topic How to get gpio value when I change it. in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/How-to-get-gpio-value-when-I-change-it/m-p/511139#M83324 <HTML><HEAD></HEAD><BODY><P>In imx6ul , I use gpio 19 for test , if I make the dir to out , and then I echo 1 or 0 to value , I can get the correct status by multimeter ， but how can I get the gpio value in the use space ? And may I read the register value ? Thanks a lot.</P></BODY></HTML> Mon, 18 Apr 2016 13:11:30 GMT sijian_cai 2016-04-18T13:11:30Z How to get gpio value when I change it. https://community.nxp.com/t5/i-MX-Processors/How-to-get-gpio-value-when-I-change-it/m-p/511139#M83324 <HTML><HEAD></HEAD><BODY><P>In imx6ul , I use gpio 19 for test , if I make the dir to out , and then I echo 1 or 0 to value , I can get the correct status by multimeter ， but how can I get the gpio value in the use space ? And may I read the register value ? Thanks a lot.</P></BODY></HTML> Mon, 18 Apr 2016 13:11:30 GMT https://community.nxp.com/t5/i-MX-Processors/How-to-get-gpio-value-when-I-change-it/m-p/511139#M83324 sijian_cai 2016-04-18T13:11:30Z Re: How to get gpio value when I change it. https://community.nxp.com/t5/i-MX-Processors/How-to-get-gpio-value-when-I-change-it/m-p/511140#M83325 <HTML><HEAD></HEAD><BODY><P>Simple GPIO Example - quandry </P><P><A _jive_internal="true" href="https://community.nxp.com/message/598834#598834">https://community.freescale.com/message/598834#598834</A></P></BODY></HTML> Tue, 19 Apr 2016 08:08:14 GMT https://community.nxp.com/t5/i-MX-Processors/How-to-get-gpio-value-when-I-change-it/m-p/511140#M83325 BiyongSUN 2016-04-19T08:08:14Z Re: How to get gpio value when I change it. https://community.nxp.com/t5/i-MX-Processors/How-to-get-gpio-value-when-I-change-it/m-p/511141#M83326 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P>An option could be using boolean variables for the pin values, and using those variables to assign the pin values and to know the pin status.</P><P>Additionally, you could find some complementary information at the link below:</P><P><A href="http://falsinsoft.blogspot.com/2012/11/access-gpio-from-linux-user-space.html" title="http://falsinsoft.blogspot.com/2012/11/access-gpio-from-linux-user-space.html">Access GPIO from Linux user space</A> </P><P></P><P>Hope this will be useful for you.<BR />Best regards!<BR />/Carlos<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Wed, 20 Apr 2016 14:58:14 GMT https://community.nxp.com/t5/i-MX-Processors/How-to-get-gpio-value-when-I-change-it/m-p/511141#M83326 CarlosCasillas 2016-04-20T14:58:14Z