Re: [OpenOCD-user] JTAG-lock-pick Tiny 2 and SWD

[Mike M. <mi...@ai...>]

Hi again,

actually this config file I hacked up seems to work OK with this command line:

sudo openocd -f interface/ftdi/jtag-lock-pick_tiny_2.cfg -f /tmp/stm32-swd-
mikem.cfg

But is this the right way to do it?


# stm32-swd-mikem.cfg
# Connect to stm32f1 and similar by swd over jtag-lock-pick tiny 2
# use with patched openocd:
# sudo src/openocd -f tcl/interface/ftdi/jtag-lock-pick_tiny_2.cfg -f 
/tmp/stm32-swd-mikem.cfg
# and arm-none-eabi-gdb -ex "target remote localhost:3333" /tmp/xyz/xyz.elf

transport select swd
adapter_khz 10
adapter_nsrst_delay 200

if { [info exists CHIPNAME] } {
   set  _CHIPNAME $CHIPNAME
} else {
   set  _CHIPNAME stm32
}

if { [info exists ENDIAN] } {
   set  _ENDIAN $ENDIAN
} else {
   set  _ENDIAN little
}
# Work-area is a space in RAM used for flash programming
# By default use 16kB
if { [info exists WORKAREASIZE] } {
   set  _WORKAREASIZE $WORKAREASIZE
} else {
   set  _WORKAREASIZE 0x4000
}

#jtag scan chain
if { [info exists CPUTAPID ] } {
   set _CPUTAPID $CPUTAPID
} else {
  # See STM Document RM0008
  # Section 26.6.3
   set _CPUTAPID 0x3ba00477
}

swd newdap $_CHIPNAME cpu -irlen 4 -expected-id $_CPUTAPID
set _TARGETNAME $_CHIPNAME.cpu

target create $_TARGETNAME cortex_m3 -endian $_ENDIAN -chain-position 
$_TARGETNAME
$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size 
$_WORKAREASIZE -work-area-backup 0

# flash size will be probed
set _FLASHNAME $_CHIPNAME.flash
flash bank $_FLASHNAME stm32f1x 0x08000000 0 0 0 $_TARGETNAME

# if srst is not fitted use SYSRESETREQ to
# perform a soft reset
cortex_m reset_config sysresetreq

On Tuesday, June 17, 2014 09:17:23 PM Mike McCauley wrote:
> Hi Freddie,
> 
> thats all worked fine so far. Thanks. Just for the complete record for other
> people the commands are:
> 
> git clone git://git.code.sf.net/p/openocd/code openocd-code
> cd openocd-code/
> git fetch http://openocd.zylin.com/openocd refs/changes/36/2136/2
> git checkout FETCH_HEAD
> ./bootstrap
> ./configure --enable-ftdi
> make
> 
> 
> Now, whats  the right openocd command line to connect by SWD to an STM32F1
> or similar?
> 
> I see your tcl/interface/ftdi/jtag-lock-pick_tiny_2.cfg, but that doesnt set
> the transport etc up.
> 
> 
> Cheers.
> 
> On Tuesday, June 17, 2014 11:54:49 AM Freddie Chopin wrote:
> > W dniu 2014-06-17 10:12, Mike McCauley pisze:
> > > On Tuesday, June 17, 2014 08:52:17 AM Freddie Chopin wrote:
> > >> W dniu 2014-06-17 08:06, Mike McCauley pisze:
> > >>> Hi,
> > >>> Has anyone successfully used openocd with a JTAG-lock-pick Tiny 2 with
> > >>> SWD
> > >>> with, for example, a STM32F1?
> > >> 
> > >> There are a couple of success reports, but I guess you should be
> > >> looking
> > >> for them on the "devel" list, not here.
> > > 
> > > I did search and didnt find anything helpful except your patch reports.
> >  
> >  From what I remember Jens Bauer was trying the SWD patches.
> >  
> > >>> If so, how did you build and configure openocd for that?
> > >> 
> > >> For now (until this is fully merged) you need to compile OpenOCD with
> > >> this patch series - http://openocd.zylin.com/#/c/2136/2
> > > 
> > > Thanks.
> > > Your changes are in patch set 2, is that correct.
> > > Its not clear to me how to get the patched version from git. Can you
> > > please
> > > advise the process?
> > 
> > 1. Go to http://openocd.zylin.com/#/c/2136/2
> > 2. In the upper right click on "download"
> > 3. Click on the "copy to clipboard" button next to "checkout" -
> > currently "git fetch http://openocd.zylin.com/openocd
> > refs/changes/36/2136/2 && git checkout FETCH_HEAD"
> > 4. Execute this command in a git clone of OpenOCD.
> > 
> > This should pull the whole series, up to the point which is selected in
> > the "Related changes" window.
> > 
> > > Also, what is the ./configure command for building? ie what --enable
> > > options should I use for this device? Looks like maybe its
> > > --enable-ftdi??
> > 
> > Exactly - --enable-ftdi is the only one that is needed here, but others
> > will do no harm.
> > 
> > Regards,
> > FCh
> > 
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-- 
Mike McCauley           VK4AMM                   mi...@ai...
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