JTAG-ing - Anyone able to advise?

Andy Burns wrote:

Java Jive wrote:

For example (quite expensive) ...
http://www.diygadget.com/tiao-usb-mu...2c-serial.html

Looks like a handy card to have around, especially as I've mislaid my
USB to TTL level RS232 dongle, there is a cheaper "lite" version of the
TUMPA

http://vgshop.ecrater.co.uk/p/157748...otocol-adapter

Mind you, USB TTL cables cost £1 if you don't mind waiting the few weeks
for one to turn up from China.

http://www.ebay.co.uk/itm/251586127898

I use one for Arduino Pro microcontroller card clones, which cost £1.36
inc P&P, which seems an impossible price. But they work fine.

http://www.ebay.co.uk/itm/131268582572

Dave Farrance wrote:

Arduino Pro microcontroller card clones, which cost £1.36 inc P&P,
http://www.ebay.co.uk/itm/131268582572

I suppose at that price, you can understand why the "row needles didn't
welding", it comes to something when a bit of soldering would break the
economics of the product, even at Chinese labour rates ...

On Wed, 24 Sep 2014 21:13:06 +0100, Andy Burns
wrote:


I suppose at that price, you can understand why the "row needles didn't
welding", it comes to something when a bit of soldering would break the
economics of the product, even at Chinese labour rates ...

Noticed that - think it is more to do with the packaging - instead of
couple of mm thickness it becomes 15-20mm with sharp spikes...

In uk.comp.os.linux Geo wrote:
On Wed, 24 Sep 2014 21:13:06 +0100, Andy Burns
wrote:

I suppose at that price, you can understand why the "row needles didn't
welding", it comes to something when a bit of soldering would break the
economics of the product, even at Chinese labour rates ...

Noticed that - think it is more to do with the packaging - instead of
couple of mm thickness it becomes 15-20mm with sharp spikes...

The rest of the board is single-sided SMD, so will do fully automated
assembly: sheet of boards on conveyor into pick and place machine, P&P from
reels of about a dozen components, into reflow oven, dice them up, done.
The pins would probably be hand soldered, which is an extra manual step, and
there are a lot of joints for each board.

Something like that can probably do a hundreds/thousand an hour, on a fairly
cheap and basic line. If you're lucky they might put them on a test jig,
but I wouldn't count on it...

Theo

"Bill Wright" wrote in message
...
Java Jive wrote:
I have a QNAP NMP-1000, it's a network media player. It's no' bad,

Can we avoid this sort of pseudo-Scottish idiom from now on? If you're
going to remain as part of the UK I think it would be better if you
communicated in Home Counties English only.

Bill

Eeh bah gum Bill, dae they ken that oop in't [Yorkshire] dales?

On 24 Sep 2014 19:18:24 +0100 (BST), Theo Markettos
wrote:

In uk.comp.os.linux Java Jive wrote:

One thing that worries me is that the pitch seems to be exactly 2mm,

It's a fairly common item, such as:
http://uk.farnell.com/samtec/tmm-107...way/dp/1668542
(which is way expensive for what it is, but never mind)
You can buy these on strips and cut them down to length if you need.

Always been a bit wary of Farnell, but nevertheless tried to order.
Turned out minimum CC order is £20, which reminded me why I was
sceptical about them! Will have to look elsewhere, perhaps he

http://www.topqualitytools.co.uk/hea...107-01-g-d-sm/

Just use leaded solder. Tack two corners of the connector down to hold it
in place with a small amount of solder, then solder each of the pins.

You make it sound so simple :-)

I would imagine the various upgrade images available from QNAP would
be entire and complete, and would work, if I can just get the JTAG
hardware side of things together.

If it does a 'dd' into the partitions you're OK, if it untars things then
maybe not.

Had a look at two. Could only find clear text in the last 60-70 or so
bytes, so I suspect they're tar-ed and/or encrypted. See below ...

For example (quite expensive) ...
http://www.diygadget.com/tiao-usb-mu...2c-serial.html
...
Likewise it looks like OpenOCD supports
the FT2232 like in the first board.

After some reading around, beginning to favour this more expensive
option.

The other things you need to find:
Will OpenOCD work with your SoC? Is there a boundary scan pin definition file
about?

Pretty close. The OpenOCD download includes an SMP8634 definition
file, as appended, which hopefully will do. Would have expected to
find such essential data on the Sigma website, but there is barely a
mention of the SMP8635 there, actually there is more about the
SMP8634. I do hate it when manufacturers clear from their sites
essential data relating to legacy products.

Is there a script/code to flash the Spansion flash chip via the boundary
scan?

