Hi, 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.
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. 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. Regards, Graeme Foot, Kinetic Engineering Design Ltd.
cx2100psu.tar.bz2
Description: cx2100psu.tar.bz2
linux-2.6.32.11-a_i2c.patch
Description: linux-2.6.32.11-a_i2c.patch
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