Meadow.Foundation.ICs.IOExpanders.Pca9685

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:

Class Pca9685

Represents PCA9685 IC

Assembly: Pca9685.dll

View Source

Declaration

public class Pca9685 : II2cPeripheral

Implements:
Meadow.Hardware.II2cPeripheral

Properties

DefaultI2cAddress

The default I2C address for the peripheral

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Declaration

public byte DefaultI2cAddress { get; }

i2cBus

The I2C bus connected to the pca9685

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Declaration

protected II2cBus i2cBus { get; set; }

Fields

i2cComms

I2C Communication bus used to communicate with the peripheral

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Declaration

protected readonly II2cCommunications i2cComms

Methods

Initialize()

Initializes the PCA9685 IC

View Source

Declaration

public virtual void Initialize()

CreatePwmPort(byte, float)

Create a IPwmPort on the specified pin

View Source

Declaration

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

Returns

Meadow.Hardware.IPwmPort: IPwmPort

Parameters

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

SetPin(byte, bool)

Turns the specified pin On or Off

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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, int, int)

Set the values for specified output pin.

View Source

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 register value
System.Int32	off	LED{X}_OFF_L and LED{X}_OFF_H register value

Implements

• Meadow.Hardware.II2cPeripheral