TDA7440D audioprocessors¶

group tda74xx

ESP-IDF driver for TDA7439/TDA7439DS/TDA7440 audioprocessors.

MIT Licensed as described in the file LICENSE

Defines

TDA74XX_ADDR¶: I2C address.

TDA74XX_MAX_INPUT¶: Maximum input number.

TDA74XX_MIN_VOLUME¶: Mute volume level, dB.

TDA74XX_MAX_VOLUME¶: Maximum colume level, dB.

TDA74XX_MAX_INPUT_GAIN¶: Maximum input gain, dB.

TDA74XX_MIN_EQ_GAIN¶: Minimum equalizer gain, dB.

TDA74XX_MAX_EQ_GAIN¶: Maximum equalizer gain, dB.

TDA74XX_MAX_ATTEN¶: Maximum speaker attenuation level, dB.

Enums

enum tda74xx_channel_t¶

Audio channel.

Values:

enumerator TDA74XX_CHANNEL_LEFT¶

enumerator TDA74XX_CHANNEL_RIGHT¶

enum tda74xx_band_t¶

Equalizer band.

Values:

enumerator TDA74XX_BAND_BASS¶

enumerator TDA74XX_BAND_MIDDLE¶: Not supported on TDA7440.

enumerator TDA74XX_BAND_TREBLE¶

Functions

esp_err_t tda74xx_init_desc(i2c_dev_t *dev, i2c_port_t port, gpio_num_t sda_gpio, gpio_num_t scl_gpio)¶

Initialize device descriptor.

Parameters

dev – Device descriptor
port – I2C port number
sda_gpio – GPIO pin number for SDA
scl_gpio – GPIO pin number for SCL

Returns

ESP_OK on success

esp_err_t tda74xx_free_desc(i2c_dev_t *dev)¶

Free device descriptor.

Parameters: dev – Device descriptor
Returns: ESP_OK on success

esp_err_t tda74xx_set_input(i2c_dev_t *dev, uint8_t input)¶

Switch input.

Parameters

dev – Device descriptor
input – Input #, 0..3

Returns

ESP_OK on success

esp_err_t tda74xx_get_input(i2c_dev_t *dev, uint8_t *input)¶

Get current input.

Parameters

dev – Device descriptor
[out] input – Input #, 0..3

Returns

ESP_OK on success

esp_err_t tda74xx_set_input_gain(i2c_dev_t *dev, uint8_t gain_db)¶

Set input gain, dB.

Parameters

dev – Device descriptor
gain_db – Gain, 0..30 dB

Returns

ESP_OK on success

esp_err_t tda74xx_get_input_gain(i2c_dev_t *dev, uint8_t *gain_db)¶

Get input gain.

Parameters

dev – Device descriptor
[out] gain_db – Gain, 0..30 dB

Returns

ESP_OK on success

esp_err_t tda74xx_set_volume(i2c_dev_t *dev, int8_t volume_db)¶

Set master volume.

Parameters

dev – Device descriptor
volume_db – Volume, -48..0 dB

Returns

ESP_OK on success

esp_err_t tda74xx_get_volume(i2c_dev_t *dev, int8_t *volume_db)¶

Get master volume.

Parameters

dev – Device descriptor
[out] volume_db – Volume, -48..0 dB

Returns

ESP_OK on success

esp_err_t tda74xx_set_equalizer_gain(i2c_dev_t *dev, tda74xx_band_t band, int8_t gain_db)¶

Set equalizer gain.

Parameters

dev – Device descriptor
band – Band
gain_db – Gain, -14..14 dB in 2 dB step

Returns

ESP_OK on success

esp_err_t tda74xx_get_equalizer_gain(i2c_dev_t *dev, tda74xx_band_t band, int8_t *gain_db)¶

Get equalizer gain.

Parameters

dev – Device descriptor
band – Band
[out] gain_db – Gain, -14..14 dB in 2 dB step

Returns

ESP_OK on success

esp_err_t tda74xx_set_speaker_attenuation(i2c_dev_t *dev, tda74xx_channel_t channel, uint8_t atten_db)¶

Attenuate speaker.

Parameters

dev – Device descriptor
channel – Audio channel
atten_db – Attenuation, 0..56 dB

Returns

ESP_OK on success

esp_err_t tda74xx_get_speaker_attenuation(i2c_dev_t *dev, tda74xx_channel_t channel, uint8_t *atten_db)¶

Get speaker attenuation.

Parameters

dev – Device descriptor
channel – Audio channel
[out] atten_db – Attenuation, 0..56 dB

Returns

ESP_OK on success