D
Didi
- Jan 1, 1970
- 0
Hi everyone,
I am setting up my tools for an MPC5200 based device I have
designed. I have been using these tools (which like all development
software here, are my doing) on the MPC8240, on the MC68340,
and some others (TI, Xilinx parts) but now the 5200 seems to be
more stubborn than they usually are.
The problem I am stuck with since yesterday is the fact that
I cannot preload the boundary scan register (BSR) with a value. I can
read
it allright and I do read the actual states of the signals, but the
data
I shift into the 5200 BSR does not appear to influence the BSR at all,
next read I get the same value I had prior to the preload, with
perhaps some input value changed (I have a few floating).
I can also read the ID code allright, and the device responds to
its high-Z command prior to the first BSR shift I do; after that,
power cycling is the only way back to highz, although reading
the inputs still works.
I have the bsdl file and the 5200 UM files; so far I have no clue
what I am doing wrongly. It may be just that it's been a while
since I last messed with my JTAG software (not very likely,
I am already pretty much in it again, and it is not huge).
Anyone with any knowledge on that?
Thanks,
Dimiter
I am setting up my tools for an MPC5200 based device I have
designed. I have been using these tools (which like all development
software here, are my doing) on the MPC8240, on the MC68340,
and some others (TI, Xilinx parts) but now the 5200 seems to be
more stubborn than they usually are.
The problem I am stuck with since yesterday is the fact that
I cannot preload the boundary scan register (BSR) with a value. I can
read
it allright and I do read the actual states of the signals, but the
data
I shift into the 5200 BSR does not appear to influence the BSR at all,
next read I get the same value I had prior to the preload, with
perhaps some input value changed (I have a few floating).
I can also read the ID code allright, and the device responds to
its high-Z command prior to the first BSR shift I do; after that,
power cycling is the only way back to highz, although reading
the inputs still works.
I have the bsdl file and the 5200 UM files; so far I have no clue
what I am doing wrongly. It may be just that it's been a while
since I last messed with my JTAG software (not very likely,
I am already pretty much in it again, and it is not huge).
Anyone with any knowledge on that?
Thanks,
Dimiter