Remarks

Is31fl3731
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Is31fl3731 iS31FL3731;

public override Task Initialize()
{
    Resolver.Log.Info("Initialize...");
    iS31FL3731 = new Is31fl3731(Device.CreateI2cBus());
    iS31FL3731.Initialize();

    return base.Initialize();
}

public override Task Run()
{
    iS31FL3731.ClearAllFrames();
    iS31FL3731.SetFrame(frame: 0);
    iS31FL3731.DisplayFrame(frame: 0);

    //Turn on all LEDs in frame
    for (byte i = 0; i <= 144; i++)
    {
        iS31FL3731.SetLedPwm(
            frame: 0,
            ledIndex: i,
            brightness: 128);

        Thread.Sleep(50);
    }

    return base.Run();
}

Sample project(s) available on GitHub

Wiring Example

To wire a Is31fl3731 to your Meadow board, connect the following:

Characteristic	Locus
Inheritance	System.Object > Is31fl3731
Namespace	Meadow.Foundation.ICs.IOExpanders
Assembly	Is31fl3731.dll

Syntax

public class Is31fl3731 : object

Constructors

Is31fl3731(II2cBus, Byte)

Creaete a new Is31fl3731 object

Declaration

public Is31fl3731(II2cBus i2cBus, byte address = null)

Parameters

Type	Name	Description
II2cBus	i2cBus	The I2C bus
System.Byte	address	The I2C address

Properties

Frame

The current frame

Declaration

public byte Frame { get; }

Property Value

Type	Description
System.Byte

Methods

Clear()

Turn off all LEDs for the specified frame

Declaration

public virtual void Clear()

Clear(Byte)

Turn off all LEDs for the specified frame

Declaration

public virtual void Clear(byte frame)

Parameters

Type	Name	Description
System.Byte	frame	the frame to clear

ClearAllFrames()

Turn off all LEDs

Declaration

public virtual void ClearAllFrames()

DisplayFrame(Byte)

Display the specified frame

Declaration

public virtual void DisplayFrame(byte frame)

Parameters

Type	Name	Description
System.Byte	frame	The frame number. 0-7

Initialize()

Initialize the IS31FL3731 by shutting it down, turning it back on and setting it to Picture mode.

Declaration

public void Initialize()

SelectPage(Byte)

Select the page/frame

Declaration

protected virtual void SelectPage(byte page)

Parameters

Type	Name	Description
System.Byte	page	page/frame #

SetBlinkFunctionOnAllLeds(Boolean)

Blink all LEDs for the current frame. Blink Mode muse be enabled

Declaration

public virtual void SetBlinkFunctionOnAllLeds(bool on)

Parameters

Type	Name	Description
System.Boolean	on	true = on, false = off

SetBlinkFunctionOnAllLeds(Byte, Boolean)

Blink all the LEDs for the specified frame

Declaration

public virtual void SetBlinkFunctionOnAllLeds(byte frame, bool on)

Parameters

Type	Name	Description
System.Byte	frame	frame #
System.Boolean	on	true = on, false = off

SetBlinkMode(Boolean, Byte)

Enable/disable blink mode

Declaration

public virtual void SetBlinkMode(bool enabled, byte period)

Parameters

Type	Name	Description
System.Boolean	enabled	true = on, false = off
System.Byte	period	the blink duration

SetFrame(Byte)

Sets the current frame.

Declaration

public virtual void SetFrame(byte frame)

Parameters

Type	Name	Description
System.Byte	frame	The frame number. 0-7

SetLedPwm(Byte, Byte)

Set the PWM value for the specified LED

Declaration

public virtual void SetLedPwm(byte ledIndex, byte pwm)

Parameters

Type	Name	Description
System.Byte	ledIndex	The LED number
System.Byte	pwm	The pwm value 0-255

SetLedPwm(Byte, Byte, Byte)

Set the PWM value for the specified LED

Declaration

public virtual void SetLedPwm(byte frame, byte ledIndex, byte brightness)

Parameters

Type	Name	Description
System.Byte	frame	Frame number. 0-7
System.Byte	ledIndex	The LED number. 0-144
System.Byte	brightness	The pwm value 0-255

SetLedState(Boolean)

Set the LED state for all LED's in the current Frame

Declaration

public virtual void SetLedState(bool on)

Parameters

Type	Name	Description
System.Boolean	on	true = on, false = off

SetLedState(Byte, Boolean)

Sets the state for all LEDs for the specified frame

Declaration

public virtual void SetLedState(byte frame, bool on)

Parameters

Type	Name	Description
System.Byte	frame
System.Boolean	on	true = on, false = off

WriteRegister(Byte, Byte)

Write to the current frame register

Declaration

protected virtual void WriteRegister(byte register, byte data)

Parameters

Type	Name	Description
System.Byte	register	Register to write to
System.Byte	data	The data value

WriteRegister(Byte, Byte, Byte)

Write a value to a register

Declaration

protected virtual void WriteRegister(byte frame, byte register, byte data)

Parameters

Type	Name	Description
System.Byte	frame	The frame
System.Byte	register	Register to write to
System.Byte	data	The data value