Forums

JTAG and CCS

Started by mayongfeng00 August 1, 2003
Hi,everyone!
I am debugging a board with 4 DSPs that are in a JTAG loop. One of
the 4 DSPs is HOST which can access the other 3 slaves through the
HPI. But one of the slaves doesn't work well,ie, can't get into the
CCS if it is in the JTAG loop. Can anyone give me any hints?



If you have a TI emulator, open a DOS prompt in the ti/cc/bin directory and run the program xdsprobe.exe with the -i option.  Use 'xdsprobe -hv > xdsprobe.txt' to generate a brief manual on xdsprobe.  If you have another brand of emulator, let me know.  xdsprobe will verify the integrity of your scan chain - I am not sure if that is your problem.
 
Can the host download to the "problem DSP" successfully??  If so, you can download a few byte program consistinng of "branch to self + nops" and issue a DSPINT.  If you do this successfully, CCS should come up.
 
BTW, what are the types of the DSP??
 
mikedunn

mayongfeng00 <m...@bit.edu.cn> wrote:
Hi,everyone!
I am debugging a board with 4 DSPs that are in a JTAG loop. One of
the 4 DSPs is HOST which can access the other 3 slaves through the
HPI. But one of the slaves doesn't work well,ie, can't get into the
CCS if it is in the JTAG loop. Can anyone give me any hints?
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