Hello
I?m trying to use the PicoBlaze JTAG Program Loader supplied with the PicoBlaze package to download a new ROM contents. But I don?t seem to get the new ROM down to my FPGA.
Do any of you have some advise?
Thanks
where are you stuck? did you rename the jtag_loader_rom_form.vhd into rom_form.vhd and copied into the assembler dir? you should then get special rom file that includes BSCAN, if you now build the Picoblaze system and download that to the FPGA then the ROM should be accessible over JTAG using the supplied tools. I think the version as shipped doesnt work on V4 but I guess you should have got synthesis error if you are targetting V4
or did you have problem converting the hex into XSVF? or did you have errors during XSVF file execution?
Antti
"Elektro" schrieb im Newsbeitrag news:4256b12d$0$43988$ snipped-for-privacy@news.sunsite.dk...
Hello
Yes, I used the "JTAG_Loader_ROM_form.vhd" file and made the changes to include a reset signal.
But I think I maybe know what I made wrong.
After I ran the JTAG bat-file I pressed the reset button on the Spartan 3 Evaluation Board, and by doing that the FLASH memory contents was again loaded into the FPGA (fith the original PicoBlaze ROM). :-/
I can't confirm this until Monday, but does it seem likely?
And what should I answer when the JTAG_loader.bat ask:
"How many JTAG devices are before the PicoBlaze FPGA in your chain ? >"
Should I answer 1 because in the iMPACT-tool the FPGA is the first device and the second device is the FLASH-memory?
And when it asks:
"How many JTAG devices are after the PicoBlaze FPGA in your chain ? >"
Should I answer 1 because there is one devide after the FPGA in the JTAG chain?
"Antti Lukats" skrev i meddelandet news:d36dnk$p2o$00$ snipped-for-privacy@news.t-online.com...
get
"Elektro" schrieb im Newsbeitrag news:4256f0c0$0$43985$ snipped-for-privacy@news.sunsite.dk...
you must load the design with jtag_rom befroe running the .bat file and sure dont reconfig after that
but be aware that the .bat file that downloads the picoblaze does not error checking at all, it reports all ok also when no FPGA is attached, so you must be sure that the xsvfplayer really can connect to the cable, etc
0, if FPGA is first
yes, 1
build
JTAG
Hello
device
It should have said 0, I just thought wrong here at home :-)
Thank you for your advice.
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