[参考译文] TLV320ADC3140：在 I2S 从模式下、在双通道求和模式下、右通道始终保持静音

admin

请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

https://e2e.ti.com/support/audio-group/audio/f/audio-forum/1052436/tlv320adc3140-right-channel-always-silent-in-i2s-slave-mode-with-2-channel-summation-mode

器件型号：TLV320ADC3140

您好！

我们的布局如下所示：

在嵌入式系统(无 Linux)中运行。我们按如下方式配置 ADC：

    // wake up device
    TLV320WriteRegister(TLV320_SLEEP_CFG, TLV320_SLEEP_CFG_AREG_SELECT | TLV320_SLEEP_CFG_WAKE);
    // wait for at least 1 ms to allow the device to complete the internal wake-up sequence
    Cy_SysLib_Delay(1);

    // set up asi i2s mode
    TLV320WriteRegister(TLV320_ASI_CFG0, (TLV320_ASI_CFG0_FORMAT_I2S |
                                          TLV320_ASI_CFG0_FORMAT_WLEN_32));

    // set up channels
    TLV320WriteRegister(TLV320_CH1_CFG0, TLV320_CH_CFG0_LINE_INPUT | TLV320_CH_CFG0_IMP_10);
    TLV320WriteRegister(TLV320_CH2_CFG0, TLV320_CH_CFG0_LINE_INPUT | TLV320_CH_CFG0_IMP_10);
    TLV320WriteRegister(TLV320_CH3_CFG0, TLV320_CH_CFG0_LINE_INPUT | TLV320_CH_CFG0_IMP_10);
    TLV320WriteRegister(TLV320_CH4_CFG0, TLV320_CH_CFG0_LINE_INPUT | TLV320_CH_CFG0_IMP_10);

    TLV320WriteRegister(TLV320_DSP_CFG0, (TLV320_DSP_CFG0_CH_SUM_2_CHAN |
                                          TLV320_DSP_CFG0_CH_HPF_12HZ));

    TLV320WriteRegister(TLV320_DSP_CFG1, TLV320_DSP_CFG1_BIQUADS_DISABLE);

    TLV320WriteRegister(TLV320_ASI_CH2, TLV320_ASI_CH2_SLOT_2);
    TLV320WriteRegister(TLV320_ASI_CH3, TLV320_ASI_CH3_SLOT_1);

    TLV320WriteRegister(TLV320_GPIO_CFG0,  TLV320_GPIO_CFG0_GPIO1_DIS);

    // enable input channels
    TLV320WriteRegister(TLV320_IN_CH_EN, (TLV320_IN_CH_EN_CH1_EN |
                                          TLV320_IN_CH_EN_CH2_EN |
                                          TLV320_IN_CH_EN_CH3_EN |
                                          TLV320_IN_CH_EN_CH4_EN));

    // enable output channels
    TLV320WriteRegister(TLV320_ASI_OUT_CH_EN, (TLV320_ASI_OUT_CH_EN_CH1_EN |
                                               TLV320_ASI_OUT_CH_EN_CH3_EN));

    // power up adc
    TLV320WriteRegister(TLV320_PWR_CFG, (TLV320_PWR_CFG_ADC_EN |
                                         TLV320_PWR_CFG_PLL_EN |
                                         TLV320_PWR_CFG_DYN_CH_PUPD_EN |
                                         TLV320_PWR_CFG_DYN_CH_1_4));

其中定义为：

#define TLV320_PAGE_CFG 0x00
#define TLV320_SW_RESET 0x01
#define TLV320_SLEEP_CFG 0x02
#define TLV320_SLEEP_CFG_AREG_SELECT 0x80
#define TLV320_SLEEP_CFG_WAKE 0x01
#define TLV320_SHDN_CFG 0x05
#define TLV320_ASI_CFG0 0x07
#define TLV320_ASI_CFG0_FORMAT_I2S 0x40
#define TLV320_ASI_CFG0_FORMAT_WLEN_32 0x30
#define TLV320_ASI_CH2 0x0c
#define TLV320_ASI_CH2_SLOT_2 0x02
#define TLV320_ASI_CH3 0x0d
#define TLV320_ASI_CH3_SLOT_1 0x01
#define TLV320_GPIO_CFG0 0x21
#define TLV320_GPIO_CFG0_GPIO1_DIS 0x00
#define TLV320_CH1_CFG0 0x3c
#define TLV320_CH2_CFG0 0x41
#define TLV320_CH3_CFG0 0x46
#define TLV320_CH4_CFG0 0x4b
#define TLV320_CH_CFG0_LINE_INPUT 0x80
#define TLV320_CH_CFG0_IMP_10 0x04
#define TLV320_DSP_CFG0 0x6b
#define TLV320_DSP_CFG0_CH_SUM_2_CHAN 0x04
#define TLV320_DSP_CFG0_CH_HPF_12HZ 0x01
#define TLV320_DSP_CFG1 0x6c
#define TLV320_DSP_CFG1_BIQUADS_DISABLE 0x00
#define TLV320_IN_CH_EN 0x73
#define TLV320_IN_CH_EN_CH1_EN 0x80
#define TLV320_IN_CH_EN_CH2_EN 0x40
#define TLV320_IN_CH_EN_CH3_EN 0x20
#define TLV320_IN_CH_EN_CH4_EN 0x10
#define TLV320_ASI_OUT_CH_EN 0x74
#define TLV320_ASI_OUT_CH_EN_CH1_EN 0x80
#define TLV320_ASI_OUT_CH_EN_CH2_EN 0x40
#define TLV320_ASI_OUT_CH_EN_CH3_EN 0x20
#define TLV320_ASI_OUT_CH_EN_CH4_EN 0x10
#define TLV320_PWR_CFG 0x75
#define TLV320_PWR_CFG_ADC_EN 0x40
#define TLV320_PWR_CFG_PLL_EN 0x20
#define TLV320_PWR_CFG_DYN_CH_PUPD_EN 0x10
#define TLV320_PWR_CFG_DYN_CH_1_4 0x04

我们尝试了很多不同的东西、但正确的通道始终是静默的(I2S 上只发送零)。

是否有任何关于该问题可能是什么的建议？

4 年多前