https://community.nxp.com/t5/i-MX-Processors/eDMA-ping-pong-buffer-sorting/m-p/1991978#M230723 <P>Good day to all!<BR />I use IMX8ULPIEC processor and i&nbsp;<SPAN>programming SAI interface under m-33 core.<BR />I receive data in the format ABC_ABC_ABC_ABC... via eDma using the <STRONG><EM>SAI_TransferReceiveLoopEDMA()</EM></STRONG> function and thus receive a ping-pong buffer for two arrays storing ABCABCABC alternately.<BR />However, I would like the data after reception to look like this: AAAA......BBBB......CCCC...(end) and also issued alternately in two buffers as in the ping-pong buffer.<BR />Is it possible to do this within one eDMA stream without stopping reception? Are there any examples of similar packaging?<BR /></SPAN></P><P><SPAN>Thanks in advance.<BR /></SPAN></P> Mon, 11 Nov 2024 12:54:40 GMT Sandroom 2024-11-11T12:54:40Z https://community.nxp.com/t5/i-MX-Processors/eDMA-ping-pong-buffer-sorting/m-p/1991978#M230723 <P>Good day to all!<BR />I use IMX8ULPIEC processor and i&nbsp;<SPAN>programming SAI interface under m-33 core.<BR />I receive data in the format ABC_ABC_ABC_ABC... via eDma using the <STRONG><EM>SAI_TransferReceiveLoopEDMA()</EM></STRONG> function and thus receive a ping-pong buffer for two arrays storing ABCABCABC alternately.<BR />However, I would like the data after reception to look like this: AAAA......BBBB......CCCC...(end) and also issued alternately in two buffers as in the ping-pong buffer.<BR />Is it possible to do this within one eDMA stream without stopping reception? Are there any examples of similar packaging?<BR /></SPAN></P><P><SPAN>Thanks in advance.<BR /></SPAN></P> Mon, 11 Nov 2024 12:54:40 GMT https://community.nxp.com/t5/i-MX-Processors/eDMA-ping-pong-buffer-sorting/m-p/1991978#M230723 Sandroom 2024-11-11T12:54:40Z https://community.nxp.com/t5/i-MX-Processors/eDMA-ping-pong-buffer-sorting/m-p/1994639#M230864 <P>I figured out the problem.<BR />I had to change the function <STRONG>SAI_TransferReceiveLoopEDMA()</STRONG> a little, called it <STRONG>SAI_TransferReceiveLoopEDMASetuped()</STRONG>.<BR />If someone encounters a similar problem, I am attaching a file with the source code of the modified function and its application.</P> Thu, 14 Nov 2024 12:42:58 GMT https://community.nxp.com/t5/i-MX-Processors/eDMA-ping-pong-buffer-sorting/m-p/1994639#M230864 Sandroom 2024-11-14T12:42:58Z