Recent posts to GPIO output not workinghttps://forge.codesys.com/forge/talk/Runtime/thread/7346b1a299/2020-02-27T17:44:42.360000ZRecent posts to GPIO output not workingGPIO output not working2020-02-27T17:44:42.360000Z2020-02-27T17:44:42.360000ZAnonymoushttps://forge.codesys.com/u/*anonymous/https://forge.codesys.com7cc78aafc48183e3bd82a47ab8420c8c17ed8e1a<div class="markdown_content"><p><em>Originally created by:</em> RobA</p>
<p>Hello</p>
<p>I tried to test the "CODESYS Control for BeagleBone SL" on a BBB. Therefor i wrote a little program to read GPIO45 (P8_11) & writes GPIO44 (P8_12) constant true . To the input I applied 3.3V with a switch and the output I measured directly with an oscilloscope (reference to GND).</p>
<p><strong>Problem:</strong><br/>
Reading the GPIO works perfekt, writing GPIO <strong>not</strong>. The Codesys Software changes the GPIO correctly to true but I can't measure the output on my BBB. </p>
<p>The same program works with a raspberry pi 3 and the same GPIO works aswell as input if i change the GPIO mapping/parameter. I can aswell toggle the GPIO directly from Linux with a python script with the same setup.<br/>
Seems like something is blocking the output. <strong>Does someone have an idea what the problem is?</strong></p>
<p><strong>Hardware: </strong><br/>
Beaglebone Black Rev. C<br/>
--> installed Linux Debian 9.9 2019-08-03 4GB SD LXQT</p>
<p><strong>Software: </strong><br/>
CODESYS Control for BeagleBone SL Version 3.5.13.0 (tested first 3.5.15.30 but same problem happened, therefor i switched back to 3.5.13.0<br/>
CODESYS V3.5 SP13</p>
<p>(you can answer aswell in german)</p>
<p><img alt="IMG: GPIO_IO_Map.png" rel="nofollow" src="https://forum.codesys.com//download/file.php?id=5193"/></p>
<p><img alt="IMG: GPIO_Param.png" rel="nofollow" src="https://forum.codesys.com//download/file.php?id=5194"/></p>
<p><img alt="IMG: Code.png" rel="nofollow" src="https://forum.codesys.com//download/file.php?id=5195"/></p>
<p><img alt="IMG: GPIO_IO_Map_run_false.png" rel="nofollow" src="https://forum.codesys.com//download/file.php?id=5197"/></p>
<p><img alt="IMG: GPIO_IO_Map_run_true.png" rel="nofollow" src="https://forum.codesys.com//download/file.php?id=5198"/></p>
<p><a class="" href="https://forum.codesys.com//download/file.php?id=5196" rel="nofollow">beagle_OutNotWorking_1.project <span><span>[186.92 KiB]</span></span></a></p></div>