Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

PIO testing

Hi guys, I'm new to the uClinux, just got it to work and ran the traditional "Hello World" app :rolleyes: now I'm trying something new so before I get tangled, quick q to access a PI...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

read http://www.nioswiki.com/operatingsystems/uclinux (http://www.nioswiki.com/operatingsystems/uclinux) and some of the links provided there.

If you are doing your own harwdare, you indeed will need to create a hardware port for LEDs and buttons. The SOPC-Builder provides modules and instructions.

The "proper" way to access custom hardware in Linux indeed is writing device drivers. AFAIK the already is a "PIO" (or GIO) driver that allows for accessing the Altera Avalon PIO. For non-.standard hardware, again, see the Wiki. In simple cases, you can avoid doing drivers by "uio" (I did not try yet).

-Michael