JanMatCodasip
commented
2 years ago Hi @fcuzzocrea, OpenOCD should be able to accomplish the connection to the target without reset.
AFAIK, OpenOCD does not trigger reset of the target unless you explicitly instruct it to do so.
Please double-check all your OpenOCD configuration files whether they contain reset [halt|run|init] command (which would reset the CPU target) or adapter assert|deassert [...] which may trigger SRST signal.
Check all your config files. Or run OpenOCD with higher verbosity (-d3 on command line) and take a look at what TCL commands are executed, whether reset or adapter assert is among them.
fcuzzocrea
TommyMurphyTM1234
abelixrev
I am not sure where asking this, but I am putting it here with the hope of getting some sort of guidance.
I am using the Microsemi polarfire soc, to be more accurate, I am using the Microchip Polarfire ICICLE Kit and the version of openocd which comes with the latest version of Softconsole.
Versions Microchip SoftConsole version is v2021.1-6.6.0.507, while openocd version is 0.10.0+dev-00859-g95a8cd9b5-dirty (2020-10-21-21:16)
Problem What I would like to do is to be able to attach to a running program without resetting the board in order to load an elf into the memory (L2LIM) and start executing it.
In the normal use case scenario what I do is this:
I have a very basic bootloader built using baremetal library which initializes the SoC
then I jump to an application stored in the form of an elf file into an attacched flash memory which gets copied into the lim by the bootloader and then executed, and this work
In the other debug use case scenario what I would like to do is this:
the same bootloader initializes the SoC, but instead of loading an application in ram and jumping to the exec point, sits into a while loop after the SoC has been initialized
with openocd I load the same elf directly into the lim trough GDB and the application starts executing
Sadly however, when openocd connects it resets the soc, so I lost the initialization done by the bootloader, and when the app start executing I end up trapped in here
By default the microsemi-riscv.cfg file is doing
proc do_board_reset_init {}what I have tried so far is to modify this file and instead of the aforementioned line I putted:
reset_config nonebut neither this worked.
The command I am using with gdb to load the elf are:
Is that behavior intended (so there is not way to attach openocd to a running program on the board without resetting the board itself) or am I doing something wrong?