AW: device-tree example for altera-cyclone-v bsp

Jan.Sommer at Jan.Sommer at
Thu Feb 14 13:37:42 UTC 2019

Hi Christian,

If your change is only regarding to the clock frequency then it should be possible to simply pass the value to configure:

configure --target=arm-rtems4.12  --enable-rtemsbsp=altera-cyclone-v BSP_ARM_A9MPCORE_PERIPHCLK=10000000U

At least that is what we do with the microzed board.



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Jan Sommer
Telephone +49 531 295-2494 | Telefax 0531 295-2767 | jan.sommer at

> -----Ursprüngliche Nachricht-----
> Von: users [mailto:users-bounces at] Im Auftrag von Christian
> Spindeldreier
> Gesendet: Donnerstag, 14. Februar 2019 13:55
> An: Sebastian Huber
> Cc: users
> Betreff: Re: device-tree example for altera-cyclone-v bsp
> Hello Sebastian,
> we had to change the BSP_ARM_A9MPCORE_PERIPHCLK frequency to 100
> MHz as
> this is the frequency the L4 MP clock is set by Qsys or the SPL,
> respectively. This meant adding a second board to the altera-cyclone-v
> bsp differing only by this configuration option. Adapting the
> configuration as described enabled the upstream RTEMS-5 version to boot
> on the Terasic-DE10 Standard Board (
> U-Boot itself contains a device-tree of the board it is running on, but
> i missed the u-boot command handing over the u-boot device-tree to rtems
> which expects the device-tree address in R6 on startup. If there is
> anything like this i am pleased on any information on it.
> Best Regards,
> Christian
> Using the described settings we
> On 13.02.19 19:57, Sebastian Huber wrote:
> > Hello Christian,
> >
> > I add the BSP section to the user manual today. Unfortunately, I was not
> able to commit it. I tested also the latest RTEMS on the Cyclone V SoC
> Development Kit and it worked fine. Does it now run on your board? The
> device tree is normally provided by the U-Boot.
> --
> Dipl.-Ing. Christian Spindeldreier
> Leibniz University Hannover (LUH)
> Institute of Microelectronic Systems
> Architectures and Systems Group
> Appelstr. 4, 30167 Hannover, Germany
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> users at

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