Hard realtime with Xenomai for NIOS II

Dear all,

Since few months, it is possible to use Xenomai for NIOS II (without MMU) under µClinux.

Xenomai is a hard realtime extension for Linux/µClinux.

The Xenomai port for NIOS II is available from the Xenomai site: http://xenomai.org

You may find specific infos for NIOS II here: http://uuu.enseirb-matmeca.fr/~kadionik/nios2-xenomai/ (http://uuu.enseirb-matmeca.fr/%7ekadionik/nios2-xenomai/)

We have written a tutorial for using Xenomai for NIOS II under µClinux: http://uuu.enseirb-matmeca.fr/~kadionik/nios2-xenomai/doc/xenomai%20on%20nios%20ii%20softcore%20processor%20guide-v1.2.pdf (http://uuu.enseirb-matmeca.fr/%7ekadionik/nios2-xenomai/doc/xenomai%20on%20nios%20ii%20softcore%20processor%20guide-v1.2.pdf)

Be careful in your SoPC design. You must add these peripherals (and respect names):

- NIOS softcore processor without MMU.

- 3 timers:

* 32-bit Timer hrtimer for Xenomai.

* 64-bit Timer hrclock for Xenomai.

* 32-bit Timer sys_clk_timer for µClinux.

Xenomai for NIOS II (without MMU) has been tested on these boards ( http://uuu.enseirb-matmeca.fr/~kadionik/nios2-xenomai/#testing (http://uuu.enseirb-matmeca.fr/%7ekadionik/nios2-xenomai/#testing) )

- Altera Stratix 1S10.

- Altera DE2-70.

- Altera Cyclone III 3C25.

- Altera Cyclone III 3C120.

If you have run successfully Xenomai for NIOS II on your board, please send me by email (kadionik AT enseirb-matmeca.fr) these informations:

- Type of your board.

- The boot traces.

- # cat /proc/cpuinfo

- # cat /proc/interrupts

- the latency value from:

# latency -t2

# cyclictest -n -p 99 -i 10000

An example of report here: http://uuu.enseirb-matmeca.fr/~kadionik/nios2-xenomai/testings/trace_xenomai_1s10.txt (http://uuu.enseirb-matmeca.fr/%7ekadionik/nios2-xenomai/testings/trace_xenomai_1s10.txt)

Sincerely Yours;

Patrice