https://forge.codesys.com/forge/talk/Runtime/thread/cd56260d1f/2020-02-27T16:33:38.271000ZRecent posts to I2C baud rate2020-02-27T16:33:38.271000Z2020-02-27T16:33:38.271000ZAnonymoushttps://forge.codesys.com/u/*anonymous/https://forge.codesys.comab2869c5c48fa79b372f7420cce72c52f215a91d

<div class="markdown_content"><p><em>Originally created by:</em> carlos.rivera</p> <blockquote> <p><strong>Edwin Schwellinger hat geschrieben:</strong><br/> Hi,<br/> we have removed it,<br/> it is more feasible to set it in /boot/config.txt as RASBIAN offer to do.<br/> BR<br/> Edwin</p> </blockquote> <p>Thanks so much Edwin. It worked.</p></div>

2020-02-27T16:33:37.268000Z2020-02-27T16:33:37.268000ZStefan2https://forge.codesys.com/u/stefan2/https://forge.codesys.com4079285abc83359e409272c3711f1e65a874b498

<div class="markdown_content"><p>Hi Edwin,</p> <p>thanks for Reply.</p> <p>I'll check /boot/config.txt for that.</p> <p>BR Stefan</p></div>

2020-02-27T16:33:34.764000Z2020-02-27T16:33:34.764000Zeschwellingerhttps://forge.codesys.com/u/eschwellinger/https://forge.codesys.combd18a1c6d0cf2c50b54d8778803a4969bb39ec61

<div class="markdown_content"><p>Hi,<br/> we have removed it,<br/> it is more feasible to set it in /boot/config.txt as RASBIAN offer to do.</p> <p>BR<br/> Edwin</p></div>

2020-02-27T16:33:33.858000Z2020-02-27T16:33:33.858000ZAnonymoushttps://forge.codesys.com/u/*anonymous/https://forge.codesys.com1cd6b16645ada9ea49457f35dca0ca84fef020c4

<div class="markdown_content"><p><em>Originally created by:</em> carlos.rivera</p> <blockquote> <p><strong>Stefan2 hat geschrieben:</strong><br/> Hi,<br/> did the location of </p> </blockquote> <div class="codehilite"><pre><span></span><span class="n">echo</span> <span class="mi">400000</span> <span class="o">&gt;</span> <span class="o">/</span><span class="n">sys</span><span class="o">/</span><span class="n">module</span><span class="o">/</span><span class="n">i2c_bcm2708</span><span class="o">/</span><span class="k">parameters</span><span class="o">/</span><span class="n">baudrate</span> </pre></div> <p>moved?<br/> can't find it anymore in <br/> /etc/init.d/codesyscontrol <br/> BR Stefan</p> <p>Stefan were you be able to change the baudrate at the end? does anyone knows where to change it for the new raspberry. I can find /etc/init.d/codesyscontrol but cannot see this line echo 400000 &gt; /sys/module/i2c_bcm2708/parameters/baudrate. Thank you.</p></div>

2020-02-27T16:33:32.976000Z2020-02-27T16:33:32.976000ZStefan2https://forge.codesys.com/u/stefan2/https://forge.codesys.comfbed861bd5ca50939b7f39a84a79dfb3dc0723e5

<div class="markdown_content"><p>Hi,</p> <p>did the location of </p> <div class="codehilite"><pre><span></span><span class="n">echo</span> <span class="mi">400000</span> <span class="o">&gt;</span> <span class="o">/</span><span class="n">sys</span><span class="o">/</span><span class="n">module</span><span class="o">/</span><span class="n">i2c_bcm2708</span><span class="o">/</span><span class="k">parameters</span><span class="o">/</span><span class="n">baudrate</span> </pre></div> <p>moved?</p> <p>can't find it anymore in </p> <p>/etc/init.d/codesyscontrol </p> <p>BR Stefan</p></div>

2020-02-27T16:33:30.527000Z2020-02-27T16:33:30.527000Zswitcherhttps://forge.codesys.com/u/switcher/https://forge.codesys.com66862613eb0d1b5b43043041f666d900e04739ce

<div class="markdown_content"><p>Hi,</p> <p>it looks ok.</p> <p>You don't have to copy anything. <br/> Just change parameter in /etc/init.d/codesyscontrol:<br/> echo 400000 &gt; /sys/module/i2c_bcm2708/parameters/baudrate<br/> to:<br/> echo 100000 &gt; /sys/module/i2c_bcm2708/parameters/baudrate</p> <p>and save file, then do reboot.<br/> It should work.</p> <p>Best regards,<br/> Zdenko.</p></div>

