Hi,

the flyswatter.cfg says to report test with real interface here. I have
Flyswatter rev B connected to Stellaris Launchpad (ARM Cortex M4F) as a
test device (see output below).

It seems the processor is detected correctly (0x4ba00477), but
afterwards it fails with "invalid ACK" message.

Config used for target is here: http://pastie.org/9432092 (a bit
modified stellaris script from older openocd)

I tried searching for the meaning of the "invalid ACK" message, but
couldn't decipher what is wrong.


% openocd --file interface/ftdi/flyswatter.cfg --file target/stellaris.cfg
Open On-Chip Debugger 0.8.0 (2014-07-30-14:23)
Licensed under GNU GPL v2
For bug reports, read
        http://openocd.sourceforge.net/doc/doxygen/bugs.html
WARNING!
This file was not tested with real interface, it is based on schematics
and code
in ft2232.c. Please report your experience with this file to openocd-devel
mailing list, so it could be marked as working or fixed.
Info : only one transport option; autoselect 'jtag'
adapter speed: 500 kHz
Info : clock speed 500 kHz
Info : JTAG tap: lm3s.cpu tap/device found: 0x4ba00477 (mfg: 0x23b,
part: 0xba00, ver: 0x4)
Warn : Invalid ACK 0x6 in JTAG-DP transaction
Info : accepting 'gdb' connection from 3333
undefined debug reason 7 - target needs reset
Error: Target not examined yet
undefined debug reason 7 - target needs reset
Info : dropped 'gdb' connection


Ondrej

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