From mboxrd@z Thu Jan 1 00:00:00 1970 From: phil@pjd.me.uk (Philip Downer) Date: Mon, 03 Jan 2011 13:00:30 +0000 Subject: FPGA registers userspace interface? In-Reply-To: References: Message-ID: <4D21C86E.6060503@pjd.me.uk> To: kernelnewbies@lists.kernelnewbies.org List-Id: kernelnewbies.lists.kernelnewbies.org 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