[U-Boot-Users] BDI2000 with pxa255
Hi,
I've connected bdi2000 to the host computer and successfully updated firmware and managed to telnet to the bdi. I also adapted cfg file for my platform (KK trizeps2). When I power up the target device I get this error: ... - TARGET: target will be restarted in 10 sec - TARGET: processing reset request - TARGET: BDI asserts RESET and TRST - TARGET: BDI removed TRST - TARGET: Bypass check: 0x000000001 => 0x00000000 - TARGET: JTAG exists check failed # TARGET: resetting target failed # JTAG: communication with target failed - TARGET: target will be restarted in 10 sec ...
Can somebody point me to the possible causes for this behaviour?
PS. Is it mandatory to supply ~RESET pin to BDI? Can I just keep it in reset with a jumper closed? Trizeps2 is lacking this pin on JTAG connector.
best regards, hk
Hi
Can somebody point me to the possible causes for this behaviour?
Reset line.
PS. Is it mandatory to supply ~RESET pin to BDI?
Yes. BDI2000 uses ~RESET to upload the debug handler into the mini IC. See figure 10-11 in the Intel Xscale Microarchitecture User's Manual.
Can I just keep it in reset with a jumper closed?
Well, if you can match the timing and probably you should have a pull-up on the ~RESET line of the JTAG connector to the BDI2000, but I doubt it.
Matej
Matej Kupljen wrote:
Hi
Can somebody point me to the possible causes for this behaviour?
Reset line.
PS. Is it mandatory to supply ~RESET pin to BDI?
Yes. BDI2000 uses ~RESET to upload the debug handler into the mini IC. See figure 10-11 in the Intel Xscale Microarchitecture User's Manual.
Ok, I've found the reset pin on PXA255 and wired it to correct pin on BDI2000, but still the same error appears :(. Should there be any other pullup/pulldown resistors on other JTAG lines besides reset or does BDI hava them 'built in'?
regards, hk
participants (2)
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Hinko Kocevar -
Matej Kupljen