2020-02-27T16:33:29.656000Z2020-02-27T16:33:29.656000Zkimaohttps://forge.codesys.com/u/kimao/https://forge.codesys.com6fc966b382a01fed42bf61dcdb25196513f118f3

<div class="markdown_content"><p>Hello<br/> I'm trying to change the i2c baud rate to 100kHz following the example above. I have copied the code in to the "codesyscontrol" file but when restarting the pi, codesys does not work.<br/> Is this how the change was intended? see attached picture.</p> <p>Thank</p> <p><img alt="IMG: codesyscontrol.png" rel="nofollow" src="https://forum.codesys.com//download/file.php?id=810"/></p></div>

2020-02-27T16:33:27.203000Z2020-02-27T16:33:27.203000Zswitcherhttps://forge.codesys.com/u/switcher/https://forge.codesys.com7cb42cd43bd04642c07a862fe25603fb79a071c2

<div class="markdown_content"><p>Thank you Edwin! It works .</p> <p>BR,<br/> Zdenko.</p></div>

2020-02-27T16:33:26.292000Z2020-02-27T16:33:26.292000Zeschwellingerhttps://forge.codesys.com/u/eschwellinger/https://forge.codesys.com5314287a1efa82dcdea4e1dc44719fc6bc893803

<div class="markdown_content"><p>Hi Zdenko,</p> <p>you need to change this in:</p> <p>/etc/init.d/codesyscontrol </p> <p>snippet:</p> <div class="codehilite"><pre><span></span><span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="n">make_mknod</span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="n">killall</span> <span class="n">codesyscontrol</span><span class="p">.</span><span class="n">bin</span> <span class="o">&gt;</span> <span class="o">/</span><span class="n">dev</span><span class="o">/</span><span class="k">null</span><span class="p">;</span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="n">export</span> <span class="n">PlcConfigFile</span><span class="o">=/</span><span class="n">etc</span><span class="o">/</span><span class="n">CODESYSControl</span><span class="p">.</span><span class="n">cfg</span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="n">echo</span> <span class="n">bcm2708_i2c</span><span class="p">.</span><span class="mi">0</span> <span class="o">&gt;</span> <span class="o">/</span><span class="n">sys</span><span class="o">/</span><span class="n">bus</span><span class="o">/</span><span class="n">platform</span><span class="o">/</span><span class="n">drivers</span><span class="o">/</span><span class="n">bcm2708_i2c</span><span class="o">/</span><span class="n">unbind</span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="n">echo</span> <span class="mi">400000</span> <span class="o">&gt;</span> <span class="o">/</span><span class="n">sys</span><span class="o">/</span><span class="n">module</span><span class="o">/</span><span class="n">i2c_bcm2708</span><span class="o">/</span><span class="k">parameters</span><span class="o">/</span><span class="n">baudrate</span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="err"> </span> <span class="n">echo</span> <span class="n">bcm2708_i2c</span><span class="p">.</span><span class="mi">0</span> <span class="o">&gt;</span> <span class="o">/</span><span class="n">sys</span><span class="o">/</span><span class="n">bus</span><span class="o">/</span><span class="n">platform</span><span class="o">/</span><span class="n">drivers</span><span class="o">/</span><span class="n">bcm2708_i2c</span><span class="o">/</span><span class="n">bind</span> </pre></div> <p>BR <br/> Edwin</p></div>

2020-02-27T16:33:25.427000Z2020-02-27T16:33:25.427000Zswitcherhttps://forge.codesys.com/u/switcher/https://forge.codesys.com018935a0cfa2d146c71a2479cf03ee1a3459f19b

<div class="markdown_content"><p>Hi,</p> <p>How can I change I2C baud rate permanently?</p> <p>Default is 400kHz.</p> <p>I tried:<br/> sudo modprobe i2c_bcm2708 baudrate=100000<br/> sudo bash -c "echo options i2c_bcm2708 baudrate=100000 &gt; /etc/modprobe.d/i2c.conf"</p> <p>But this doesn't work. After reboot, baud rate is set to 400kHz again.</p> <p>Thank you.</p> <p>BR<br/> Zdenko.</p></div>