On 08/15/2014 08:47 AM, Reitinger, Peter wrote:
> Hello,
>
> meanwhile I have solved the issue on my own. I tried to access the
> SPI1 HW with traditional mmap approach from user space and had the
> same problem until I saw that I had to start the whole SPI1 module by
> setting a specific control bit to enable its clock. Sorry for posting
> this, but I was really puzzled then. I guess it will also be possible
> to access the hw registers of the SPI with the xenomai rtdm io user
> mapping now...
It is normally recommended to implement drivers in kernel-space using
the RTDM API: this forces you to define a standard interface
(open/read/write/ioctl) between application and driver, which makes it
easy to re-use the same driver in a different application, or to
implement a driver for a differrent hardware without changing your
application.
--
Gilles.
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