PCM1690 TDM8 模式不出声音-TI中文支持网

PCM1690接收的信号是从DSP给出的TDM8，用示波器测量信号，MCLK :24.576MHz,BCLK:12.288MHz，LRCLK:48KHz， DATA 线上也能看到音乐的波形；在PCM1690输出端没有量到输出信号。请帮忙看一下，谢谢！

TDM时的配置

PCM1690 初始化如下：

void Pcm1690_Init(void)

{ DAC_MSG("\r\n Pcm1690_Init!\r\n");

PCM1690_RST(OUTPUT_LOW);

HAL_DelayMs(10);

PCM1690_RST(OUTPUT_HIGH);

HAL_DelayMs(10);

//Pcm1690Write_i2c(0x40,0xc0);//use default

Pcm1690Write_i2c(0x41,0x86);//disable power save , tmd i2s

//Pcm1690Write_i2c(0x42,0x00);//use default DAC power save and roll-off

//Pcm1690Write_i2c(0x43,0x00);//use default DAC normal or inverted

//Pcm1690Write_i2c(0x44,0x00);//use default soft mute each channel

//Pcm1690Write_i2c(0x45,0x00);//use default zero flag

Pcm1690Write_i2c(0x46,0x02);//DAMS(BIT7)=0

//0x47 no use

Pcm1690Write_i2c(0x48,0xff);//DAC1 VOLUME 0xff: 0db 0x00 MUTE STEP 0.5db(DAMS=0) or 1db(DAMS=1)

Pcm1690Write_i2c(0x49,0xff);//DAC2 VOLUME 0xff: 0db 0x00 MUTE

Pcm1690Write_i2c(0x4A,0xff);//DAC3 VOLUME 0xff: 0db 0x00 MUTE

Pcm1690Write_i2c(0x4B,0xff);//DAC4 VOLUME 0xff: 0db 0x00 MUTE

Pcm1690Write_i2c(0x4C,0xff);//DAC5 VOLUME 0xff: 0db 0x00 MUTE

Pcm1690Write_i2c(0x4D,0xff);//DAC6 VOLUME 0xff: 0db 0x00 MUTE

Pcm1690Write_i2c(0x4E,0xff);//DAC7 VOLUME 0xff: 0db 0x00 MUTE

Pcm1690Write_i2c(0x4F,0xff);//DAC8 VOLUME 0xff: 0db 0x00 MUTE

}

DSP 配置如图：

将DSP 和PCM1690同时配置为I2S信号时是有输出的：

I2S时的配置：

PCM1690 初始化如下：

void Pcm1690_Init(void)

{ DAC_MSG("\r\n Pcm1690_Init!\r\n");

PCM1690_RST(OUTPUT_LOW);

HAL_DelayMs(10);

PCM1690_RST(OUTPUT_HIGH);

HAL_DelayMs(10);

//Pcm1690Write_i2c(0x40,0xc0);//use default

Pcm1690Write_i2c(0x41,0x80);//disable power save , i2s