Hello,

I am writing an application that wants to access periphals registers outside the standard (allowed) memory area.

Doing so gets me "segmentation fault".
I know, this is natural behaviour.

One way of getting around this is writing the module which has to be loaded by linux. I will consider this some time later.

For now, I want to come to some quick result and allow linux or gcc compiler to write to those memory areas of periphals. Is there a direct way to do so?

Thanks indeed for your contribution.

best regards
einstern

Try ioperm() if you want to access io ports...

for memory access, try /dev/mem with mmap()..

[QUOTE=lonelygoat;3766297]Try ioperm() if you want to access io ports QUOTE]
Thanks for the swift reply!
Is this x86 specific?
I am using arm9 cpu.

Still getting "segmentaion fault".

Kind regards

Oh yeah, it ipperm() and iopl() are both X86 specific..

I am not familiar with arm, try /dev/mem ? map your memory segment of /dev/mem into user space with mmap(), then access it via returned pointer, you will need root privilege...