Meadow.Foundation.Audio.Radio.Tea5767

Tea5767
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The TEA5767 FM module is based on the TEA5767GH which is a single-chip, electronically tuned, FM stereo radio for low-voltage applications with fully integrated Intermediate Frequency (IF) selectivity and demodulation.

The TEA5767 is controlled via I2C. It comes with two 1/4" jacks, one for connection to a headphone/speaker and one to connect an antenna (often sold with the module).

Code Example

Tea5767 radio;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    radio = new Tea5767(Device.CreateI2cBus());

    return Task.CompletedTask;
}

public async override Task Run()
{
    //scan through available stations
    for (int i = 0; i < 8; i++)
    {
        await Task.Delay(1000);

        radio.SearchNextSilent();

        Resolver.Log.Info($"Current frequency: {radio.GetFrequency()}");
    }

    //set a known station
    radio.SelectFrequency(new Frequency(94.5, Frequency.UnitType.Megahertz));
}

Sample project(s) available on GitHub

Wiring Example

To wire a TEA5767 to your Meadow board, connect the following:

TEA5767	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

Class Tea5767

Represents a TEA5767 radio

Assembly: Tea5767.dll

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Declaration

public class Tea5767 : II2cPeripheral

Implements:
Meadow.Hardware.II2cPeripheral

Properties

IsMuted

Is the audio muted

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Declaration

public bool IsMuted { get; set; }

DefaultI2cAddress

The default I2C address for the peripheral

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Declaration

public byte DefaultI2cAddress { get; }

Fields

i2cComms

I2C Communication bus used to communicate with the peripheral

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Declaration

protected readonly II2cCommunications i2cComms

Methods

Mute()

Mute audio if not muted

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Declaration

public void Mute()

SelectFrequency(Frequency)

Select radio frequency

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Declaration

public void SelectFrequency(Frequency frequency)

Parameters

Type	Name	Description
Meadow.Units.Frequency	frequency	the frequency

GetFrequency()

Get the current radio frequency

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Declaration

public Frequency GetFrequency()

Returns

Meadow.Units.Frequency

SearchNextSilent()

Search to next station and mute while seeking

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Declaration

public bool SearchNextSilent()

Returns

System.Boolean

SearchNext()

Search to next station

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Declaration

public bool SearchNext()

Returns

System.Boolean

SearchFromBeginningMuted()

Start searching for station from lowest frequency (87Mhz)

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Declaration

public bool SearchFromBeginningMuted()

Returns

System.Boolean: true if station found### SearchFromEndMuted() Start searching for station from highest frequency (108Mhz)

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Declaration

public bool SearchFromEndMuted()

Returns

System.Boolean

StartSearchFromBeginning()

Start searching for station from lowest frequency (87Mhz)

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Declaration

public bool StartSearchFromBeginning()

Returns

System.Boolean: true if station found### StartSearchFromEnd() Start searching for station from highest frequency (108Mhz)

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Declaration

public bool StartSearchFromEnd()

Returns

System.Boolean

GetSignalLevel()

Get Signal Level

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Declaration

public byte GetSignalLevel()

Returns

System.Byte: level as a byte (0-255)### IsStereo() Is the current station stereo

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Declaration

public bool IsStereo()

Returns

System.Boolean

IsReady()

Is the radio ready for operation

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Declaration

public bool IsReady()

Returns

System.Boolean

IsSearchUp()

Is search mode up

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Declaration

public bool IsSearchUp()

Returns

System.Boolean

IsSearchDown()

Is search mode down

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Declaration

public bool IsSearchDown()

Returns

System.Boolean

IsStandby()

Is the radio in standby mode

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Declaration

public bool IsStandby()

Returns

System.Boolean

EnableStereo(bool)

Enable stereo if set to mono

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Declaration

public void EnableStereo(bool enable)

Parameters

Type	Name
System.Boolean	enable

SetSoftMuteOn()

Enable soft mute

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Declaration

public void SetSoftMuteOn()

SetSoftMuteOff()

Turn soft mute off if enabled

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Declaration

public void SetSoftMuteOff()

MuteRight()

Mute the right channel

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Declaration

public void MuteRight()

UnmuteRight()

Unmute the right channel

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Declaration

public void UnmuteRight()

MuteLeft()

Mute the left channel

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Declaration

public void MuteLeft()

UnmuteLeft()

Unmute the left channel

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Declaration

public void UnmuteLeft()

EnableStandby(bool)

Enable standby mode

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Declaration

public void EnableStandby(bool enable)

Parameters

Type	Name
System.Boolean	enable

SetHighCutControlOn()

Enable high cut control

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Declaration

public void SetHighCutControlOn()

SetHighCutControlOff()

Disable high cut control

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Declaration

public void SetHighCutControlOff()

SetStereoNoiseCancellingOn()

Enable stereo noise canceling

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Declaration

public void SetStereoNoiseCancellingOn()

SetStereoNoiseCancellingOff()

Disable stereo noise canceling

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Declaration

public void SetStereoNoiseCancellingOff()

Implements

• Meadow.Hardware.II2cPeripheral