【HC32F460开发板测评】05 wm8731通过耳机播放音乐

1nnocent

【HC32F460开发板测评】05 wm8731通过耳机播放音乐 [复制链接]

本帖最后由 1nnocent 于 2021-4-21 14:55 编辑

HC32F460开发板的AUDIO是比较感兴趣的一个功能，这次来大概看一看。

AUDIO
EVB 配置 1 个 Audio Codec 芯片 WM8731SEDS 和 Audio PA 芯片 BL6281，并提供一个板载
MIC、 3.5mm 耳机接口和 Line in 接口以及一个喇叭接口，以实现录音以及音频输入和输出功
能。
MCU I2S 接口时钟可以通过更改电阻来切换，如下所示：

I2S_CLK	R141	R54	R143	R55	R30
I2S_EXCK(default)	33	100	DNP	DNP	0
I2S_MCK	DNP	DNP	33	100	DNP

WM8731是一款Codec芯片， WM 8731带有集成耳机驱动器的低功率立体声编解码器，提供了立体声线和单麦克风电平音频输入，以及静音功能、可编程线型音量控制和适合驻极体型麦克风的偏压输出。

BL6281是一款 AB类音频功率放大器用于驱动1.1W8Ω喇叭。

一开始看的是配套的历程，在I2C的例程里面可以找到，例程i2s_record_wm8731_exck_dma的功能是，录取音乐或麦克风的音频信号，将其存储，再通过DMA和I2S使用耳机或者喇叭播放出来，比较麻烦，所以先只单独试一下wm8731这个芯片，单独使用wm8731的话程序就比较简单，配置一下相关寄存器就好了。

一下是使用i2s_record_wm8731_exck_dma历程改的程序（程序就只剩下wm8731的配置，配置完就可以播放音频信号（J12输入音频信号），通过耳机J11可以听到音乐）：

audio.c

/******************************************************************************/
/** \file audio.c
 **
 ** \brief Audio functions
 **
 **   - 2021-04-15  1.0  First version for Audio
 **
 ******************************************************************************/

/*******************************************************************************
 * Include files
 ******************************************************************************/
#include "hc32_ddl.h"
#include "wm8731.h"
#include "audio.h"
#include "i2c.h"

/*******************************************************************************
 * Local type definitions ('typedef')
 ******************************************************************************/

/*******************************************************************************
 * Local pre-processor symbols/macros ('#define')
 ******************************************************************************/
#define RECORDER_WAVFILELEN         (15u*1024u)

/*******************************************************************************
 * Global variable definitions (declared in header file with 'extern')
 ******************************************************************************/
extern uint16_t *pu16SoundData;
extern uint16_t au16RecorderSoundI2s[RECORDER_WAVFILELEN];

/*******************************************************************************
 * Local function prototypes ('static')
 ******************************************************************************/
 
