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mlord

join:2006-11-05
Nepean, ON
kudos:13
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reply to Teddy Boom

Re: Upgrading Firmware on DCM-476 modems

said by Teddy Boom:

said by mlord:

I've also extended the rig functionality to automatically rip firmware from a modem when the SDcard does not have the required "firmware.bin" file present.

Ideally you'd rip both image0 and image1 in this situation, I think..

Yup. The auto-ripper actually saves three files: all.bin, fw1.bin, and fw2.bin. The "all.bin" is a full 4MB image of the entire flash chip, so that it can be restored to pristine state later on if something gets messed up (used that already!).

Cheers

mlord

join:2006-11-05
Nepean, ON
kudos:13
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The new rig in action.
Click for full size
Top side.
Click for full size
Bottom side.
Today I soldered up a version of the flashing rig, for use by a third-party who were nice enough to swap a modem for it. With everything soldered down, and some hot melt on the clip connectors, it might even stay together for a while.


TwiztedZero
Nine Zero Burp Nine Six
Premium
join:2011-03-31
Toronto, ON
kudos:5
+1 Awesome!

MrMazda86

join:2013-01-29
Kitchener, ON
reply to mlord
+1 double awesome!!

That looks like the kind of creation I'd make. Is it home programmed as well, or do you have some kind of pre-programmed firmware for it?

mlord

join:2006-11-05
Nepean, ON
kudos:13
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said by MrMazda86:

+1 double awesome!! That looks like the kind of creation I'd make. Is it home programmed as well, or do you have some kind of pre-programmed firmware for it?

Thanks. It most definitely is "me-programmed" as well, but using the Arduino development tools and libraries.

The fancy blue sub-module is a $3 pre-fab unit off eBay (China). But I just need only the physical card slot from it, and not all of the other stuff. So the built-in 3.3V regulator there is unused, as there's a larger 3.3V regulator on the main board.

Cheers

MrMazda86

join:2013-01-29
Kitchener, ON
said by mlord:

Thanks. It most definitely is "me-programmed" as well, but using the Arduino development tools and libraries.

Haha... Arduinos are quite the handy little things. They're quite versatile really.

mlord

join:2006-11-05
Nepean, ON
kudos:13
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reply to mlord
said by mlord:

The fancy blue sub-module is a $3 pre-fab unit off eBay (China). But I just need only the physical card slot from it, and not all of the other stuff. So the built-in 3.3V regulator there is unused, as there's a larger 3.3V regulator on the main board.

Speaking of which.. I noticed the main regulator getting unusually hot (thus the heatsink). Today I delved into this some more, and discovered it being due to some interaction with the one on the blue sub-module. So I removed the (unused) regulator from the sub-module, and power consumption is now 1/10th of what it was before. Much better.

Cheers

mlord

join:2006-11-05
Nepean, ON
kudos:13
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2 edits

1 recommendation

reply to mlord

Rig #1: going to an ISP.

Rig #2: for myself.
I like the new soldered-up flashing rig so much, that on Sunday I made a second one for myself. Heh heh.. now that it's all so "finished" looking, I'll probably never have another person drop by in need of it!

But I can always re-purpose it as a data-logging rig if need be, and I definitely have uses for those from time to time. The extra header on Rig #2 (top edge) is for the main serial port, so I can reprogram it "in-circuit" when needed, but also for logging serial data from a server (needs external level conversion). And there are enough free "holes" in the perfboard to add a couple more I/O headers for temperature monitors or similar.

Cheers


Teddy Boom
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reply to mlord
said by mlord:

The fancy blue sub-module is a $3 pre-fab unit off eBay (China).

Of course there is an even cheaper way to get an SD card slot. Or, more accurately, a micro SD slot. Just solder up an SD to micro SD adapter

But as you've been saying, the real cost behind a flashing rig are the clips.

Are these cheaper than the ones you found before?
»www.mcumall.com/comersus/store/c···uct=4498

Still not really cheap...
--
electronicsguru.ca

mlord

join:2006-11-05
Nepean, ON
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Those clips say $6.62 for a pair of clips, or $3.31/each.
Digikey sells the (superior!) E-Z-Hook XKM grabbers for $3.01/each.

I like the idea for a cheap micro-SD slot, though!
Full-size slots, like the blue one above, go for under $2/delivered on eBay.
But micro slots are really hard to come by at a reasonable price.

Cheers


Teddy Boom
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Ya, I found that eventually..

There appears to be a variety of generics available.. How bad were the ones you got (from dealextreme I guess?)?

These look a little better than the ones you got, still not good though:
»www.ebay.com/itm/2-x-Grabber-SMD···1be4a176

This guy has a large quantity of Agilent ones for some reason, cheap if you need the numbers:
»www.ebay.com/itm/New-AGILENT-167···2ad#shId

Another seller with the slightly better looking generic:
»www.ebay.com/itm/1-set-4MM-banan···70df3da6

Have you seen this:
»sigrok.org/wiki/Probe_comparison

This was an interesting enough thread, just sticking it here for future reference:
»www.eevblog.com/forum/reviews/ch···gestion/

And linked in that thread, very nice but still not cheap:
»www.ebay.com.my/itm/TEKTRONIX-SM···bb52b8c1

Oh well.. I better get back to work
--
electronicsguru.ca


Teddy Boom
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3 edits
edits....

Here we go.. Zeroplus grabbers for $1 each, unknown shipping:
»siliconkit.com/ocart/index.php?r···t_id=218

and these guys not much more with cheap shipping to US addresses:
»store.nkcelectronics.com/view_cart.asp
--
electronicsguru.ca

mlord

join:2006-11-05
Nepean, ON
kudos:13
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reply to Teddy Boom
said by Teddy Boom:

How bad were the ones you got (from dealextreme I guess?)?

Yes, the generic clips were from dx.com (DealExtreme). I did manage to use them to flash a couple of modems, but the tips on them are about 2X the size of the XKM grabbbers, making it quite difficult to attach them to adjacent pins. And they simply won't fit underneath the DCM-475 heatsinks.

I can give you a handful of them when I return your modems, if you want.
They do make excellent clips for everything except the modems!

Cheers


Teddy Boom
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Ya, a couple would be great, just to see what I think of them
--
electronicsguru.ca

mlord

join:2006-11-05
Nepean, ON
kudos:13
No problem.
I've put two each of five colours (10 in total) into a baggie for you.

Scycotic

join:2012-12-10
lol my dad has a whole bag full of those in the basement from a few decades ago...never knew they were worth that much! Makes me wonder how much the rest of the stuff lying around is worth...