https://community.nxp.com/t5/LPC-Microcontrollers/HOW-TO-DEFINE-I2S-DMA-PARA/m-p/2326053#M59429 <P>Hi&nbsp;<a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/259484">@harry3</a>&nbsp;</P> <P>May i ask which chip you are using?</P> <P>BR</P> <P>Harry</P> Wed, 04 Mar 2026 08:07:48 GMT Harry_Zhang 2026-03-04T08:07:48Z https://community.nxp.com/t5/LPC-Microcontrollers/HOW-TO-DEFINE-I2S-DMA-PARA/m-p/2325533#M59426 <P>hi NXP team,</P><DIV><DIV><SPAN>#define</SPAN> <SPAN>DEMO_I2S_TX_INSTANCE_INDEX</SPAN><SPAN> &nbsp; &nbsp; &nbsp;(</SPAN><SPAN>7U</SPAN><SPAN>)</SPAN></DIV><DIV><SPAN>#define</SPAN> <SPAN>DEMO_DMA_INSTANCE_INDEX</SPAN><SPAN> &nbsp; &nbsp; &nbsp; &nbsp; (</SPAN><SPAN>0U</SPAN><SPAN>)</SPAN></DIV><DIV><SPAN>#define</SPAN> <SPAN>DEMO_I2S_TX_CHANNEL</SPAN><SPAN> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (</SPAN><SPAN>19</SPAN><SPAN>)</SPAN></DIV><DIV><SPAN>#define</SPAN> <SPAN>DEMO_I2S_MASTER_CLOCK_FREQUENCY</SPAN><SPAN> (</SPAN><SPAN>24576000</SPAN><SPAN>)</SPAN></DIV><DIV>&nbsp;</DIV><DIV><SPAN>The above definitions use DMA to transmit I2S TX (I2S7). Now I want to use I2S6 for I2S DMA reception. How should I configure these values?</SPAN></DIV><DIV><SPAN>上面这些定义是使用DMA 传输 I2S TX （I2S7）, 我现在要使用I2S6 做i2s dma rx。改如何配置这几个值呢？</SPAN></DIV><DIV><DIV><SPAN>#define</SPAN> <SPAN>DEMO_I2S_RX_INSTANCE_INDEX</SPAN><SPAN> &nbsp; &nbsp; &nbsp;(<STRONG>????</STRONG></SPAN><SPAN>)</SPAN></DIV><DIV><SPAN>#define</SPAN> <SPAN>DEMO_RX_DMA_INSTANCE_INDEX</SPAN><SPAN> &nbsp; &nbsp; &nbsp; &nbsp; (<STRONG>????</STRONG></SPAN><SPAN>)</SPAN></DIV><DIV><SPAN>#define</SPAN> <SPAN>DEMO_I2S_RX_CHANNEL</SPAN><SPAN> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (<STRONG>????</STRONG></SPAN><SPAN>)</SPAN></DIV><DIV>&nbsp;</DIV><DIV><SPAN>Thanks</SPAN></DIV><DIV><SPAN>Harry&nbsp;</SPAN></DIV></DIV></DIV> Tue, 03 Mar 2026 10:17:15 GMT https://community.nxp.com/t5/LPC-Microcontrollers/HOW-TO-DEFINE-I2S-DMA-PARA/m-p/2325533#M59426 harry3 2026-03-03T10:17:15Z https://community.nxp.com/t5/LPC-Microcontrollers/HOW-TO-DEFINE-I2S-DMA-PARA/m-p/2326053#M59429 <P>Hi&nbsp;<a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/259484">@harry3</a>&nbsp;</P> <P>May i ask which chip you are using?</P> <P>BR</P> <P>Harry</P> Wed, 04 Mar 2026 08:07:48 GMT https://community.nxp.com/t5/LPC-Microcontrollers/HOW-TO-DEFINE-I2S-DMA-PARA/m-p/2326053#M59429 Harry_Zhang 2026-03-04T08:07:48Z