/**
 *******************************************************************************
 ** \brief  Configuration Codec to record wav file
 **
 ** \param  None
 **
 ** \retval None
 **
 ******************************************************************************/
void WM8731_CodecConfigRecord(void)
{
    stc_wm8731_reg_t stcWm8731Reg;
    MEM_ZERO_STRUCT(stcWm8731Reg);
    /* Config codec */
    /* Reset register */
    stcWm8731Reg.RESET              = 0x00u;    // Reset WM8731
    /* Left & right line input */
    stcWm8731Reg.LLIN_f.LINVOL      = 0x17;    // Left channel line input volume: 0dB--0x17u
    stcWm8731Reg.LLIN_f.LINMUTE     = 0u;       // Enable left channel line input mute
    stcWm8731Reg.LLIN_f.LRINBOTH    = 0u;       // Disable simultaneous input volume and mute load from left to right
    stcWm8731Reg.RLIN_f.RINVOL      = 0x17;    // Right channel line input volume 0dB
    stcWm8731Reg.RLIN_f.RINMUTE     = 0u;       // Enable right channel line input mute
    stcWm8731Reg.RLIN_f.RINBOTH     = 0u;       // Disable simultaneous input volume and mute load from right to left
    /* Left & right headphone output */
    stcWm8731Reg.LHOUT_f.LHPVOL     = 0x5Fu;    // Set volume of left headphone to 0dB. 0x30(-73dB) ~ 0x7F(+6dB), 0 ~ 0x2F: mute
    stcWm8731Reg.LHOUT_f.LZCEN      = 0u;       // Disable left channel zero cross detect
    stcWm8731Reg.LHOUT_f.LRHPBOTH   = 0u;       // Disable simultaneous output volume and mute load from left to right
    stcWm8731Reg.RHOUT_f.RHPVOL     = 0x5Fu;    // Set volume of right headphone to 0dB. 0x30(-73dB) ~ 0x7F(+6dB), 0 ~ 0x2F: mute
    stcWm8731Reg.RHOUT_f.RZCEN      = 0u;       // Enable right channel zero cross detect
    stcWm8731Reg.RHOUT_f.RLHPBOTH   = 0u;       // Disable simultaneous output volume and mute load from right to left
    /* Analog audio path control */
#if(RECORD_MIC)
    stcWm8731Reg.AAPC_f.MICBOOST    = 1u;       // Disable boost, 0: disable 1: enable
    stcWm8731Reg.AAPC_f.MUTEMIC     = 0u;       // Enable mute to ADC
    stcWm8731Reg.AAPC_f.INSEL       = 1u;       // Line input select to ADC, 0: linein  1: mic
    stcWm8731Reg.AAPC_f.BYPASS      = 1u;       // Enbale bypass 0: disable 1:enable
    stcWm8731Reg.AAPC_f.DACSEL      = 0u;       // Select DAC
    stcWm8731Reg.AAPC_f.SIDETONE    = 0u;       // Disable side tone 0: disable 1:enable
    stcWm8731Reg.AAPC_f.SIDEATT     = 0u;       // 0: -6dB, 1: -12dB, 2: -9dB, 3: -15dB.
#else
    stcWm8731Reg.AAPC_f.MICBOOST    = 0u;       // Disable boost, 0: disable 1: enable
    stcWm8731Reg.AAPC_f.MUTEMIC     = 1u;       // Enable mute to ADC
    stcWm8731Reg.AAPC_f.INSEL       = 0u;       // Line input select to ADC, 0: linein  1: mic
    stcWm8731Reg.AAPC_f.BYPASS      = 1u;       // Enbale bypass 0: disable 1:enable
    stcWm8731Reg.AAPC_f.DACSEL      = 0u;       // Select DAC
    stcWm8731Reg.AAPC_f.SIDETONE    = 0u;       // Disable side tone 0: disable 1:enable
    stcWm8731Reg.AAPC_f.SIDEATT     = 0u;       // 0: -6dB, 1: -12dB, 2: -9dB, 3: -15dB.
#endif
    /* Digital audio path control */
    stcWm8731Reg.DAPC_f.ADCHPD      = 0u;       // Enable high pass filter
    stcWm8731Reg.DAPC_f.DEEMP       = 0u;       // De-emphasis contrl. 0: disable, 1: 32kHz, 2: 44.1kHz, 3: 48kHz
    stcWm8731Reg.DAPC_f.DACMU       = 0u;       // 0:Disable soft mute   1: Enable soft mute
    stcWm8731Reg.DAPC_f.HPOR        = 0u;       // Clear offset when high pass
    /* Power down control */
    stcWm8731Reg.PDC_f.LINEINPD     = 0u;       // Disable line input power down
    stcWm8731Reg.PDC_f.MICPD        = 0u;       // Disable microphone input power down
    stcWm8731Reg.PDC_f.ADCPD        = 0u;       // Disable ADC power down
    stcWm8731Reg.PDC_f.DACPD        = 0u;       // Disable DAC power down
    stcWm8731Reg.PDC_f.OUTPD        = 0u;       // Disable output power down
    stcWm8731Reg.PDC_f.OSCPD        = 0u;       // Disable oscillator power down
    stcWm8731Reg.PDC_f.CLKOUTPD     = 0u;       // Disable CLKOUT power down
    stcWm8731Reg.PDC_f.POWEROFF     = 0u;       // Disable power off mode
    /* Digital audio interface format */
    stcWm8731Reg.DAIF_f.FORMAT      = 2u;       // 0: MSB-First, right justified, 1: MSB-first, left justified, 2: I2S-format, 3: DSP mode
    stcWm8731Reg.DAIF_f.IWL         = 0u;       // 0: 16 bits, 1: 20 bits, 2: 24 bits, 3: 32 bits
    stcWm8731Reg.DAIF_f.LRP         = 0u;       // 1: right channel DAC data when DACLRC (WS) is high,  0: right channel DAC data when DACLRC (WS) is low
    stcWm8731Reg.DAIF_f.LRSWAP      = 0u;       // 1: swap left channel and right channel, 0: don't swap
    stcWm8731Reg.DAIF_f.MS          = 0u;       // 1: Enable master mode, 0: Enable slave mode
    stcWm8731Reg.DAIF_f.BCLKINV     = 0u;       // Don't invert BCLK
    /* Sampling control */
    stcWm8731Reg.SC_f.NORMAL_USB    = 0u;       // 0: normal mode, 1: USB mode
    stcWm8731Reg.SC_f.BOSR          = 0u;       // Nomrmal mode: 0: 256fs, 1: 384fs
                                                // USB mode: 0: 250fs, 1:272fs
    stcWm8731Reg.SC_f.SR            = 2u;       // Sample rate setting
    stcWm8731Reg.SC_f.CLKDIV2       = 0u;       // 0: core clock is MCLK, 1: core clock is MCLK divided by 2
    stcWm8731Reg.SC_f.CLKODIV2      = 0u;       // 0: output clock is core clock, 1: core clock is core clock/2
    // Active control
    stcWm8731Reg.AC_f.ACTIVE        = 1u;       // 0: inactive, 1: active

