[SOLVED] Unknown or NO CPU Chip ID Detected WRT54GS V4

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[SOLVED] Unknown or NO CPU Chip ID Detected WRT54GS V4

pcfr33k

I just cannot figure out why I cannot get TUMPA to work for me.
There is nothing wrong with my router. I just want to see if TUMPA will work or not because I cannot seem to get TUMPA TTL mode to work with my seagate hard drive post. http://www.tiaowiki.com/forums/index.php/topic,4110.0.html. So I decided to test with my router. All connections double and triple checked. I have no idea what is going on here. I am on windows 7 32 bit, disabled AVAST for now just in case. Laptop with 3 USB 2.0 ports. I power up the TUMPA first then the router second then execute the command shown below.
c:\zjtag>zjtag -probeonly
==============================================
TUMPA EJTAG Debrick Utility V0.4
==============================================
Set I/O speed to 30000 KHz
USB TAP device has been initialized. Please confirm VREF signal connected!
Press any key to continue... ONCE target board is powered on!
Probing bus ... Done
Detected IR Length is 1
CPU Chip ID: 00000000000000000000000000000000 (00000000)
*** Unknown or NO CPU Chip ID Detected ***
*** Possible Causes:
1) Router/Modem is not Connected.
2) Router/Modem is not Powered On.
3) Improper JTAG Cable.
4) Unrecognized CPU Chip ID.
c:\zjtag>
Is there any other simple test I can run to make sure the TUMPA is working correctly. Access the internal CPU or some diagnostic I can run to make sure its working please.
Thanks

[deleted]

I don't know much about TUMPA hardware problems.
Please contact Mike in the forum or;

http://www.diygadget.com/diygadget-about-us wrote:We can be contacted via email at . However we recommend you to open support ticket at http://www.csbooth.com for fast, traceable response. We don't provide phone support at this moment.

[deleted]

pcfr33k wrote: I just cannot figure out why I cannot get TUMPA to work for me.

Please try decreasing the JTAG clock speed first:

zjtag -probeonly /L1:3

http://www.tiaowiki.com/w/Debrick_Wireless_Router_Using_TUMPA_and_zJTAG wrote:the most important flag is JTAG clock speed divider
/L1:<divider>
. TUMPA can clock TCK as high as 30Mhz, however most router's CPU cannot handle such high clock speed, thus you will have to slow down the clock to make it work.
This is the formula:
Speed in KHz = 30000 / (divider + 1)
For example, if you give the following option:
/L1:3
The TCK clock speed is 7500KHz or 7.5MHz (30000/(3+1)).

pcfr33k

Thank you very much it worked so now I know there is nothing wrong with the hardware/software/driver/compatibility and backup up my CFE with no issues.
Is there a zjtag application for MAC Os? I installed the FTDI driver in Mac OS but how can you jtag without a MAC application to do it or can this be done in a terminal with Linux commands?
Thanks

[deleted]

pcfr33k wrote: Thank you very much it worked so now I know there is nothing wrong with the hardware/software/driver/compatibility and backup up my CFE with no issues.
Is there a zjtag application for MAC Os? I installed the FTDI driver in Mac OS but how can you jtag without a MAC application to do it or can this be done in a terminal with Linux commands?
Thanks

You are always welcome. Maybe You could try OpenOCD or UrJTAG?
I currently don't have MAC OS installation for testing zJTAG. I don't plan to add support for MAC OS to zJTAG unless somebody donates for it to support the development.