Re: [OpenOCD-devel] artix-7 + spi flash programming

[Forest C. <cy...@gm...>]

Hi, Enrico,

I haven't done it on an Artix-7, but I've programmed the config flash of a
Spartan-6 with OpenOCD and the process should be similar. First you need to
load the SPI proxy bitstream (generated by this Migen script
<http://repo.or.cz/openocd.git/blob/12aee423db1aa1d315392dbaa60122c871054714:/contrib/loaders/flash/fpga/xilinx_bscan_spi.py>,
with pre-built bitstreams available here
<https://github.com/jordens/bscan_spi_bitstreams>), then you can program
the flash using the jtagspi helper commands. An example of how to do this
for the Spartan-6 can be found in the Pipistrello config
<http://repo.or.cz/openocd.git/blob/804eefc25954465a35e63abc272862169dbf4b9b:/tcl/board/pipistrello.cfg>.
For the Artix-7, you should only have to change "xc6s" to "xc7" and replace
the proxy bitstream (bscan_spi_xc6slx45.bit) with the one for your specific
FPGA.

Your script will probably look a bit like this:

source [find your-jtag-interface-config-here.cfg]
source [find cpld/xilinx-xc7.cfg]
source [find cpld/jtagspi.cfg]

init  # Initialize OpenOCD.

jtagspi_init 0 bscan_spi_xc7a35t.bit  # Load the proxy bitstream for the
Artix-7 35T.
jtagspi_program your-bitstream-here.bin 0  # Flash the binary bitstream.
xc7_program xc7.tap  # I'm not actually sure if this is needed.

exit  # We're done here.

Hope this helps!

On Thu, Nov 2, 2017 at 12:49 PM, Enrico Weigelt, metux IT consult <
in...@me...> wrote:

> Hi folks,
>
> does anybody here have some success in programming an
> spi flash behind an artix-7 via jtag ?
>
>
> --mtx
>
> --
> Enrico Weigelt, metux IT consult
> Free software and Linux embedded engineering
> in...@me... -- +49-151-27565287
>
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