    WM8731_Init(I2C_CH, &stcWm8731Reg);

    WM8731_SetHpVolume(I2C_CH, 0x7Fu,0x7Fu);    //0x2F-MUTE ~ 0x7F Maximum
}

/**
 *******************************************************************************
 ** \brief  Configuration Codec to play wav file
 **
 ** \param  None
 **
 ** \retval None
 **
 ******************************************************************************/
void WM8731_CodecConfigPlay(void)
{
    stc_wm8731_reg_t stcWm8731Reg;
    MEM_ZERO_STRUCT(stcWm8731Reg);
    /* Config codec */
    /* Reset register */
    stcWm8731Reg.RESET              = 0x00u;    // Reset WM8731
    /* Left & right line input */
    stcWm8731Reg.LLIN_f.LINVOL      = 0x00u;    // Left channel line input volume: 0dB--0x17u
    stcWm8731Reg.LLIN_f.LINMUTE     = 1u;       // Enable left channel line input mute
    stcWm8731Reg.LLIN_f.LRINBOTH    = 0u;       // Disable simultaneous input volume and mute load from left to right
    stcWm8731Reg.RLIN_f.RINVOL      = 0x00u;    // Right channel line input volume 0dB
    stcWm8731Reg.RLIN_f.RINMUTE     = 1u;       // Enable right channel line input mute
    stcWm8731Reg.RLIN_f.RINBOTH     = 0u;       // Disable simultaneous input volume and mute load from right to left
    /* Left & right headphone output */
    stcWm8731Reg.LHOUT_f.LHPVOL     = 0x5Fu;    // Set volume of left headphone to 0dB. 0x30(-73dB) ~ 0x7F(+6dB), 0 ~ 0x2F: mute
    stcWm8731Reg.LHOUT_f.LZCEN      = 0u;       // Disable left channel zero cross detect
    stcWm8731Reg.LHOUT_f.LRHPBOTH   = 0u;       // Disable simultaneous output volume and mute load from left to right
    stcWm8731Reg.RHOUT_f.RHPVOL     = 0x5Fu;    // Set volume of right headphone to 0dB. 0x30(-73dB) ~ 0x7F(+6dB), 0 ~ 0x2F: mute
    stcWm8731Reg.RHOUT_f.RZCEN      = 0u;       // Enable right channel zero cross detect
    stcWm8731Reg.RHOUT_f.RLHPBOTH   = 0u;       // Disable simultaneous output volume and mute load from right to left
    /* Analog audio path control */
    stcWm8731Reg.AAPC_f.MICBOOST    = 0u;       // Disable boost
    stcWm8731Reg.AAPC_f.MUTEMIC     = 1u;       // Enable mute to ADC
    stcWm8731Reg.AAPC_f.INSEL       = 0u;       // Line input select to ADC
    stcWm8731Reg.AAPC_f.BYPASS      = 0u;       // Enbale bypass
    stcWm8731Reg.AAPC_f.DACSEL      = 1u;       // Select DAC
    stcWm8731Reg.AAPC_f.SIDETONE    = 0u;       // Disable side tone
    stcWm8731Reg.AAPC_f.SIDEATT     = 0u;       // 0: -6dB, 1: -12dB, 2: -9dB, 3: -15dB.
    /* Digital audio path control */
    stcWm8731Reg.DAPC_f.ADCHPD      = 0u;       // Enable high pass filter
    stcWm8731Reg.DAPC_f.DEEMP       = 3u;       // De-emphasis contrl. 0: disable, 1: 32kHz, 2: 44.1kHz, 3: 48kHz
    stcWm8731Reg.DAPC_f.DACMU       = 0u;       // 0:Disable soft mute   1: Enable soft mute
    stcWm8731Reg.DAPC_f.HPOR        = 0u;       // Clear offset when high pass
    /* Power down control */
    stcWm8731Reg.PDC_f.LINEINPD     = 0u;       // Disable line input power down
    stcWm8731Reg.PDC_f.MICPD        = 0u;       // Disable microphone input power down
    stcWm8731Reg.PDC_f.ADCPD        = 0u;       // Disable ADC power down
    stcWm8731Reg.PDC_f.DACPD        = 0u;       // Disable DAC power down
    stcWm8731Reg.PDC_f.OUTPD        = 0u;       // Disable output power down
    stcWm8731Reg.PDC_f.OSCPD        = 0u;       // Disable oscillator power down
    stcWm8731Reg.PDC_f.CLKOUTPD     = 0u;       // Disable CLKOUT power down
    stcWm8731Reg.PDC_f.POWEROFF     = 0u;       // Disable power off mode
    /* Digital audio interface format */
    stcWm8731Reg.DAIF_f.FORMAT      = 2u;       // 0: MSB-First, right justified, 1: MSB-first, left justified, 2: I2S-format, 3: DSP mode
    stcWm8731Reg.DAIF_f.IWL         = 0u;       // 0: 16 bits, 1: 20 bits, 2: 24 bits, 3: 32 bits
    stcWm8731Reg.DAIF_f.LRP         = 0u;       // 1: right channel DAC data when DACLRC (WS) is high,  0: right channel DAC data when DACLRC (WS) is low
    stcWm8731Reg.DAIF_f.LRSWAP      = 0u;       // 1: swap left channel and right channel, 0: don't swap
    stcWm8731Reg.DAIF_f.MS          = 0u;       // 1: Enable master mode, 0: Enable slave mode
    stcWm8731Reg.DAIF_f.BCLKINV     = 0u;       // Don't invert BCLK
    /* Sampling control */
    stcWm8731Reg.SC_f.NORMAL_USB    = 0u;       // 0: normal mode, 1: USB mode
    stcWm8731Reg.SC_f.BOSR          = 0u;       // Nomrmal mode: 0: 256fs, 1: 384fs
                                                // USB mode: 0: 250fs, 1:272fs
    stcWm8731Reg.SC_f.SR            = 1u;       // Sample rate setting
    stcWm8731Reg.SC_f.CLKDIV2       = 0u;       // 0: core clock is MCLK, 1: core clock is MCLK divided by 2
    stcWm8731Reg.SC_f.CLKODIV2      = 0u;       // 0: output clock is core clock, 1: core clock is core clock/2
    // Active control
    stcWm8731Reg.AC_f.ACTIVE        = 1u;       // 0: inactive, 1: active

