Products > Test Equipment
MSO2000 Application module hack
timb:
--- Quote from: computer7geek9 on March 01, 2016, 10:04:22 am ---
--- Quote from: timb on March 01, 2016, 09:33:05 am ---One would think that it wouldn't overwrite the boot loader first, but I don't know exactly how the upgraded works. It obviously copies the installer into to ram. Judging by the white screen and lack of serial data, I suspect it may wipe flash before copying the new bootloader and OS over.
If this is the case, the machine obviously wiped the flash and then encountered a silent error while copying the new data over.
If that's the case, then the only way to get the thing going may be through some sort of JTAG process.
--- End quote ---
In fwUpdate.sh it talks about uBootExtract Tool (line 326) checking the bootloader on the device and on the update. It says "If we can't extract the version from the scope, then update." But since it is clearly not getting to this step, do you know how to JTAG the bootloader partition (in bootloader.img I assume) to the partition /dev/mtd0 (line 53). I have never loaded anything through JTAG.
--- End quote ---
That's what I'm going to find out. I have extensive experience with uBoot. I'm hoping that the uBoot partition (mtd0) is still intact, in which case it may be a simple matter of finding an additional pair of pads on the main PCB (a debug console) that uBoot either outputs data to or takes data from.
In which case, we can either command uBoot to look at the USB port or replace it with a working copy.
I'm going to extract the firmware now and deconstruct the bootloader and figure out the partition arrangement.
More info soon.
computer7geek9:
Perfect. When I disassembled mine I noticed quite a few headers (with pins luckily) but didn't pay any attention to them as I just wanted to hookup uart. I will do some research on uBoot so I can hopefully understand anything you figure out haha
DiodomanX:
If anyone want the patched firmware sendme a PM please .
Enviado desde mi XT1563 mediante Tapatalk
luisprata:
timb,
I look forward to more info about uboot.
Luis.
luisprata:
Looking at console messages side by side with scope screen:
https://www.youtube.com/watch?v=0DUYwDC8nN0&feature=youtu.be
1) Blank screen
2) Uboot messages
3) Splash screen
4) Uboot loads kernel
...
So, no splash screen may indicate a bootloader partition (uboot) failure...
Is there an easy way to reprogram firmware ?
Or only using http://www.nxp.com/products/interface-and-connectivity/wireless-connectivity/sub-1-ghz-wireless-solutions/universal-multilink-fx-high-speed-development-interface:U-MULTILINK-FX ?
Luis.
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