How to debug the NUCLEO-L152RE using OpenOCD and GDB.

nucleo_debug.md

Window 1:

$ openocd -f nucleo-l152re.cfg # Starts the OpenOCD server.

You can find nucleo-l152re.cfg here.

Window 2:

$ telnet localhost 4444 # Connects to the OpenOCD server.
> reset halt # Performs as hard a reset as possible, and immediately halts the target.

Window 3:

$ arm-none-eabi-gdb
(gdb) target remote localhost:3333

Useful GDB Commands

Loads symbols from foo.elf:

(gdb) file foo.elf

Prints the name of a symbol which is stored at address <addr>:

(gdb) info symbol <addr>

Disassembles the next source line:

(gdb) set disassemble-next-line on

Prints the instruction to be executed next:

(gdb) x/i $pc

Examines memory at location <addr>:

(gdb) x/xw <addr>