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** [tickets:#168] examine-end event handler unable to access memory with two
targets**
**Status:** new
**Milestone:** 0.9.0
**Created:** Fri Nov 17, 2017 07:19 AM UTC by Christopher Head
**Last Updated:** Fri Nov 17, 2017 07:19 AM UTC
**Owner:** nobody
I have a board with an STM32F7 on it. My target script sources the shipped
stm32f7x.cfg target script. Everything works perfectly. No problems.
I have another board with two STM32F7s on it. The JTAG chain runs through both
chips. My target script sources the shipped stm32f7x.cfg target script twice,
setting CHIPNAME before each sourcing. Everything works *mostly* fine, except
that when I start OpenOCD, I see this output in the mix:
Error: Target not examined yet
Error: mem2array: Read @ 0xe0042004, w=4, cnt=1, failed
/usr/bin/../share/openocd/scripts/mem_helper.tcl:6: Error:
in procedure 'init'
in procedure 'ocd_bouncer'
in procedure 'mmw'
in procedure 'mrw' called at file
"/usr/bin/../share/openocd/scripts/mem_helper.tcl", line 25 at file
"/usr/bin/../share/openocd/scripts/mem_helper.tcl", line 6
I have tracked down the reason. The helper script is trying to set some bits in
DBGMCU to prevent the CPU from going to sleep; it does this in the
“examine-end” event handler. Poking around, I see that those bits are set
properly on the second CPU in the chain but not the first. I assume the error
messages are therefore from the first CPU’s examine-end handler.
Attached, anonymized, find my config file. I’m using OpenOCD 0.10.0.
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