Sound

CARME-M4 Sound controller. More...

Collaboration diagram for Sound:

Files
file	cs42l51.h
	CS42L51 codec support functions.
file	cs42l51.c
	CS42L51 codec support functions.

Macros
#define	CODEC_I2C   CARME_I2C_AUDIO
#define	CODEC_I2S   SPI2
#define	CODEC_I2S_EXT   I2S2ext
#define	CODEC_I2S_CLK   RCC_APB1Periph_SPI2
#define	CODEC_ADDRESS   0x94
#define	CHIP_ID   0x01
#define	POWER_CONTROL   0x02
#define	MIC_POWER_AND_SPEED   0x03
#define	INTERFACE_CONTROL   0x04
#define	MIC_CONTROL   0x05
#define	ADC_CONTROL   0x06
#define	ADC_CONFIGURE   0x07
#define	DAC_OUTPUT_CONTROL   0x08
#define	DAC_CONTROL   0x09
#define	ALCA_AND_PGAA_CONTROL   0x0A
#define	ALCB_AND_PGAB_CONTROL   0x0B
#define	ADCX_ATTENUATOR   0x0D
#define	ADCX_MIXER_VOLUME_CONTROL   0x0F
#define	PCMA_MIXER_VOLUME_CONTROL   0x10
#define	PCMB_MIXER_VOLUME_CONTROL   0x11
#define	BEEP_FREQUENCY_AND_TIMING   0x12
#define	BEEP_OFF_TIME_AND_VOLUME   0x13
#define	BEEP_AND_TONE_CONFIGURATION   0x14
#define	TONE_CONTROL   0x15
#define	AOUTA_VOLUME_CONTROL   0x16
#define	AOUTB_VOLUME_CONTROL   0x17
#define	PCM_CHANNEL_MIXER   0x18
#define	LIMITER_THRESHOLD   0x19
#define	LIMITER_RELEASE   0x1A
#define	LIMITER_ATTACK   0x1B
#define	ALC_ENABLE_AND_ATTACK   0x1C
#define	ALC_RELEASE   0x1D
#define	ALC_THRESHOLD   0x1E
#define	NOISE_GATE   0x1F
#define	STATUS_REGISTER   0x20
#define	CHARGE_PUMP_FREQUENCY   0x21

Functions
uint8_t	CS42L51_Init (int8_t Volume)
	Codec CS42L51 low-layer and register initialization. More...
uint8_t	CS42L51_Status (void)
	Get the status of the cs42l51 codec. More...
void	CS42L51_VolumeOutCtrl (int8_t Volume)
	Codec CS42L51 output volume control. More...
void	CS42L51_Mute (uint8_t on)
	Mute the CS42L51 output. More...
void	CS42L51_CtrlInterface_Init (void)
	Codec CS42L51 ctrl line configuration and register initialization. More...
void	CS42L51_AudioInterface_Init (void)
	Codec CS42L51 audio line configuration. More...
void	CS42L51_WriteReg (uint8_t reg, uint8_t data)
	Write a byte to a register of the cs42l51 codec. More...
uint8_t	CS42L51_ReadReg (uint8_t reg)
	Read a byte from a register of the cs42l51 codec. More...

Detailed Description

CARME-M4 Sound controller.

Macro Definition Documentation

#define ADC_CONFIGURE   0x07

Cmd ADC cfg

Definition at line 92 of file cs42l51.h.

#define ADC_CONTROL   0x06

Cmd ADC ctrl

Definition at line 91 of file cs42l51.h.

#define ADCX_ATTENUATOR   0x0D

Cmd ADCx attenuator

Definition at line 97 of file cs42l51.h.

#define ADCX_MIXER_VOLUME_CONTROL   0x0F

Cmd ADCx mixer volume ctrl

Definition at line 98 of file cs42l51.h.

#define ALC_ENABLE_AND_ATTACK   0x1C

Cmd ALC enable and attack

Definition at line 111 of file cs42l51.h.

#define ALC_RELEASE   0x1D

Cmd ALC release

Definition at line 112 of file cs42l51.h.

#define ALC_THRESHOLD   0x1E

Cmd ALC threshold

Definition at line 113 of file cs42l51.h.

#define ALCA_AND_PGAA_CONTROL   0x0A

Cmd ALCA and PGAA ctrl

Definition at line 95 of file cs42l51.h.

#define ALCB_AND_PGAB_CONTROL   0x0B

Cmd ALCB and PGAB ctrl

Definition at line 96 of file cs42l51.h.

#define AOUTA_VOLUME_CONTROL   0x16

Cmd AOutA vol ctrl

Definition at line 105 of file cs42l51.h.

#define AOUTB_VOLUME_CONTROL   0x17

Cmd AOutB vol ctrl

Definition at line 106 of file cs42l51.h.

#define BEEP_AND_TONE_CONFIGURATION   0x14

Cmd Beep and tone cfg

Definition at line 103 of file cs42l51.h.

#define BEEP_FREQUENCY_AND_TIMING   0x12

Cmd Beep freq and timing

Definition at line 101 of file cs42l51.h.

#define BEEP_OFF_TIME_AND_VOLUME   0x13

Cmd Beep off time and vol

Definition at line 102 of file cs42l51.h.

#define CHARGE_PUMP_FREQUENCY   0x21

Cmd Charge pump freq

Definition at line 116 of file cs42l51.h.

#define CHIP_ID   0x01

Cmd Chip ID

Definition at line 86 of file cs42l51.h.

