Hi, Thanks for the answer. I mean access to memory maped register from user space through kernel space with help of ioctl call. Now i am using readx/writex functions. These functions allow read/write 8, 16, 32 bit data to the device from any offset. May be are there another functions to read/write arbitrary amount of byte? Best Regards, Kirill ramprasad wrote: >Is it from USER Mode? U can not read physical address directly from user >mode. There is a system call "mmap", which converts the physical address to >virtual address. Through virtual address u can read/write from/to register. > >Check it out the attached example. > >Regards >Ram >----- Original Message ----- >From: "Kirill Messel" <kirill.messel@mtu-net.ru> >To: "Kernel" <kernelnewbies@nl.linux.org> >Sent: Monday, August 19, 2002 6:36 AM >Subject: I am looking for function to write to register > > >>Hi All, >> >>I am looking for function with possibility to read/write from/to >>register the data, which size might be more as >>4 byte. >>Is it possible? Or have i to use readx/writex functions? >> >>Thanks. >>Kirill >> >> >>-- >>Kernelnewbies: Help each other learn about the Linux kernel. >>Archive: http://mail.nl.linux.org/kernelnewbies/ >>FAQ: http://kernelnewbies.org/faq/ >> -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
