topic IMX6UL redundant interrupts in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/IMX6UL-redundant-interrupts/m-p/896456#M135455 <HTML><HEAD></HEAD><BODY><P>I develop driver for Linux which&nbsp;need to count level changes on the line.</P><P>I register&nbsp;my ISR at falling trigger, but I see hadler called on rising level.</P><P></P><P>I attached some debug info as screenshots and minimal code I can reproduce the problem with.<BR /><BR />Why is ISR called redundantly? Would appreciate any thoughts on this.<BR />Thanks.</P></BODY></HTML> Tue, 30 Apr 2019 09:03:40 GMT ilya_kondrashki 2019-04-30T09:03:40Z IMX6UL redundant interrupts https://community.nxp.com/t5/i-MX-Processors/IMX6UL-redundant-interrupts/m-p/896456#M135455 <HTML><HEAD></HEAD><BODY><P>I develop driver for Linux which&nbsp;need to count level changes on the line.</P><P>I register&nbsp;my ISR at falling trigger, but I see hadler called on rising level.</P><P></P><P>I attached some debug info as screenshots and minimal code I can reproduce the problem with.<BR /><BR />Why is ISR called redundantly? Would appreciate any thoughts on this.<BR />Thanks.</P></BODY></HTML> Tue, 30 Apr 2019 09:03:40 GMT https://community.nxp.com/t5/i-MX-Processors/IMX6UL-redundant-interrupts/m-p/896456#M135455 ilya_kondrashki 2019-04-30T09:03:40Z Re: IMX6UL redundant interrupts https://community.nxp.com/t5/i-MX-Processors/IMX6UL-redundant-interrupts/m-p/896457#M135456 <HTML><HEAD></HEAD><BODY><P>Hi Ilya</P><P></P><P>what bsp used in the case, one can try with nxp linux from</P><P><A class="link-titled" href="https://source.codeaurora.org/external/imx/linux-imx/tree/?h=imx_4.14.98_2.0.0_ga" title="https://source.codeaurora.org/external/imx/linux-imx/tree/?h=imx_4.14.98_2.0.0_ga">linux-imx - i.MX Linux kernel</A>&nbsp;</P><P>and try to debug it using sect.2.1.2 Interrupts (Operation) attached Linux Manual</P><P>AN4553 Using Open Source Debugging Tools for Linux on i.MX Processors<BR /><A href="https://www.nxp.com/docs/en/application-note/AN4553.pdf" target="test_blank">https://www.nxp.com/docs/en/application-note/AN4553.pdf</A></P><P></P><P>Best regards<BR />igor<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Tue, 30 Apr 2019 23:06:46 GMT https://community.nxp.com/t5/i-MX-Processors/IMX6UL-redundant-interrupts/m-p/896457#M135456 igorpadykov 2019-04-30T23:06:46Z