    WM8731_Init(I2C_CH, &stcWm8731Reg);

    WM8731_SetHpVolume(I2C_CH, 0x7Fu,0x7Fu);    //0x2F-MUTE ~ 0x7F Maximum
}

/**
 *******************************************************************************
 ** \brief  Configuration Codec to play wav file
 **
 ** \param  None
 **
 ** \retval None
 **
 ******************************************************************************/
void SpeakerInit(void)
{
	stc_port_init_t stcPortIni;
#if(SPEAKER_ON)
	/* Initialize SPK_EN port for speaker */
	MEM_ZERO_STRUCT(stcPortIni);
	stcPortIni.enPinMode = Pin_Mode_Out;
	PORT_Init(SPK_EN_PORT, SPK_EN_PIN, &stcPortIni);
	SPEAKER_EN();
#endif
//	/* Prepare buffer for store recoder data */
//	pu16SoundData = &au16RecorderSoundI2s[0];
}

/*******************************************************************************
 * Local variable definitions ('static')
 ******************************************************************************/

/*******************************************************************************
 * Function implementation - global ('extern') and local ('static')
 ******************************************************************************/

/*******************************************************************************
 * EOF (not truncated)
 ******************************************************************************/

audio.h

/******************************************************************************/
/** \file audio.h
 **
 ** A detailed description is available at
 ** [url=home.php?mod=space&uid=43623]@link[/url] audio Series description @endlink
 **
 **   - 2021-4-15  1.0  First version for Audio Series Functions description
 **     Library.
 **
 ******************************************************************************/
#ifndef __AUDIO_H__
#define __AUDIO_H__

