thanks for the contribution. I've put some of it on the docs.html page and some in doc/i2c-pport in i2c. mds David wrote: > Hi, > > I have raised a ticket about not being able to find how to get the i2c-pcf-epp > module. Ticket number 1131. This can be closed as I now know where it is and > why it is this way. > > Maybe you could consider adding a bit of text on the page > http://www2.lm-sensors.nu/~lm78/docs.html > under the single paragraph of explanation for the diagram. > > I offer the following for comments, suggestions and corrections. It is > something that I feel would have helped me a great deal as I sought to > understand the lm_sensors project and would have also avoided me raising 2 > support requests. > > So here goes:: > > The program rectangle is made up of the lm_sensors userspace programs and > configuration and documentation files. > Examples of which are: > sensors > sensors-detect > i2cdetect > isadump > sensors.conf > and associated man pages > > As you can see from the diagram this is only a small part of a working > lm_sensors installation. The rest of the work is done inside the kernel by > two branches of lm_sensors that work together, one is called sensors (or > should that be sensors2) while the other is i2c. You will need both in order > to fully utilise lm_sensors. Depending on what kernel you are using (or more > specifically what kernel your distribution has provided to you) will > determine what lm_sensors is capable of doing. If you find that you cannot > address all of the sensor chips you have or maybe you can't even get > i2cdetect to see your adaptor chip then you should check to see if lm_sensors > supports your hardware on > > If your hardware is supported but your current kernel/distribution isn't > working then you will probably have to patch and compile the kernel. > > You could just download the latest kernel version from www.kernel.org or get > the sources from your distribution. If you do this and compile it, being > carefull to configure all the devices you need, you should be aware that even > the latest kernel from kernel.org does not have all of the supported sensors > and chips in it. To enable a kernel from kernel.org to support all of the > sensors, algorithms and adaptors that it is capable of you will need to patch > the kernel. Patches are available from http://home.attbi.com/~ac9410/ for the > later 2.4 series kernels. > > You can apply patches by: > cd path_to_your_kernel_sources > path -p1 -E < path_to_the_patches/2.4.20-sensors-1-patch > > Do the same for all the sensors and i2c patches you downloaded. > Note: As patches are prepared against kernels from kernel.org if you are > patching against your distribution specific source code there is a > possibility that the patches won't cleanly apply. If this is the case you can > either try and resolve it manually (if you are capable of doing this), get a > kernel from kernel.org or give up and go and do something else. > > Detailed information about compiling & patching the kernel is available at > http://en.tldp.org/HOWTO/Kernel-HOWTO.html > > A note about algorithm and adaptor code: > Most code for algorithm and adaptors are combined into the one module as you > need both in order to be able to function correctly. There are a couple of > exceptions to this in the form of parallel port adaptors. > > Parallel port adaptors > Most people don't need to worry about this. > If you are installing parallel port adaptors it means you are probably messing > around with wires and IC's and the like. If you have purchased a card that > provides external an external i2c/smbus this will have combined algorithm and > adaptor code. If you are doing it yourself by using the parallel port there > are basically 2 options. > > 1) Using the parallel port and using the i2c-pport adaptor module and the > i2c-algo-bit algorithm module together to enable you to wire up your parallel > port to act as an i2c/smbus. This provides a bus that will enable most > sensors to work but doesn't support the entire i2c/smbus capability > > 2) Using the parallel port to interface to a Philips PCF8584 parallel to i2c > adaptor chip. You will need to build a bit of a circuit to do this. This > configuration needs the i2c-pcf-epp adaptor module and the i2c-algo-pcf > algorithm module. This support almost all of the i2c/smbus capabilities > > > > > Okay that's it. Did I get it mostly right? > > Turned out a bit longer than I expected. Feel free to use, change or omit as > you feel appropriate. > > Many thanks for all your efforts and the project. It is really great (be even > better when I get it working ;) >
