Sophie CARAYOL wrote: >Another question, if i use mmap to map physical addresses of I/O registers, >could i dereference the pointer on virtual adresse to access data or should >i use read/write on the file descriptor ?
Yes, you can dereference the pointer. Don't you remember my past mail? >From the Denx's FAQ (TFQ hits the list monthly) for accessing memory bus: http://www.denx.de/twiki/bin/view/PPCEmbedded/DeviceDrivers#Section_AccessingPeripheralsFromUserSpace or shorter: http://tinyurl.com/6c7th See linux/drivers/char/mem.c to check if mmap support is ok on your arch. Kenavo -- St?phane