/*******************************************************************************
 * Include files
 ******************************************************************************/
#include "hc32_common.h"
 
/*******************************************************************************
 * Local pre-processor symbols/macros ('#define')
 ******************************************************************************/
/* Define if need play by speaker*/
#define SPEAKER_ON                  (true)
	
/* Select Record source */
//#define RECORD_MIC                  (true)

#define SPK_EN_PORT                 (PortB)
#define SPK_EN_PIN                  (Pin00)

#define SPEAKER_EN()                (PORT_SetBits(SPK_EN_PORT, SPK_EN_PIN))
#define SPEAKER_DISEN()             (PORT_ResetBits(SPK_EN_PORT, SPK_EN_PIN))
	
//#define RECORDER_WAVFILELEN         (15u*1024u)

///*******************************************************************************
// * Local variable definitions ('static')
// ******************************************************************************/
//uint16_t *pu16SoundData=NULL;
//uint16_t au16RecorderSoundI2s[RECORDER_WAVFILELEN];
//uint8_t u8RecordEndFlag = 0u;
//uint32_t u32Count = 0ul;


void WM8731_CodecConfigRecord(void);
void WM8731_CodecConfigPlay(void);
void SpeakerInit(void);
 
#endif /* __AUDIO_H__ */

/*******************************************************************************
 * End of file
 ******************************************************************************/

i2c.c

/******************************************************************************/
/** \file I2C.c
 **
 ** \brief I2C functions
 **
 **   - 2021-04-15  1.0  First version for I2C
 **
 ******************************************************************************/

/*******************************************************************************
 * Include files
 ******************************************************************************/
#include "hc32_ddl.h"
#include "i2c.h"

/*******************************************************************************
 * Local type definitions ('typedef')
 ******************************************************************************/

/*******************************************************************************
 * Local pre-processor symbols/macros ('#define')
 ******************************************************************************/

/*******************************************************************************
 * Global variable definitions (declared in header file with 'extern')
 ******************************************************************************/

/*******************************************************************************
 * Local function prototypes ('static')
 ******************************************************************************/
void i2cInit()
{
	/* Initialize i2c port for codec wm8731 */
	PORT_SetFunc(I2C2_SCL_PORT, I2C2_SCL_PIN, Func_I2c2_Scl, Disable);
	PORT_SetFunc(I2C2_SDA_PORT, I2C2_SDA_PIN, Func_I2c2_Sda, Disable);
	/* Enable I2C Peripheral*/
	PWC_Fcg1PeriphClockCmd(PWC_FCG1_PERIPH_I2C2, Enable);
}

/*******************************************************************************
 * Local variable definitions ('static')
 ******************************************************************************/

/*******************************************************************************
 * Function implementation - global ('extern') and local ('static')
 ******************************************************************************/

/*******************************************************************************
 * EOF (not truncated)
 ******************************************************************************/

i2c.h

/******************************************************************************/
/** \file i2c.h
 **
 ** A detailed description is available at
 ** @link i2c Series description @endlink
 **
 **   - 2021-4-15  1.0  First version for i2c Series Functions description
 **     Library.
 **
 ******************************************************************************/
#ifndef __I2C_H__
#define __I2C_H__

/*******************************************************************************
 * Include files
 ******************************************************************************/
 
 /*******************************************************************************
 * Local pre-processor symbols/macros ('#define')
 ******************************************************************************/
/* Define I2C unit used for the example */
#define I2C_CH                      (M4_I2C2)
/* Define port and pin for SDA and SCL */
#define I2C2_SCL_PORT               (PortD)
#define I2C2_SCL_PIN                (Pin00)
#define I2C2_SDA_PORT               (PortD)
#define I2C2_SDA_PIN                (Pin01)

void i2cInit(void);
 
 
#endif /* __I2C_H__ */

/*******************************************************************************
 * End of file
 ******************************************************************************/

wm8731.c以及相应的头文件这里不再给出，这两个文件和例程里的是一样的。

单独wm8731代码：

hc32f460petb_template_wm8731_V1.0.rar (5 MB, 下载次数: 8)

下面这个代码和例程i2s_record_wm8731_exck_dma功能一样，但是使用空历程文件改的，看起来会比历程的简洁一些：

hc32f460petb_template_wm8731_V1.0.rar (5 MB, 下载次数: 8)