I am facing issue while connecting JTAG with MPC8640 board.I am using WINDRIVER debug 8640D.
in the process "attemping JTAG communication " it display fail.
what might be the problem?
I found it can distinguish two core。
but it cannt be conmmunicate with the 2 core
Debug interface is a part of core, so if the core is disabled, debug interface is also inaccessible.
This is the most frequent reason for the core to not respond to debugger commands.
Have a great day,
Alexander
TIC
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you say ”This is the most frequent reason for the core to not respond to debugger command”
How can I prove this viewpoint.
power on sequence I have been check
No abnormality found
In addition to power supply, there are a lot of other things to check:
1. Reset configuration
2. Clock frequency and clock settings
3. etc