[UrJTAG-dev] current hardware experiences

[Steve F. <ste...@ie...>]

Hi again.  I thought I'd check the current state of my available
hardware, since I have a healthy stockpile of dongles.

I just rebuilt the latest SVN (1345).

1) cable ARM-USB-OCD : perfect.  No issues, great experience.  I use
this on a daily basis.  Target is a Xilinx XC3S50AN-TQ144, which I
think I'm getting the definition for out of the bsdl file; haven't
messed with it in some time - it just works.

2) cable xpc_ext: slow - we know this is the case because the
necessary reverse-engineering of the protocol has yet to be done, and
we're just bit-banging the thing, AFAIK.  No complaint there.  The one
thing I would suggest we look into is that the Xilinx tools always
kick a "frequency" command into their svf's, which used to blow the
thing up, but now just hangs it.  Short of making a script or tweaking
a makefile to parse the "freq" lines out of the svf, just ignoring
freq for the xpc would be preferable, I think.

jtag> cable xpc_ext
firmware version = 0x0404 (1028)
cable CPLD version = 0x0012 (18)
jtag> detect
IR length: 6
Chain length: 1
Device Id: 00000010011000010000000010010011 (0x0000000002610093)
  Filename:     /usr/share/jtag/bsdl/xc3s50an.bsd
jtag> svf DntGpsBit.svf progress
requested frequency 1000000, now calibrating delay loop
new real frequency 1285.47, delay 1000

!!hangs at least 10 minutes here!!

If there's anything I can do to expedite this, please say so.

3) cable jlink still coredumps for me (note: I have two jlink dongles,
both are a couple years old).  I'd be happy to do some debugging here,
if someone would point me in the right direction...since I'm on BSD
instead of linux, I do seem to see different errors out of libusb from
time to time.

$./jtag
UrJTAG 0.8 #1345
<...>
jtag> cable jlink
J-Link initial read failed, don't worry (result=-60)
Vref = 3.37 TCK=1 TDI=1 TDO=1 TMS=0 TRES=1 TRST=0
J-Link JTAG Interface ready
usb_bulk_read failed (requested=1, result=-60)
jlink_tap_execute, wrong result -1, expected 1
usb_bulk_read failed (requested=1, result=-60)
jlink_tap_execute, wrong result -1, expected 1
jtag> detect
usb_bulk_read failed (requested=2, result=-60)
jlink_tap_execute, wrong result -1, expected 2
Segmentation fault: 11 (core dumped)
$./jtag
<...>
jtag> cable jlink
J-Link initial read failed, don't worry (result=-60)
Vref = 3.26 TCK=1 TDI=0 TDO=1 TMS=1 TRES=1 TRST=1
J-Link JTAG Interface ready
jtag> detect
Segmentation fault: 11 (core dumped)

Best,
Steve