No progress on this yet, but have found a datasheet for it:

http://www.spansion.com/Support/Data...S29GL-P_00.pdf

Can you assemble an image of what the flash should look like? This is a raw
reflash, so it knows nothing about partitions for instance.

If not, I could just put Debian or Slackware on it, probably to be
loaded off a USB stick, with either Open NMP or XBMC.

OpenOCD's smp8634.cfg
================
# script for Sigma Designs SMP8634 (eventually even SMP8635)

if { [info exists CHIPNAME] } {
set _CHIPNAME $CHIPNAME
} else {
set _CHIPNAME smp8634
}

if { [info exists ENDIAN] } {
set _ENDIAN $ENDIAN
} else {
set _ENDIAN little
}

if { [info exists CPUTAPID] } {
set _CPUTAPID $CPUTAPID
} else {
set _CPUTAPID 0x08630001
}

adapter_nsrst_delay 100
jtag_ntrst_delay 100

reset_config trst_and_srst separate

# jtag scan chain
# format L IRC IRCM IDCODE (Length, IR Capture, IR Capture Mask,
IDCODE)
jtag newtap $_CHIPNAME cpu -irlen 5 -ircapture 0x1 -irmask 0x1

set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME mips_m4k -endian $_ENDIAN -variant
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On Fri, 26 Sep 2014 00:13:45 +0100
Java Jive wrote:

Always been a bit wary of Farnell, but nevertheless tried to order.
Turned out minimum CC order is £20, which reminded me why I was
sceptical about them! Will have to look elsewhere, perhaps he

I think you'll find that just for free delivery. They used to do free delivery
on all orders, but there were so many people taking the **** with 50p worth of
resistors etc. that they were actually losing money. They are now in line with
firms like RS, who have always had a £20 min for free delivery.

--
W J G

No, it's the minimum order for a non-trade account.

On Fri, 26 Sep 2014 17:05:40 +0100, Folderol
wrote:

I think you'll find that just for free delivery.
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http://www.macfh.co.uk/Macfarlane/Macfarlane.html

In uk.comp.os.linux Java Jive wrote:
Always been a bit wary of Farnell, but nevertheless tried to order.
Turned out minimum CC order is £20, which reminded me why I was
sceptical about them! Will have to look elsewhere, perhaps he

CPC are the bit of Farnell with free delivery, but they don't carry that
part.

http://www.topqualitytools.co.uk/hea...107-01-g-d-sm/

That's just someone who orders from Farnell and resells - postage is
excessive but it's an option. I didn't try looking elsewhere, there are
probably other places too.

Can you assemble an image of what the flash should look like? This is a raw
reflash, so it knows nothing about partitions for instance.

If not, I could just put Debian or Slackware on it, probably to be
loaded off a USB stick, with either Open NMP or XBMC.

You'd still need to assemble a valid flash image, including missing
bootloader.

OpenOCD's smp8634.cfg

That just tells it what kind of CPU it has. You need data that says how
to wiggle each pin in the thousands-bit boundary scan chain. For example:

--BSC group 208 for unused pad
"624 (BC_4, *, internal, X)," &
"625 (BC_4, *, internal, 1)," &
"626 (BC_4, *, internal, X)," &

--BSC group 209 for I/O pin 67
"627 (BC_4, IO67, input, X)," &
"628 (BC_1, *, control, 1)," &
"629 (BC_1, IO67, output3, X, 628, 1, Z)," &

--BSC group 210 for I/O pin 66
"630 (BC_4, IO66, input, X)," &
"631 (BC_1, *, control, 1)," &
"632 (BC_1, IO66, output3, X, 631, 1, Z)," &

which is taken from this BSDL file (for a randomly selected Altera chip):
ftp://ftp.altera.com/outgoing/downlo...M1270ZT144.bsd

It's possible to use the file you have to access the CPU's debug unit and
load bare-metal code in from there, and then get that to do the reflash, but
it would have to be code that knows about how to write flash on the SMP8635
- more complex than using JTAG bounary scan to wiggle the pins.

Unless you can find someone who has done this before and described the
process, or decent data on the chip, I think you're out of luck I'm
afraid.

Theo

Andy Burns wrote:

Java Jive wrote:

http://www.diygadget.com/tiao-usb-mu...2c-serial.html

Looks like a handy card to have around, especially as I've mislaid my
USB to TTL level RS232 dongle, there is a cheaper "lite" version of the
TUMPA

Just to mention, I id order one of of the tumpa-lite cards, and it
arrived today, I've still got to solder on its connector pins, then I'll
have a play with JTAGing an old router ... could be the sort of card I
hardly ever use, but cheap enough to have around in case it ever saves
the day ...