On Mon, Jan 3, 2011 at 5:09 PM, Kfir Lavi <lavi.k...@gmail.com> wrote:
> > > On Mon, Jan 3, 2011 at 3:00 PM, Philip Downer <p...@pjd.me.uk> wrote: > >> On 03/01/11 12:47, Kfir Lavi wrote: >> >> I have a FPGA that is constantly changing (its on development phase). >>> I want to let userspace app to update those registers, but don't want to >>> create an API yet. >>> What is the best way to open a range of registers to userspace, so no >>> driver update is required? >>> >> >> When I had to do this recently I used sysfs, I have no idea if it's the >> best way but it certainly was very effective. Remember in sysfs that each >> file should only have one value. >> >> Once it's setup though you can just write to the sysfs files, I started by >> writing simple perl scripts to test things before starting to write more >> complex apps. >> >> HTH >> >> Phil >> > So what do expose in sysfs? for each register - a file of it's own? or you > get a bulk of data to one file? > > Thanks, > Kfir > I thought about using 3 files in sysfs. 1. address of the register 2. data to write to the register 3. trigger that do the write Please share your comments. Regards, Kfir
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