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<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-US" style="font-size:
10.0pt">Hi,<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-US" style="font-size:
10.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-US" style="font-size:
10.0pt">I'm using Beckhoff CX20x0 computers for our control system with CX2100-0004 power supply units. The PSU also has an LCD display and navigation buttons.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-US" style="font-size:
10.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-US" style="font-size:
10.0pt">I've written a user space utility that gives you access to the LCD, nav buttons and other PSU information (attached). I based the utility on the "i2c Tools for Linux"
which provides user space access to the i2c devices. The same concepts can be used to create a kernel space module as the i2c-dev.h header uses the same function prototypes as the kernel space calls.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-US" style="font-size:
10.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-US" style="font-size:
10.0pt">This information is available via the SMBus which for these PCs is an Intel QM67 which has a Series 6/C200 SMBus Controller. I'm using Linux 2.6.32.11 which doesn't
support this chipset, so I've also attached a patch to enable it for this kernel.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-US" style="font-size:
10.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-US" style="font-size:
10.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-US" style="font-size:
10.0pt">Regards,<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-US" style="font-size:
10.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-US" style="font-size:
10.0pt">Graeme Foot,<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-US" style="font-size:
10.0pt">Kinetic Engineering Design Ltd.<o:p></o:p></span></font></p>
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