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是否有 pin22 & pin24 接 Dmic Example?

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  • T
    tonyone0902 last edited by Feb 2, 2023, 7:29 AM

    40 pin HAT 那邊 pin22 & pin24 分別有 PDM CLK & PDM Data,請問如果在 ubuntu 環境下如何透過這兩個腳位直接擷取 Dmic 音訊呢?

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    • G
      george last edited by george Feb 2, 2023, 8:56 AM Feb 2, 2023, 8:42 AM

      • DTS is modified as follows
      diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-cp4.dts b/arch/arm64/boot/dts/rockchip/rk3588s-cp4.dts
      index dc232a407a8c..da9796bfe7a3 100755
      --- a/arch/arm64/boot/dts/rockchip/rk3588s-cp4.dts
      +++ b/arch/arm64/boot/dts/rockchip/rk3588s-cp4.dts
      @@ -223,6 +223,24 @@ codec {
                       };
               };
       
      +       pdmics: dummy-codec {
      +        status = "okay";
      +        compatible = "rockchip,dummy-codec";
      +        #sound-dai-cells = <0>;
      +    };
      +
      +    pdm_mic_array: pdm-mic-array {
      +        status = "okay";
      +        compatible = "simple-audio-card";
      +        simple-audio-card,name = "rockchip,pdm-mic-array";
      +        simple-audio-card,cpu {
      +            sound-dai = <&pdm1>;
      +        };
      +        simple-audio-card,codec {
      +            sound-dai = <&pdmics>;
      +        };
      +    };
      +       
              leds: leds {
                      compatible = "gpio-leds";
                      pinctrl-names = "default";
      @@ -944,6 +962,14 @@ &route_hdmi0 {
              status = "okay";
       };
       
      +&pdm1 {
      +    status = "okay";
      +    rockchip,path-map = <0 1 2 3>;
      +    #sound-dai-cells = <0>;
      +    pinctrl-names = "default";
      +    pinctrl-0 = <&pdm1m1_clk &pdm1m1_sdi1>;
      +};
      +
       &i2c0 {
              status = "okay";
              pinctrl-names = "default";
      @@ -1301,7 +1327,7 @@ ir_key1 {
       
       &spi0 {
              pinctrl-names = "default";
      -       status = "okay";
      +       status = "disabled";
       
              max-freq = <48000000>; /* spi internal clk, don't modify */
               spi_dev@0 {
      
      • Device information
      coolpi@Ubuntu:~$ arecord -l
      **** List of CAPTURE Hardware Devices ****
      card 2: rockchipes8316c [rockchip,es8316-codec], device 0: fe470000.i2s-ES8316 HiFi es8316.7-0010-0 [fe470000.i2s-ES8316 HiFi es8316.7-0010-0]
        Subdevices: 1/1
        Subdevice #0: subdevice #0
      card 3: rockchippdmmica [rockchip,pdm-mic-array], device 0: fe4c0000.pdm-dummy_codec dummy-codec-0 [fe4c0000.pdm-dummy_codec dummy-codec-0]
        Subdevices: 1/1
        Subdevice #0: subdevice #0
      
      T 1 Reply Last reply Feb 2, 2023, 2:34 PM Reply Quote 0
      • T
        tonyone0902 @george last edited by Feb 2, 2023, 2:34 PM

        @george

        Thanks!

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