On 08/29/2011 09:43 AM, yi zheng wrote: > Hi,all > I want to write a Xenomai application running in user space that can > access the > GPIO pins of my AT91SAM9263 ARM. To get the memory > region I found the function rt_misc_get_io_region(). Unfortunately > there is no discription of this function in the API documentation. > Does this function work like request_mem_region()?
Yes, it allows user-space access to request_mem_region. So, in addition to this, you should do the usual mmap(/dev/mem) dance. However, it is probably better to write an RTDM driver using linux gpiolib. This way, you get mutual exclusion between linux and xenomai. -- Gilles. _______________________________________________ Xenomai-help mailing list Xenomai-help@gna.org https://mail.gna.org/listinfo/xenomai-help