ESP32-S3 I2S APLL无法启用

[Wenjing]

想请教大家一下ESP32-S3在APLL 无法启用的情况下该如何正确配置I2S总线上的MEMS麦克风的参数，比如i2s_config 和i2s_set_clk。下面是我自己的代码但是无法正确运行。非常感谢！

Code: Untitled.cpp Select all

#define CONFIG_I2S_CH             I2S_NUM_0

#define CONFIG_SAMPLE_RATE        48000

#define CONFIG_BIT_SAMPLE         32 //bits

#define SAMPLE_T                  int32_t 

#define CONFIG_SAMPLES_SHORT     (CONFIG_SAMPLE_RATE / 8) // ~125ms 6000



#define CONFIG_SAMPLE_T          int32_t 

#define CONFIG_SAMPLES_LEQ       (CONFIG_SAMPLE_RATE * LEQ_PERIOD)

#define CONFIG_DMA_BANK_SIZE     (CONFIG_SAMPLES_SHORT / 16) //375

#define CONFIG_DMA_BANKS         32



#define CONFIG_I2S_WS_GPIO 4

#define CONFIG_I2S_CLK_GPIO 5

#define CONFIG_I2S_SD 13



extern "C" void init_microphone(void)

{

    // Set the I2S configuration as PDM and 32bits per sample

    i2s_config_t i2s_config = {

       

        mode :i2s_mode_t(I2S_MODE_MASTER| I2S_MODE_RX),

        .sample_rate = CONFIG_SAMPLE_RATE,

        .bits_per_sample = I2S_BITS_PER_SAMPLE_32BIT,

        .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,

        communication_format: i2s_comm_format_t(I2S_COMM_FORMAT_I2S | I2S_COMM_FORMAT_I2S_MSB),

        .intr_alloc_flags = ESP_INTR_FLAG_LEVEL1,

        .dma_buf_count = CONFIG_DMA_BANKS,

        .dma_buf_len = CONFIG_DMA_BANK_SIZE,

        .use_apll = 0,

        tx_desc_auto_clear: true,

        fixed_mclk: 0,

    };



    // Set the pinout configuration (set using menuconfig)

    i2s_pin_config_t pin_config = {

      

        .bck_io_num = CONFIG_I2S_CLK_GPIO,

        .ws_io_num = CONFIG_I2S_WS_GPIO,

        .data_out_num = I2S_PIN_NO_CHANGE,

        .data_in_num = CONFIG_I2S_SD,

    };



    

    // Call driver installation function before any I2S R/W operation.

    

    ESP_ERROR_CHECK( i2s_driver_install(CONFIG_I2S_CH, &i2s_config, 0, NULL) );

    ESP_ERROR_CHECK( i2s_set_pin(CONFIG_I2S_CH, &pin_config) );

    ESP_ERROR_CHECK( i2s_set_clk(CONFIG_I2S_CH, CONFIG_SAMPLE_RATE, I2S_BITS_PER_SAMPLE_32BIT, I2S_CHANNEL_MONO) );

}

[kaisey]

你为什么要用APLL呢

[Wenjing]

因为我不是很会配置sck和ws和ESP32的采样频率这些参数，然后就想用APLL会省事一些。我也参考了一些ESP32的库也是用的APLL，比如这个： https://github.com/ikostoski/esp32-i2s- ... 2s-slm.ino

[Wenjing]

<r>问题解决了，是我自己硬件线路接错了。。。抱歉占用了站里的资源
<CODEBOX codebox="c" file="Untitled.c"><s>

Code: Untitled.c Select all

</s>

extern "C" void init_microphone(void)<br/>

{<br/>

    <br/>

    i2s_config_t i2s_config = {<br/>

       <br/>

        mode :i2s_mode_t(I2S_MODE_MASTER| I2S_MODE_RX),<br/>

        .sample_rate = CONFIG_SAMPLE_RATE,<br/>

        .bits_per_sample = I2S_BITS_PER_SAMPLE_32BIT,<br/>

        .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,<br/>

        .communication_format = I2S_COMM_FORMAT_STAND_I2S,<br/>

        .intr_alloc_flags = ESP_INTR_FLAG_LEVEL1,<br/>

        .dma_buf_count = CONFIG_DMA_BANKS,<br/>

        .dma_buf_len = CONFIG_DMA_BANK_SIZE,<br/>

        .use_apll = 1,<br/>

        tx_desc_auto_clear: true,<br/>

        .fixed_mclk = 0,<br/>

    };<br/>

<br/>

    // Set the pinout configuration<br/>

    i2s_pin_config_t pin_config = {<br/>

      <br/>

        .bck_io_num = CONFIG_I2S_CLK_GPIO,<br/>

        .ws_io_num = CONFIG_I2S_WS_GPIO,<br/>

        .data_out_num = I2S_PIN_NO_CHANGE,<br/>

        .data_in_num = CONFIG_I2S_SD,<br/>

    };<br/>

<br/>

    <br/>

    // Call driver installation function before any I2S R/W operation.<br/>

    <br/>

    ESP_ERROR_CHECK( i2s_driver_install(CONFIG_I2S_CH, &i2s_config, 0, NULL) );<br/>

    ESP_ERROR_CHECK( i2s_set_pin(CONFIG_I2S_CH, &pin_config) );<e>

</e></CODEBOX></r>

[kaisey]

ESP32-S3没有APLL吧，数据手册里都写了没有APLL，