So, after finally finding some to time to desolder the pain in the arse heatsink, I annoyingly find my nand chip in my R8000 isn't Macronix brand but Spansion as shown in bottom left of picture attached.
Interstingly though there is some kind of header to the right of that Spansion nand chip, can anyone confirm it could be a JTAG header?
I've found some details about the Spansion chip pinouts I'll post shortly for future reference for anyone in dire need.
Hopefully I can look at shorting some pins to force it back into TFTP recovery so I can get a ping back from the ETH interfaces.
Last edited by Galactus on Fri Feb 21, 2020 9:29; edited 2 times in total
Joined: 16 Nov 2015 Posts: 3782 Location: UK, London, just across the river..
Posted: Fri Feb 21, 2020 11:30 Post subject:
https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=905204#905204 yep on this link, you've shared...there are pretty clear instructions, how to serial flash that buddy (R8000)...even if CFE is corrupted there is a 'how to' ... i do not poses this router, and i do not know any other ways than TFTP flash or serial recovery, to recover a bricked unit...
usually CFE could be corrupted or bad flash, like flashing something else or hardware failure...or dead capacitor...try to explore those options first...
also do in mind those instructions from the link above, date back in 2014 so, use a build from that era could be a plus, once up and running you could update to a most recent...
He can’t flash it using serial because it stops at waiting for reset button release. It never gets to the point we’re he can stop the cfe and flash using tftp.
The only recourse is probably desoldering the chip, reprogramming and soldering it back on. _________________ I am far from a guru, I'm barely a novice.
Cheers for the feedback Alozaros, problem I've got is tftp is toast. I get a network link light but no ping.
Tried a network sniffer so nothing seems to be responding on the ethernet interfaces.
I'm facing the exact same issue as the thread starter.
Basically from bad advice from a reddit thread which I linked earlier in this thread. I installed what I thought was an updated netgear r8000 AC3200 which turned out to be an ASUS RT-AC3200 firmware.
My own very stupid mistake.
So although it boots and I can see CFE loading in Xterm, I cant break into it with CTRL-C so having to take the drastic option as I'm getting Waiting for wps button release... which I guess has caused GPIO to reroute for the WLAN button.
Holding downing any and all button sequences (Reset, WLAN, WPS) doesnt halt the CFE boot.
CFE version 126.96.36.199 (r527781) based on BBP 1.0.37 for BCM947XX (32bit,SP,)
Build Date: Fri Aug 11 08:07:07 CST 2017 (defjovi@ubuntu-eva01)
Copyright (C) 2000-2008 Broadcom Corporation.
Boot partition size = 262144(0x40000)
DDR Clock: 400 MHz
Info: DDR frequency set from clkfreq=1000,*800*
Warning: invalid DDR setting of 800 MHz ignored. DDR frequency will be set to 400 MHz.
CPU type 0x0: 1000MHz
Tot mem: 262144 KBytes
Just came across these threads today from Koolshare Chinese Asus/Negear forum of someone having a similar ballache to me, although its for a R7000 router which isnt too dissimilar, the user has ended up with the same situation of waiting for WPS button release from install asus merlin firmware on his R7000.
Using google chrome to translate so hopefully I can make something out of this guys support which looks promising although, a lot of it is lost in translation..heh
Usually the boot process is stopped after the waiting fir reset button release point.
I have no idea why. I’ve unbricked dozens and dozens and dozens of routers using serial, maybe more, so I know how to do it.
Offer to pay for the shipping if he is going to throw it away and maybe you can waste your time trying since you don’t seem to believe me. _________________ I am far from a guru, I'm barely a novice.