sedg
I recently purchased a TUMPA V2 and any time I try to use zjtag I am getting:
Detected IR chain Length is 0
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.
I have been connecting multiple WRT54G routers to the tumpa device (and a Netgear WGU624) and zjtag always comes back with the message above. Even when I add the clock divider at values of 1 through 20, I cannot get the TUMPA to recognize the devices. I can use the TUMPA as a USB to Serial-TTL and have had it work but the JTAG portion does not seem to work for me. I imagine I am missing something rather simple but I cannot determine what it is. Does anyone have any advice on how I can troubleshoot the use of the TUMPA V2? Thank you for any suggestions you may have.