On 03/11/2020 18:40, Cyril.Jean@xxxxxxxxxxxxx wrote:
On 11/3/20 6:28 PM, Ben Dooks wrote:
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On 03/11/2020 18:10, Cyril.Jean@xxxxxxxxxxxxx wrote:
On 11/3/20 3:07 PM, Atish Patra wrote:
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On Fri, Oct 30, 2020 at 2:20 PM Ben Dooks
<ben.dooks@xxxxxxxxxxxxxxx> wrote:
,snip[
@Cyril : Can we enable both eMMC & sdcard at the same time ?
I would put /both/ in but only enable the one in use for the moment.
Our boards are booting of eMMC as supplied, so this isn't going to
work
as well. The eMMC is 8bit wide, and thus is only delivering 11MB/sec
instead of 22MB/sec. This performance is still not great, but losing
half the data-rate is just not good.
I am not sure what should be enabled by default. Updating sdcard is
much
easier than eMMC card and we use that approach.
@Cyril: Is there a way that we can enable both ?
Yes, we can enable both but this requires a modification to the FPGA
design. One of the guys prototyped this while I was away. We will move
this along. This will require reprogramming the FPGA with a new design
and HSS version.
Regards,
Cyril.
I either missed or couldn't find a way of forcing the boot mode to be
from the SD slot. Have I missed something? At the moment we'd like to
have more storage available as the ~7G free on the eMMC is not enough.
Currently, you need to program a different FPGA bitstream on the board
to boot from SD-card. The different bitstream configures muxes on the
board to connect the SD slot to the FPGA and the HSS included in the bit
stream configures the FPGA IOs correctly.
Links to the programming files are found in this document:
https://github.com/polarfire-soc/polarfire-soc-documentation/blob/master/boards/mpfs-icicle-kit-es/updating-icicle-kit/updating-icicle-kit-design-and-linux.md
Thanks, but i've no way of remotely re-writing the bitstream
of the FPGA since the tools are x86 only and we're using a Pi3
to connect the boards we have to the network.
--
Ben Dooks http://www.codethink.co.uk/
Senior Engineer Codethink - Providing Genius
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