[Xc3sprog-users] Add Virtex6 support - patch 1/1

[Matthew L. <li...@bu...>]

Hi all,

Attached is a patch that adds support of programming Xilinx Virtex6
devices to xc3sprog. Patch is based on r658 (current version I synced with
this morning). Changes were minimal (as expected) however with the device
I had (550T), I had to skip waiting for the reconfiguration step in
ProgAlgXC3S::array_program(), ie skip doing:

jtag->shiftIR(JPROGRAM, NULL);
do
   jtag->shiftIR(CFG_IN, buf);
while (! (buf[0] & 0x10)); /* wait until configuration cleared */

..otherwise I waited forever. Not sure why this is.

I think there's also a bug in function ProgAlgXC3S::flow_enable() too. A
byte array of data[1] is shifted through shiftIR() 5 times but as data[]
is only 1 byte in size and shiftIR() indexes into the pointer using i++,
this will read uninitialised memory. I've switched it to use data[5] and
memset it to zero before doing the shiftIR operation.

As a side note, I'm also able to reliably program the device using my FTDI
4232 running at full speed (30MHz). This is faster than the Xilinx tools.
Nice :-)

Cheers,
--  Matt