I have an Energy Micro EFM32 Gecko board in my hands at the moment that
provides a SWD debug interface (no JTAG). With some level of SWD support
now available in OpenOCD, I was a little curious how much effort it would
take to bridge this over to the EFM32 evaluator with its onboard jlink.
To that end I made some initial test modifications to the jlink driver code
and created an initial configuration file based on the LPC1768 as a starting
point. Needless to say I didn¹t get very far:
Jupiter:build garycarlson$ openocd -d3 -f jlink.cfg -f efm32.cfg
Open On-Chip Debugger 0.6.0-dev-00032-g8ff6097 (2011-08-15-22:48)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.berlios.de/doc/doxygen/bugs.html
User : 11 43 command.c:557 command_print(): debug_level: 3
Debug: 12 43 configuration.c:45 add_script_search_dir(): adding
/Users/garycarlson/.openocd
Debug: 13 43 configuration.c:45 add_script_search_dir(): adding
/usr/local/share/openocd/site
Debug: 14 43 configuration.c:45 add_script_search_dir(): adding
/usr/local/share/openocd/scripts
Debug: 15 43 configuration.c:87 find_file(): found jlink.cfg
Debug: 16 43 command.c:151 script_debug(): command - ocd_command ocd_command
type ocd_interface jlink
Debug: 17 43 command.c:151 script_debug(): command - interface ocd_interface
jlink
Debug: 19 43 command.c:364 register_command_handler(): registering
'ocd_jlink'...
Debug: 20 44 command.c:364 register_command_handler(): registering
'ocd_jlink'...
Debug: 21 44 command.c:364 register_command_handler(): registering
'ocd_jlink'...
Debug: 22 44 command.c:364 register_command_handler(): registering
'ocd_jlink'...
Debug: 23 44 command.c:364 register_command_handler(): registering
'ocd_jlink'...
Debug: 24 44 command.c:364 register_command_handler(): registering
'ocd_jlink'...
Debug: 25 44 command.c:364 register_command_handler(): registering
'ocd_jlink'...
Debug: 26 44 command.c:364 register_command_handler(): registering
'ocd_jlink'...
Debug: 27 44 command.c:364 register_command_handler(): registering
'ocd_jlink'...
Debug: 28 45 command.c:364 register_command_handler(): registering
'ocd_jlink'...
Debug: 29 45 command.c:364 register_command_handler(): registering
'ocd_jlink'...
Warn : 30 45 transport.c:127 allow_transports(): must select a transport.
Debug: 31 45 transport.c:129 allow_transports(): allow transport 'jtag'
Debug: 32 45 transport.c:129 allow_transports(): allow transport 'swd'
Debug: 33 45 configuration.c:87 find_file(): found efm32.cfg
Debug: 34 45 command.c:151 script_debug(): command - ocd_command ocd_command
type ocd_transport select swd
Debug: 35 45 command.c:151 script_debug(): command - ocd_transport
ocd_transport select swd
Error: 36 45 target.c:435 get_current_target(): BUG: current_target out
of bounds
This looks like the same problem reported earlier this year by Simon Qian:
http://comments.gmane.org/gmane.comp.debugging.openocd.devel/15548
It appears that select targets have successfully implemented SWD support,
but I couldn't find any mention how this problem was resolved for those
targets (if it was at all). I am starting to worry that what I was hoping
to be a little swamp to drain might actually be a much larger one instead.
Any thoughts or comments would be appreciated.
Gary
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