PCAN-driver for Linux - PEAK-System

*** Warning: Overriding SUBDIRS on the command line can cause
*** inconsistencies
Is something not right?
A. I am afraid that the discussion within the kernel-developer community about the right
way of translating external modules hasn't found an end until this release. The current
way generates this warning and at worst translates all of the modules again. Though
there are approaches that the generation of external modules like pcan.ko is getting
easier. This message can be ignored.
Q. I got a lot of error messages when compiling the driver for a kernel 2.6.x system.
What's wrong?
A. To compile for kernel 2.6 target system you need to have a pre-configured kernel.
To accomplish this you need to install the target kernel sources. Then do
cd /usr/src/linux # for example
su # you need to be root
make cloneconfig # create a configuration suitable for your running kernel
make scripts # create the necessary scripts
That's all. Now you can – as ordinary user – compile your driver.
Q. While translating the driver following message appears:
*** "Can't find /usr/src/linux-2.4.24.SuSE/include/linux/version.h !". End.
What's the problem?
A. Within the driver makefile up from version 3.3 the target kernel version is not being
won out of the interpretation of the command 'uname -r', but extracted out of contents
of the file „$(KERNEL_LOCATION)/include/linux/include/version.h“. (If there wasn't
any special „KERNEL_LOCATION“ given at the command line of „make“
„KERNEL_LOCATION=/usr/src/linux“ is being used as default.) While translating the
kernel sources the file „version.h“ is generated. Normally this message has its cause
in not translated kernel sources. Until kernels 2.4.x it was enough if the distribution had
installed this file. From kernel 2.6.x on it is necessary that the kernel sources for the
target system are configured and translated completely. Then the file „version.h“ is
being created.
Q. I like to have interrupt sharing with PCAN-ISA or PCAN-PC/104
A. No problem since version 3.30 of the driver. But you should be aware that interrupt
sharing with ISA BUS is only possible with devices which are supported from the same
driver, e.g. the pcan driver. For example it is not possible to share a serial device with a
pcan device but two pcan devices can share the same interrupt level.
Q. I got other questions or problems with the driver.
A. Please consult linux@peak-system.com.
Q. I am enthusiastic about the driver or the documentation and want to contribute
something to make it better. Who do I have to consult?
A. Please also contribute linux@peak-system.com. Peak and the author are happy
about every positive response.
Appendix
(1*) = The „Parport Subsystem“ has to be configured to use a interrupt. Therefore
following lines have to be entered into the file „/etc/modules.conf“ or
PCAN-driver for Linux page 20 of 23