https://forge.codesys.com/forge/talk/Runtime/thread/4e2eb80123/2021-08-26T18:47:54.118000ZRecent posts to Generating SPI Communication without a Driver2021-08-26T18:47:54.118000Z2021-08-26T18:47:54.118000Zbwaythttps://forge.codesys.com/u/bwayt/https://forge.codesys.com8525ee1fd59350a24ac50bee51db0358de90647d

<div class="markdown_content"><p>I'd like to ask about that last part. Why do we specify speed in the SPI_master options when we have to specify it anyway when we call .transferExt?</p></div>

2021-08-26T06:43:49.072000Z2021-08-26T06:43:49.072000Zeschwellingerhttps://forge.codesys.com/u/eschwellinger/https://forge.codesys.com4ae901abc7c888fd0510a096654625f9227248c3

<div class="markdown_content"><p>Hi,<br/> check this example here:<br/> c:\Users\&lt;yourwindowsusername&gt;\CODESYS Control for Raspberry PI\4.1.0.0\Examples\PiFace_FB.project<br/> this example should show how you use a SPI device from your project without having a library.<br/> Do not forget to reduce SPI diMaxSpeed, <br/> this leads sometimes to problems.&lt;/yourwindowsusername&gt;</p></div>

2021-08-25T22:30:25.046000Z2021-08-25T22:30:25.046000Zbwaythttps://forge.codesys.com/u/bwayt/https://forge.codesys.com585d3255085e376f4f074a0a33c9fd476f50c961

<div class="markdown_content"><p>(SPI is enabled on the RPi)<br/> I took a look at that link and gave it a try, creating a class that extended SPI.<br/> It seems that CODESYS wants BeforeWriteOutputs, AfterReadInputs, and Initialize to be overloaded with a call to SUPER. Wouldn't that mean I'd also have to write the .xml file? Is there any way to get around this?</p></div>

2021-08-24T21:28:29.535000Z2021-08-24T21:28:29.535000Zh-hermsenhttps://forge.codesys.com/u/hermsen/https://forge.codesys.comcf7687b3a29ca893d48bad53e012716cbf13398a

<div class="markdown_content"><p>myabe this topic provides you some extra help?</p> <p><a href="https://forge.codesys.com/forge/talk/Runtime/thread/81d88db728/#8322">https://forge.codesys.com/forge/talk/Runtime/thread/81d88db728/#8322</a></p></div>

2021-08-24T20:08:07.774000Z2021-08-24T20:08:07.774000Zbwaythttps://forge.codesys.com/u/bwayt/https://forge.codesys.comb897baad62efc24c94a8e90219d76047715b2807

<div class="markdown_content"><p>Hello all,<br/> I am trying to initiate SPI communication with a LS3667R buffer board (https://lsicsi.com/datasheets/LS7366R.pdf). Following suggestions for my previous post (https://forge.codesys.com/forge/talk/Runtime/thread/80ca780e26/?limit=25#7ed3/bb06), I decided to execute SPI communication directly in my PLC_PRG with a call to a "read" and "write" method; these methods in turn (ideally) start SPI communication using</p> <div class="codehilite"><pre><span></span><span class="err">SPI_master.transferExt(pabyTxBuffer, pabyRxBuffer, udiLen, uiDelayus, udiSpeedHz)</span> </pre></div> <p>Putting a scope on the RPi4's MOSI and SCLK lines shows nothing. Am I way off in my approach?</p></div>