Re: [Xc3sprog-users] Xilinx Spartan-3A-DSP SPI programming issues

[Tomek C. <tom...@gm...>]

Hello Uwe, thank you for your support :-) Things has changes in
xc3sprog since 449 release... :-)

On Mon, Aug 29, 2011 at 7:38 PM, Uwe Bonnes
<bo...@el...> wrote:
> Bitrot: You have a working program on your disk, and trying to use it after
> some time, nothing works any longer: Libraries have changed, compilers get
> strikter, API changed, etc
> http://en.wikipedia.org/wiki/Bit_rot#Problems_with_software

Ah well this is why I definitely switched to FreeBSD - its not lazy
Windows and its not Linux where things never work after week ;]


> Something is fishy here.
> Are you sure you don't have some flaky JTAG or SPI connection, a ringing
> JTAG cable, some heavy noise source, too low supply voltage, a
> microcontroller addressing the SPI lines after some time or something else?

I can program bitfile directly into FPGA with no problem. The only
problem is with uploading bitfile into SPI Flash.

> Test the JTAG chain with the -T0 option, and probably -I -T0 should test
> both JTAG and SPI.

-T0 works fine but -I requires a filename so -I -T0 will not work in
635 release. The connection is fine :-)

> As explained before, define your cable in cablelist.txt.
>
> Slow down only helps in rare cases. E.g. a ringing TCK line may show double
> clocking even on slowest JTAG frequencies, as ringing happens at the edges,
> with edge rates remaining the same. With an on-board connector I didn't see
> problems up to the max JTAG frequency of the slowest device, and AVR with 8
> MHz in my case. Cable connected adapters are something different.
>
> Try
> <your cable>          ftdi    <your VID>:<your PID>:       1500000

This did not work

> <your cable>          ftdi    <your VID>:<your PID>::1:0x00:0x10:0x00:0x0 1500000

This is working! Thank you for help in calbe configuration :-)

Now I have problem to upload bitfile into flash. In older release I
have first uploaded bscan_spi.bit into FPGA, then again started
xc3sprog with -I mybitfile to pass this bitfile into SPI memory using
bscan_spi.bit, but in the new release things seems different and I can
only upload into FPGA. I have tried xc3sprog -v -c amontec
bscan_spi.bit; xc3sprog -v -c amontec -I mybitfile.bit and this did
not work, neither xc3sprog -v -c amontec bscan_spi.bit -I
mybitfile.bit ... Please advise how to upload mybitfile into spi flash
:-P :-)

Best regards,
Tomek

>
> The new scheme works better for people with standard cables, and custom
> cables are added more easy.
>
> Sorry that things work so hard with the end for your diplome work nearing...
>
> Bye
> --
> Uwe Bonnes                bo...@el...
>
> Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
> --------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------
>



-- 
CeDeROM, SQ7MHZ, http://www.tomek.cedro.info