RQH
@covad.net | reply to mazilo
Re: [General] DLink VTA-VR
Interesting, can any of you guys please tell me at least how to login with ssh? Do I need a EPROM tools. Can we connect a JTAG or serial port to see what happen there? Thanks |
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mazilo
From Mazilo
Premium
join:2002-05-30
Lilburn, GA
| reply to hoolahoous
Re: bricked mine too :(
said by hoolahoous  :i do not have access to serial cable and do not wish to spend money to revive this free after rebate box.. If you have a Maxim3232 chip, you can build this cable to interface with your device to de-brick. You can also build this unbuffered JTAG cable and perhaps use it to interface your device, too.
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Mazi (UK Non-Geo Phone: +44-703-194-2574) |
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mazilo
From Mazilo
Premium
join:2002-05-30
Lilburn, GA
| reply to hieppo
Re: VTA failsafe - recovery options
said by hieppo :Help, where can I find the 3.3V source if I connect one of these serial console to the DLINK VTA? I believe you will need a JTAG cable to do this that has a built-in voltage converter to convert whatever voltage on a serial port to a 3.3V. Without this, you will burn your VTA-VR. Do a search on Google for JTAG. Then, do a search here on the PINs layout for this VTA-VR.
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Mazi (UK Non-Geo Phone: +44-703-194-2574) |
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mazilo
From Mazilo
Premium
join:2002-05-30
Lilburn, GA
| reply to hoolahoous
said by hoolahoous :i have a dead vta, anyone in bayarea has a JTAG cable I can borrow ? You can easily build your own and very simple (unbuffered) JTAG cable as shown here. No one has done this yet, so let us know if this will work. Good luck.
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Mazi (UK Non-Geo Phone: +44-703-194-2574) |
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Paranoid
@co.uk
| reply to piranhaphish
Re: [General] DLink VTA-VR
said by piranhaphish :You can downgrade your firmware to 11.4.0-r060331-1.00.07-r060418.img and unlock it with CYT from there. This is my problem. I've tried everything I've read in the thread and cannot find a way to downgrade the firmware. It currently has VTA-11.4.1-r060815-1.00.09-r070401.img installed.
I've just ordered a JTAG lead, but this will take 10 days to arrive so in the mean time I'm hoping someone finds a way to hack my version of the firmware. |
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piranhaphish
join:2008-02-03
Midland, TX
| said by Paranoid :said by piranhaphish :You can downgrade your firmware to 11.4.0-r060331-1.00.07-r060418.img and unlock it with CYT from there. This is my problem. I've tried everything I've read in the thread and cannot find a way to downgrade the firmware. It currently has VTA-11.4.1-r060815-1.00.09-r070401.img installed. I've just ordered a JTAG lead, but this will take 10 days to arrive so in the mean time I'm hoping someone finds a way to hack my version of the firmware. I had the same problem. But I was able to downgrade the firmware using a serial console (see the previous page for more info). You have to make or buy a MAX232 circuit, but this is fairly easy; you can build it in an hour with any soldering iron if you can find the parts at a local electronics retailer. I followed these nice instructions.
As was explained to me, and as was the case, there are two firmware slots on these devices, A and B. Mine, like yours, was booting and using image B while the web interface only appears to update image A. Updating B from the bootloader (using the serial cable) worked and got me downgraded finally.
Unfortunately, there doesn't seem to be a way to tell the device to boot image A, which would be the easier way out. You can set the default to image A in the bootloader, but it resets it to B on reboot. |
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Paranoid
@co.uk
| reply to mazilo
How to boot different images.
I've seen several posts on here about the VTA only booting from IMAGE_B which means you have to destroy you current firmware and config when you want to upgrade/downgrade. I've found a way to boot from either image. Its as follows...
First you need to connect to the console using a JTAG lead and get to the boot prompt. If you execute printenv you will see the following definitions:
BOOTCFG_A m:f:"IMAGE_A"
IMAGE_A 0x90040000,0x90400000
CONFIG_A 0x90400000,0x90420000
BOOTCFG_B m:f:"IMAGE_B"
IMAGE_B 0x90440000,0x90800000
CONFIG_B 0x90420000,0x90440000
BOOTCFG m:f:"IMAGE_B"
On mine the BOOTCFG is read only but the first thing you could try is altering this to either m:f:"IMAGE_A" or m:f:"IMAGE_B" and that might work for you. If it doesn't then all you have to do is swap the the definitions for the A and B images and configs. With the above settings it would mean executing the following commands
setenv IMAGE_A 0x90440000,0x90800000
setenv CONFIG_A 0x90420000,0x90440000
setenv IMAGE_B 0x90040000,0x90400000
setenv CONFIG_B 0x90400000,0x90420000
Now, when you boot it will boot the other image. |
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mazilo
From Mazilo
Premium
join:2002-05-30
Lilburn, GA
| said by Paranoid :
First you need to connect to the console using a JTAG lead and get to the boot prompt. This is interesting. I never knew a JTAG cable can get you to a boot prompt. Are you sure you were confused with a USB/Serial-console cable? |
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Paranoid
@co.uk
| said by mazilo :This is interesting. I never knew a JTAG cable can get you to a boot prompt. Are you sure you were confused with a USB/Serial-console cable? Probably. I found out how to build the cable by searching for JTAG, but that doesn't mean the cable I actually built was a JTAG. It's whatever you use to connect to the serial port inside the VTA box. |
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yahoo2003
join:2007-11-02
Mclean, VA
| reply to Velund
Re: [General] DLink VTA-VR
said by Velund :Thank you for your reply.. Unfortunately, bootloader is not accepting ESC on startup, just continues to boot main firmware.... What is a good news (at least for me), EON flash chip that I see there is supported by device programmer that I have at work, and I'm almost sure that we have correct adapter for TSOP-48, so as a last resort I can try to remove flash and blank firmware partitions there (I hope, bootloader will enter their command prompt after "OS boot fail"). I would used JTAG rather than de-solder the chip
»[General] DLink VTA-VR |
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