JTAG Failure Olimex_USB_OCD & LPC2378

[golson8436]

I am just starting to use the LPC2378 and ARM_USB_OCD  and I am getting these errors

Open On-Chip Debugger 0.6.1 (2012-10-07-10:34)
Licensed under GNU GPL v2
For bug reports, read
   http://openocd.sourceforge.net/doc/doxygen/bugs.html
debug_level: 2
init_targets
Info : only one transport option; autoselect 'jtag'
trst_and_srst separate srst_gates_jtag trst_push_pull srst_open_drain
adapter_nsrst_delay: 100
jtag_ntrst_delay: 100
adapter speed: 500 kHz
Info : clock speed 500 kHz
Error: JTAG scan chain interrogation failed: all ones
Error: Check JTAG interface, timings, target power, etc.
Error: Trying to use configured scan chain anyway...
Error: lpc2378.cpu: IR capture error; saw 0x0f not 0x01
Warn : Bypassing JTAG setup events due to errors
Info : Embedded ICE version 15
Error: unknown EmbeddedICE version (comms ctrl: 0xffffffff)
Info : lpc2378.cpu: hardware has 2 breakpoint/watchpoint units
Warn : ThumbEE -- incomplete support

I removed the ISP and RST jumpers from the board.  But did not help.

[JohnS]

It probably would be the same if the JTAG tool is unplugged - try it - which may be a clue.  Or if target is unpowered - also try it.

Next idea is to try newer oocd.

If no luck, report to oocd crew , such as on their list, but they'll want debug 3 not 2 plus the actual script(s) / command line you used.

Plan also to say the exact board you use, not just chip.

John