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.

Return

ESP_OK on success

Parameters

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

esp_err_t tda74xx_free_desc(i2c_dev_t *dev)¶

Free device descriptor.

Return

ESP_OK on success

Parameters

dev: Device descriptor

esp_err_t tda74xx_set_input(i2c_dev_t *dev, uint8_t input)¶

Switch input.

Return

ESP_OK on success

Parameters

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

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

Get current input.

Return

ESP_OK on success

Parameters

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

esp_err_t tda74xx_set_input_gain(i2c_dev_t *dev, uint8_t gain_db)¶

Set input gain, dB.

Return

ESP_OK on success

Parameters

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

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

Get input gain.

Return

ESP_OK on success

Parameters

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

esp_err_t tda74xx_set_volume(i2c_dev_t *dev, int8_t volume_db)¶

Set master volume.

Return

ESP_OK on success

Parameters

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

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

Get master volume.

Return

ESP_OK on success

Parameters

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

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

Set equalizer gain.

Return

ESP_OK on success

Parameters

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

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

Get equalizer gain.

Return

ESP_OK on success

Parameters

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

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

Attenuate speaker.

Return

ESP_OK on success

Parameters

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

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

Get speaker attenuation.

Return

ESP_OK on success

Parameters

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