aic3204-TI中文支持网

我想用aic3204的DSP模式，数据格式为mono，耳机的输出模式Mono Differential DAC to Mono Differential Headphone Output和Mono DAC and Analog Bypass Input to Mono Differential Headphone Output这两种模式有什么区别呢，下面是我的配置，在C5535的一个例子上改的，我将I2S配成了dsp模式，耳机有声音输出，但是用示波器看波形的时候，波形不对，我发的是一个正弦信号，走势大致正确。请问是什么原因呢，我现在不用AD，只用到了DA部分。

AIC3204_rset( 0, 0x00 ); // Select page 0
        AIC3204_rset( 1, 0x01 ); // Reset codec
        EZDSP5535_waitusec(1000); // Wait 1ms after reset
        AIC3204_rset( 0, 0x01 ); // Select page 1
        AIC3204_rset( 1, 0x08 ); // Disable crude AVDD generation from DVDD
        AIC3204_rset( 2, 0x01 ); // Enable Analog Blocks, use LDO power
        AIC3204_rset( 123,0×05 ); // Force reference to power up in 40ms
        EZDSP5535_waitusec(50000); // Wait at least 40ms
        AIC3204_rset( 0, 0x00 ); // Select page 0

        /* PLL and Clocks config and Power Up */
        AIC3204_rset( 27, 0x4d ); // BCLK and WCLK are set as o/p; AIC3204(Master)
        AIC3204_rset( 28, 0x01 ); // Data ofset = 0
        AIC3204_rset( 4, 0x03 ); // PLL setting: PLLCLK <- MCLK, CODEC_CLKIN <-PLL CLK
        AIC3204_rset( 6, 0x07 ); // PLL setting: J=7
        AIC3204_rset( 7, 0x06 ); // PLL setting: HI_BYTE(D=1680)
        AIC3204_rset( 8, 0x90 ); // PLL setting: LO_BYTE(D=1680)
        AIC3204_rset( 30, 0x88 ); // For 32 bit clocks per frame in Master mode ONLY
                                   // BCLK=DAC_CLK/N =(12288000/8) = 1.536MHz = 32*fs
        AIC3204_rset( 5, 0x91 ); // PLL setting: Power up PLL, P=1 and R=1
        EZDSP5535_waitusec(10000); // Wait for PLL to come up
        AIC3204_rset( 13, 0x00 ); // Hi_Byte(DOSR) for DOSR = 128 decimal or 0x0080 DAC oversamppling
        AIC3204_rset( 14, 0x80 ); // Lo_Byte(DOSR) for DOSR = 128 decimal or 0x0080
        AIC3204_rset( 20, 0x80 ); // AOSR for AOSR = 128 decimal or 0x0080 for decimation filters 1 to 6
        AIC3204_rset( 11, 0x82 ); // Power up NDAC and set NDAC value to 2
        AIC3204_rset( 12, 0x87 ); // Power up MDAC and set MDAC value to 7
        AIC3204_rset( 18, 0x87 ); // Power up NADC and set NADC value to 7
        AIC3204_rset( 19, 0x82 ); // Power up MADC and set MADC value to 2

        /* DAC ROUTING and Power Up */
        AIC3204_rset( 0, 0x01 ); // Select page 1
        //AIC3204_rset( 9, 0x30 );
        //AIC3204_rset( 10, 0x03 );      //#COMMON MODE CONTROL REGISTER Output of HP is powered by LDOIN
        //AIC3204_rset( 11, 0x10 );      //Over Current detection is enabled for HPL & HPR
        AIC3204_rset( 12, 0x08 ); // LDAC AFIR routed to HPL
        AIC3204_rset( 13, 0x10 ); // RDAC AFIR routed to HPR
        AIC3204_rset( 0, 0x00 ); // Select page 0
        AIC3204_rset( 64, 0x82 ); // Left vol=right vol
        AIC3204_rset( 65, 0x00 ); // Left DAC gain to 0dB VOL; Right tracks Left
        AIC3204_rset( 63, 0x90 ); // Power up left,right data paths and set channel
        AIC3204_rset( 0, 0x01 ); // Select page 1
        AIC3204_rset( 16, 0x3c ); // Unmute HPL , 0dB gain
        AIC3204_rset( 17, 0x3c ); // Unmute HPR , 0dB gain
        AIC3204_rset( 9 , 0x30 ); // Power up HPL,HPR
        EZDSP5535_waitusec(100 ); // Wait

希望得到帮助，谢谢！

Derek Xie：

Hi

这两种方法在配置上不太一样，其次就是Mono Differential DAC to Mono Differential Headphone Output配置完后就不能做一些混音，而Mono DAC and Analog Bypass Input to Mono Differential Headphone Output配置完后还可以做混音。

具体见下图：

还有就是看了你的配置发现你的时钟配置有点问题，下图是你们的配置的设置吗？