I want to read the content of specific RAM addresses from a microcontroller application via a ST-Link via SWD. For now I do this with command line, but later I want to build a data logger with this.
So first I setup the connection to the target with following command which is working:
openocd -f interface/stlink.cfg -c "transport select hla_swd" -f target/stm32g4x.cfg
The from a new command window I start gdb and connect to the server:
gdb-multiarch
target extended-remote localhost:3333
Then I can successfully read a variable content from a memory address with
p/x *0x20003C48
The problem I have is that as soon as I connect to the target with "target extended-remote" the program execution on the microcontroller stops and I can only read while the controller is in stop.
I found the chapter "20.5 Using GDB as a non-intrusive memory inspector" here. What I understood from this that I have to add the following two lines in stm32g4x.cfg:
$_TARGETNAME configure -event gdb-attach {}
gdb_memory_map disable
and executing following two command before connecting to the target (target extended-remote):
set remote interrupt-on-connect off
set mem inaccessible-by-default off
But the problem is the target is still halted.
OpenOCD server output:
Info : accepting 'gdb' connection on tcp/3333
target halted due to debug-request, current mode: Thread
xPSR: 0x21000000 pc: 0x080025be msp: 0x20003a58
Any advise how to connect without halt (attach)?
Thank you in advance!
