, float dutyCycle = 0.5F)

Parameters

Type	Name	Description
System.Byte	portNumber	The port number (0-15)
System.Single	dutyCycle	The duty cycle for that port

Returns

Type	Description
IPwmPort	IPwmPort

Initialize()

Initializes the PCA9685 IC

Declaration

public virtual void Initialize()

SetPin(Byte, Boolean)

Turns the specified pin On or Off

Declaration

public virtual void SetPin(byte pin, bool on)

Parameters

Type	Name	Description
System.Byte	pin	The pin to set
System.Boolean	on	true is on, false if off

SetPwm(Byte, Int32, Int32)

Set the values for specified output pin.

Declaration

public virtual void SetPwm(byte pin, int on, int off)

Parameters

Type	Name	Description
System.Byte	pin	The pwm Pin
System.Int32	on	LED{X}_ON_L and LED{X}_ON_H registier value
System.Int32	off	LED{X}_OFF_L and LED{X}_OFF_H registier value

Remarks

On parameter is an inverted pwm signal