[meta-xilinx] no led on zedboard

[Peter Crosthwaite]

On Sat, Nov 28, 2015 at 3:01 PM, Edward Vidal <vidal.develone at gmail.com> wrote:
> Hi Peter,
> Thanks for the quick reply.  I have been working on Spartan 6 with
> StickIt-MB & XulA2-LX9 with RPi2B. I am new on the zedboard and have not
> used XSDB or XMD.
> Do these require JTAG? I do not have a working one.
>

Yes they do. But sometimes you can use a program like devmem or
peekpoke (not sure if these exist by default in Yocto - Nathan will
know more) to directly bang on hardware registers from a Linux shell.
Both work using an mmap of /dev/mem which lets userspace do raw IO
access (root is required on the target system).

> With the Diligent kernel 3.6, I saw the Leds working.
>
> I am running on a Ubuntu 12.04 with Xilinx 14.6 and Vivado 2013.4 an my
> evaluation has expired.  I can run xps, ise, vivado.
>
> Do you think I need to add to analog devices reference design?
> git://github.com/analogdevicesinc/fpgahdl_xilinx.git
> 3e6cfd4858635e49ea131da1bb4b7b6dd258280b version
>

Don't know much about the hardware side of things unfortunately.

Regards,
Peter

>
> Regards
>
> On Sat, Nov 28, 2015 at 1:47 PM, Peter Crosthwaite
> <crosthwaitepeter at gmail.com> wrote:
>>
>> On Sat, Nov 28, 2015 at 11:08 AM, Edward Vidal <vidal.develone at gmail.com>
>> wrote:
>> > Hello all,
>> >
>> > Trying to turn on  the leds on my zedboard.
>> > I created a module see the
>> >
>> > filehttps://github.com/develone/zedboard_yocto/blob/master/leds/myled_modules_notes.txt.
>> >
>> > I used analog device reference design and meta-topic.
>> >
>> > I can see load the module and I see items referencing the led in both
>> > /proc
>> > & /sys
>> > see the
>> > myled_modules_notes.txt.
>> >
>> > Any and all help is appreciated.
>> >
>>
>> Hi Edward,
>>
>> The doc you link looks to only cover the software side of it. The
>> other source of error is the hardware of which a number of issues
>> could cause your design to not work. Have you attached to the ARM
>> processor over XSDB or XMD to turn the LED on and off using register
>> accesses (mwr and mrd in XMD)? This can definitively validate that the
>> hardware works and the issue is indeed in the software stack.
>>
>> Regards,
>> Peter
>>
>> > Cheers,
>> >
>> >
>> > --
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>> >
>
>