https://community.nxp.com/t5/MCX-Microcontrollers/evk-mimxrt685-dsp-%E8%BE%93%E5%87%BA%E7%9A%84pcm%E4%BF%9D%E5%AD%98%E5%88%B0buff/m-p/2338078#M5072 <P>使用evk-mimxrt685 开发板 需要将dsp输出的pcm数据保存到mcu侧的buff中，这个需求，应该参考哪个样例？其中携带的dsp是否能满足此需求。</P><P>拿到的pcm数据，需要从喇叭中播出，参考哪个样例？</P><P>感谢回答。</P> Tue, 24 Mar 2026 03:41:06 GMT wei-z8 2026-03-24T03:41:06Z https://community.nxp.com/t5/MCX-Microcontrollers/evk-mimxrt685-dsp-%E8%BE%93%E5%87%BA%E7%9A%84pcm%E4%BF%9D%E5%AD%98%E5%88%B0buff/m-p/2338078#M5072 <P>使用evk-mimxrt685 开发板 需要将dsp输出的pcm数据保存到mcu侧的buff中，这个需求，应该参考哪个样例？其中携带的dsp是否能满足此需求。</P><P>拿到的pcm数据，需要从喇叭中播出，参考哪个样例？</P><P>感谢回答。</P> Tue, 24 Mar 2026 03:41:06 GMT https://community.nxp.com/t5/MCX-Microcontrollers/evk-mimxrt685-dsp-%E8%BE%93%E5%87%BA%E7%9A%84pcm%E4%BF%9D%E5%AD%98%E5%88%B0buff/m-p/2338078#M5072 wei-z8 2026-03-24T03:41:06Z https://community.nxp.com/t5/MCX-Microcontrollers/evk-mimxrt685-dsp-%E8%BE%93%E5%87%BA%E7%9A%84pcm%E4%BF%9D%E5%AD%98%E5%88%B0buff/m-p/2338137#M5073 <P>Hi&nbsp;<a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/260963">@wei-z8</a>&nbsp;,</P> <P>可以参考dsp_mu_polling这个工程，把PCM 放在共享 SRAM，通知CM33获取。播放PCM数据可以查看SDK中dmic相关示例工程。另外，这个帖子中有客户做过类似的实现，你可以参考一下：<A href="https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/Microphone-Data-Capture-Processing-and-Output-via-Line-out-with/m-p/2179427" target="_blank">https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/Microphone-Data-Capture-Processing-and-Output-via-Line-out-with/m-p/2179427</A></P> <P>Best regards,<BR />Gavin</P> <P>&nbsp;</P> Tue, 24 Mar 2026 06:07:01 GMT https://community.nxp.com/t5/MCX-Microcontrollers/evk-mimxrt685-dsp-%E8%BE%93%E5%87%BA%E7%9A%84pcm%E4%BF%9D%E5%AD%98%E5%88%B0buff/m-p/2338137#M5073 Gavin_Jia 2026-03-24T06:07:01Z https://community.nxp.com/t5/MCX-Microcontrollers/evk-mimxrt685-dsp-%E8%BE%93%E5%87%BA%E7%9A%84pcm%E4%BF%9D%E5%AD%98%E5%88%B0buff/m-p/2339004#M5093 我目前拿不到dsp的ide，还有dsp sdk，无法进行DSP侧的开发，你们目前样例里边携带的dsp固件，能支持我拿到pcm数据不？<BR /> Wed, 25 Mar 2026 06:41:29 GMT https://community.nxp.com/t5/MCX-Microcontrollers/evk-mimxrt685-dsp-%E8%BE%93%E5%87%BA%E7%9A%84pcm%E4%BF%9D%E5%AD%98%E5%88%B0buff/m-p/2339004#M5093 wei-z8 2026-03-25T06:41:29Z https://community.nxp.com/t5/MCX-Microcontrollers/evk-mimxrt685-dsp-%E8%BE%93%E5%87%BA%E7%9A%84pcm%E4%BF%9D%E5%AD%98%E5%88%B0buff/m-p/2339015#M5094 <P>我目前拿不到dsp的ide，还有dsp sdk，无法进行DSP侧的开发，你们目前样例里边携带的dsp固件，能支持我拿到pcm数据不？</P> Wed, 25 Mar 2026 06:56:00 GMT https://community.nxp.com/t5/MCX-Microcontrollers/evk-mimxrt685-dsp-%E8%BE%93%E5%87%BA%E7%9A%84pcm%E4%BF%9D%E5%AD%98%E5%88%B0buff/m-p/2339015#M5094 wei-z8 2026-03-25T06:56:00Z