tda74xx - Driver for TDA7439/TDA7439DS/TDA7440D audioprocessors¶
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group
tda74xx
ESP-IDF driver for TDA7439/TDA7439DS/TDA7440 audioprocessors.
Copyright (C) 2018, 2020 Ruslan V. Uss unclerus@gmail.com
MIT Licensed as described in the file LICENSE
Defines
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TDA74XX_ADDR
¶ I2C address.
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TDA74XX_MAX_INPUT
¶ Maximum input number.
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TDA74XX_MIN_VOLUME
¶ Mute volume level, dB.
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TDA74XX_MAX_VOLUME
¶ Maximum colume level, dB.
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TDA74XX_MAX_INPUT_GAIN
¶ Maximum input gain, dB.
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TDA74XX_MIN_EQ_GAIN
¶ Minimum equalizer gain, dB.
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TDA74XX_MAX_EQ_GAIN
¶ Maximum equalizer gain, dB.
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TDA74XX_MAX_ATTEN
¶ Maximum speaker attenuation level, dB.
Enums
Functions
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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
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esp_err_t
tda74xx_free_desc
(i2c_dev_t *dev)¶ Free device descriptor.
- Parameters
dev – Device descriptor
- Returns
ESP_OK
on success
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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