#define CODEC_ADDRESS   0x94

I2C address of codec

Definition at line 84 of file cs42l51.h.

#define CODEC_I2C   CARME_I2C_AUDIO

I2C bus to codec

Definition at line 80 of file cs42l51.h.

#define CODEC_I2S   SPI2

I2S bus to codec

Definition at line 81 of file cs42l51.h.

#define CODEC_I2S_CLK   RCC_APB1Periph_SPI2

I2S RCC

Definition at line 83 of file cs42l51.h.

#define CODEC_I2S_EXT   I2S2ext

I2Sext to codec

Definition at line 82 of file cs42l51.h.

#define DAC_CONTROL   0x09

Cmd DAC ctrl

Definition at line 94 of file cs42l51.h.

#define DAC_OUTPUT_CONTROL   0x08

Cmd DAC output ctrl

Definition at line 93 of file cs42l51.h.

#define INTERFACE_CONTROL   0x04

Cmd Interface ctrl

Definition at line 89 of file cs42l51.h.

#define LIMITER_ATTACK   0x1B

Cmd Limiter attack

Definition at line 110 of file cs42l51.h.

#define LIMITER_RELEASE   0x1A

Cmd Limiter release

Definition at line 109 of file cs42l51.h.

#define LIMITER_THRESHOLD   0x19

Cmd Limiter threshold

Definition at line 108 of file cs42l51.h.

#define MIC_CONTROL   0x05

Cmd Mic ctrl

Definition at line 90 of file cs42l51.h.

#define MIC_POWER_AND_SPEED   0x03

Cmd Mic power and speed

Definition at line 88 of file cs42l51.h.

#define NOISE_GATE   0x1F

Cmd Noise gate

Definition at line 114 of file cs42l51.h.

#define PCM_CHANNEL_MIXER   0x18

Cmd PCM channel mixer

Definition at line 107 of file cs42l51.h.

#define PCMA_MIXER_VOLUME_CONTROL   0x10

Cmd PCMA mixer volume ctrl

Definition at line 99 of file cs42l51.h.

#define PCMB_MIXER_VOLUME_CONTROL   0x11

Cmd PCMB mixer volume ctrl

Definition at line 100 of file cs42l51.h.

#define POWER_CONTROL   0x02

Cmd Power ctrl

Definition at line 87 of file cs42l51.h.

#define STATUS_REGISTER   0x20

Cmd Status register

Definition at line 115 of file cs42l51.h.

#define TONE_CONTROL   0x15

Cmd Tone ctrl

Definition at line 104 of file cs42l51.h.

Function Documentation

void CS42L51_AudioInterface_Init

(

void

)

Codec CS42L51 audio line configuration.

Returns

None

Definition at line 275 of file cs42l51.c.

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void CS42L51_CtrlInterface_Init

(

void

)

Codec CS42L51 ctrl line configuration and register initialization.

Returns

None

Definition at line 263 of file cs42l51.c.

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uint8_t CS42L51_Init

(

int8_t

Volume

)

Codec CS42L51 low-layer and register initialization.

Parameters

[in]

Volume

CS42L51_VolumeOutCtrl.

Returns

1 if no codec is found, else 0.

Set mic power and speed

• Select single speed mode (4-50 kHz)

Configure the interface

• DAC and ADC interface is I2S

Set mic control

Set ADC control configuration

• Enable the high-pass filter

Set the ADC configuration

• Select the line in as source

Set DAC output configuration

• HP Gain is 0.6047

Set DAC configuration

• Data selection is 00 for PCM or 01 for signal processing engine
• Soft ramp

Set PCMx mixer volume

• mute the mixer channel

Set PCM channel mixer AOUTA = Channel L AOUTB = Channel R ADCA = Channel L ADCB = Channel R

Set limiter threshold

• Maximum threshold = 0 dB
• Cushion threshold = 0 dB

Limiter release rate

• Disabled
• Both channel
• slowest release

Limiter attack rate

• fastest attack

Enable periodic beep sound

• On time: 5.2 s
• Off time: 5.2 s
• Frequency: 260.87 Hz (C4)
• Volume: +12 dB
• Repeat beep

Definition at line 133 of file cs42l51.c.

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void CS42L51_Mute

(

uint8_t

on

)

Mute the CS42L51 output.

Parameters

[in]

on

if 0 the codec will unmute the output, else it will mute it.

Returns

None

Definition at line 369 of file cs42l51.c.

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uint8_t CS42L51_ReadReg

(

uint8_t

reg

)

Read a byte from a register of the cs42l51 codec.

Parameters

[in]

reg

Register address to read

Returns

Data

Definition at line 117 of file cs42l51.c.

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uint8_t CS42L51_Status

(

void

)

Get the status of the cs42l51 codec.

Returns

Status register

Definition at line 315 of file cs42l51.c.

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void CS42L51_VolumeOutCtrl

(

int8_t

Volume

)

Codec CS42L51 output volume control.

Parameters

[in]

Volume

Binary code volume setting 0001 1000 +12.0 dB ... ... 0000 0000 0.0 dB 1111 1111 -0.5 dB 1111 1110 -1.0 dB ... ... 0011 0100 -102 dB ... ... 0001 1001 -102 dB

Returns

None

Definition at line 337 of file cs42l51.c.

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void CS42L51_WriteReg	(	uint8_t	reg,
		uint8_t	data
	)

Write a byte to a register of the cs42l51 codec.

Parameters

[in]	reg	Register address to write
[in]	data	Data

Returns

None

Definition at line 104 of file cs42l51.c.

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