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From: | Tom Rondeau |
Subject: | Re: [Discuss-gnuradio] ZedBoard GNU Radio image boot problems |
Date: | Thu, 4 Sep 2014 10:49:33 -0400 |
Hard float isn't that much faster. It referes to the ARM abi used for
On 09/03/2014 04:30 PM, Nowlan, Sean wrote:
> I'm trying to boot a ZedBoard with the GNU Radio image here: http://gnuradio.org/data/sdk/zedboard_armv7a-hf-vfp-neon/. I picked the hard float image even though the tutorial points to the soft float image (http://gnuradio.org/redmine/projects/gnuradio/wiki/Zynq). I don't know why I'd want the soft float image since using the FPU will be much faster.
>
function calls. Hard float lets you return floats in NEON registers,
which makes functions that return floats faster. Pretty much everything
else is the same. So, it is a win, but not huge, except for certain cases.
Philip
> I followed the directions at the aforementioned tutorial except I renamed "u-boot.bin" to "BOOT.BIN" and "uImage-zedboard-zynq7.dtb" to "devicetree.dtb". I could not get the board to boot. The USB-to-UART triggers cdc_acm to load /dev/ttyACM0 on my Linux host PC, but there is no activity over serial. I'm confident the board is not dead because I am able to boot from the preloaded SD card that came with the ZedBoard development kit. Does anybody have any suggestions? It seems like either some step is missing or I am misunderstanding a step in the tutorial.> _______________________________________________
>
> Thanks,
> Sean Nowlan
>
>
>
> Discuss-gnuradio mailing list
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