Hello,
after getting a brand new "Atmel-ICE", I wanted to give it a try with
the CMSIS-DAP OpenOCD branch.
I had to apply a couple of minor patches in order to work with it (see
Trac bugs #67 and #68), but can now operate it.
However, I'm stumbling in getting the configuration entries to work
with a SAM3 device.
Using a Segger J-Link on an Atmel SAM3S-EK works using these entries:
-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----
adapter_khz 500
source [find interface/jlink.cfg]
source [find board/atmel_sam3s_ek.cfg]
-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----
If I now replace the interface entry by the CMSIS-DAP one:
-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----
adapter_khz 500
source [find interface/cmsis-dap.cfg]
source [find board/atmel_sam3s_ek.cfg]
-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----
it fails with:
-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----
Open On-Chip Debugger 0.8.0-dev-00381-gf91390f-dirty (2014-03-10-14:41)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.sourceforge.net/doc/doxygen/bugs.html
adapter speed: 500 kHz
Info : only one transport option; autoselect 'cmsis-dap'
Info : CMSIS-DAP: SWD Supported
Info : CMSIS-DAP: JTAG Supported
Info : CMSIS-DAP: Interface Initialised (SWD)
adapter speed: 500 kHz
adapter_nsrst_delay: 100
Runtime Error: /usr/local/share/openocd/scripts/target/at91sam3XXX.cfg:49:
invalid command name "jtag_ntrst_delay"
in procedure 'script'
at file "embedded:startup.tcl", line 58
at file "openocd.cfg", line 22
at file "/usr/local/share/openocd/scripts/board/atmel_sam3s_ek.cfg", line 1
at file "/usr/local/share/openocd/scripts/target/at91sam3sXX.cfg", line 13
at file "/usr/local/share/openocd/scripts/target/at91sam3XXX.cfg", line 49
Info : CMSIS-DAP: FW Version = 01.00.0021
Info : SWCLK/TCK = 1 SWDIO/TMS = 1 TDI = 1 TDO = 0 nTRST = 0 nRESET = 1
Info : DAP_SWJ Sequence (reset: 50+ '1' followed by 0)
Info : CMSIS-DAP: Interface ready
Info : clock speed 500 kHz
Error: BUG: current_target out of bounds
-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----
Running it in GDB tells me that there is apparently no "target" set,
but why is that required at this point?
However, if I pretend I were using a SAM4S-EK instead:
-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----
adapter_khz 500
source [find interface/cmsis-dap.cfg]
source [find board/atmel_sam4s_ek.cfg]
-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----
it at least pretends to work, too (the IDCODE is wrong though, Segger
tells it must be 0x4ba00477):
-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----
Open On-Chip Debugger 0.8.0-dev-00381-gf91390f-dirty (2014-03-10-14:41)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.sourceforge.net/doc/doxygen/bugs.html
adapter speed: 500 kHz
Info : only one transport option; autoselect 'cmsis-dap'
Info : CMSIS-DAP: SWD Supported
Info : CMSIS-DAP: JTAG Supported
Info : CMSIS-DAP: Interface Initialised (SWD)
adapter speed: 500 kHz
adapter_nsrst_delay: 100
cortex_m reset_config sysresetreq
Info : CMSIS-DAP: FW Version = 01.00.0021
Info : SWCLK/TCK = 1 SWDIO/TMS = 1 TDI = 1 TDO = 0 nTRST = 0 nRESET = 1
Info : DAP_SWJ Sequence (reset: 50+ '1' followed by 0)
Info : CMSIS-DAP: Interface ready
Info : clock speed 500 kHz
Info : IDCODE 0x2ba01477
Info : sam4.cpu: hardware has 6 breakpoints, 4 watchpoints
-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----
Hmm, so what's the difference? Both, SAM3 and SAM4 should be similar
enough, both support JTAG as well as SWD, so I think I should be able
to use the CMSIS-DAP debugger for them.
Comparing the board description files, I eventually get to the
following differences in the SAM3/4 target description files:
+source [find target/swj-dp.tcl]
-jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id
$_CPUTAPID
+swj_newdap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id
$_CPUTAPID
Any clues are welcome.
--
cheers, Joerg .-.-. --... ...-- -.. . DL8DTL
http://www.sax.de/~joerg/
Never trust an operating system you don't have sources for. ;-)
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