https://community.nxp.com/t5/i-MX-Processors/EIM-asynchronous-communication-found-many-strange-problems/m-p/1449908#M189765 <P>My development board is imx6q, which is connected to FPGA through EIM bus.</P><P>I found that the acquisition rate of EIM bus is very unstable. I created two threads in the program. One thread is used to collect FPGA data, and the other thread prints the collected information. I found a strange phenomenon: when I open printf, EIM_ LBA is like this.&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="微信图片_20220427200946.jpg" style="width: 999px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/178181i92990B9AE287D973/image-size/large?v=v2&amp;px=999" role="button" title="微信图片_20220427200946.jpg" alt="微信图片_20220427200946.jpg" /></span></P><P>When I turn off printf, EIM_ LBA is like this.</P><P><FONT><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="微信图片_20220427201037.jpg" style="width: 999px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/178183i25F5BB25CA24DF72/image-size/large?v=v2&amp;px=999" role="button" title="微信图片_20220427201037.jpg" alt="微信图片_20220427201037.jpg" /></span></FONT></P><P>&nbsp;</P><P><FONT>Why does it change from data in groups of 16 to data in groups of 4</FONT></P> Wed, 27 Apr 2022 12:14:16 GMT A_cat_with_young 2022-04-27T12:14:16Z https://community.nxp.com/t5/i-MX-Processors/EIM-asynchronous-communication-found-many-strange-problems/m-p/1449908#M189765 <P>My development board is imx6q, which is connected to FPGA through EIM bus.</P><P>I found that the acquisition rate of EIM bus is very unstable. I created two threads in the program. One thread is used to collect FPGA data, and the other thread prints the collected information. I found a strange phenomenon: when I open printf, EIM_ LBA is like this.&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="微信图片_20220427200946.jpg" style="width: 999px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/178181i92990B9AE287D973/image-size/large?v=v2&amp;px=999" role="button" title="微信图片_20220427200946.jpg" alt="微信图片_20220427200946.jpg" /></span></P><P>When I turn off printf, EIM_ LBA is like this.</P><P><FONT><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="微信图片_20220427201037.jpg" style="width: 999px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/178183i25F5BB25CA24DF72/image-size/large?v=v2&amp;px=999" role="button" title="微信图片_20220427201037.jpg" alt="微信图片_20220427201037.jpg" /></span></FONT></P><P>&nbsp;</P><P><FONT>Why does it change from data in groups of 16 to data in groups of 4</FONT></P> Wed, 27 Apr 2022 12:14:16 GMT https://community.nxp.com/t5/i-MX-Processors/EIM-asynchronous-communication-found-many-strange-problems/m-p/1449908#M189765 A_cat_with_young 2022-04-27T12:14:16Z https://community.nxp.com/t5/i-MX-Processors/EIM-asynchronous-communication-found-many-strange-problems/m-p/1449909#M189766 <P>I need your help</P> Wed, 27 Apr 2022 12:15:08 GMT https://community.nxp.com/t5/i-MX-Processors/EIM-asynchronous-communication-found-many-strange-problems/m-p/1449909#M189766 A_cat_with_young 2022-04-27T12:15:08Z