I am trying to debug using Arduino IDE through STM32Duino for my STM32 Nucleo-144 F767ZI. The code is uploaded successfully, but upon pressing debug, I get this error.
Waiting for gdb server to start...[2025-09-10T16:17:04.732Z] SERVER CONSOLE DEBUG: onBackendConnect: gdb-server session connected. You can switch to "DEBUG CONSOLE" to see GDB interactions.
"C:\\Users\\User\\AppData\\Local\\Arduino15\\packages\\STMicroelectronics\\tools\\xpack-openocd\\0.12.0-6/bin/openocd" -c "gdb_port 50000" -c "tcl_port 50001" -c "telnet_port 50002" -s "c:\\Users\\User\\AppData\\Local\\Temp\\.arduinoIDE-unsaved2025810-9148-1hcu05t.jn7e\\Blink" -f "C:/Users/User/AppData/Local/Programs/Arduino IDE/resources/app/plugins/cortex-debug/extension/support/openocd-helpers.tcl" -f interface/stlink.cfg -f "C:\\Users\\User\\AppData\\Local\\Arduino15\\packages\\STMicroelectronics\\hardware\\stm32\\2.11.0/debugger/select_dapdirect.cfg" -f target/stm32f7x.cfg
xPack Open On-Chip Debugger 0.12.0+dev-01850-geb6f2745b-dirty (2025-02-07-10:08)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
DEPRECATED! use 'gdb port', not 'gdb_port'
DEPRECATED! use 'tcl port' not 'tcl_port'
DEPRECATED! use 'telnet port', not 'telnet_port'
CDRTOSConfigure
Info : Listening on port 50001 for tcl connections
Info : Listening on port 50002 for telnet connections
Info : STLINK V2J46M33 (API v2) VID:PID 0483:374B
Info : Target voltage: 3.246408
Info : Unable to match requested speed 2000 kHz, using 1800 kHz
Info : Unable to match requested speed 2000 kHz, using 1800 kHz
Info : clock speed 1800 kHz
Info : stlink_dap_op_connect(connect)
Info : SWD DPIDR 0x5ba02477
Info : [stm32f7x.cpu] Cortex-M7 r1p0 processor detected
Warn : [stm32f7x.cpu] Erratum 3092511: Cortex-M7 can halt in an incorrect address when breakpoint and exception occurs simultaneously
Info : [stm32f7x.cpu] The erratum 3092511 workaround will resume after an incorrect halt
Info : [stm32f7x.cpu] target has 8 breakpoints, 4 watchpoints
Info : [stm32f7x.cpu] Examination succeed
Info : [stm32f7x.cpu] starting gdb server on 50000
Info : Listening on port 50000 for gdb connections
Info : accepting 'gdb' connection on tcp/50000
Warn : [stm32f7x.cpu] target was in unknown state when halt was requested
Error: timed out while waiting for target halted
Error: [stm32f7x.cpu] Execution of event gdb-attach failed:
Info : device id = 0x10016451
Error: Failed to read memory at 0x00202442
Warn : STM32 flash size failed, probe inaccurate - assuming 2048k flash
Info : flash size = 2048 KiB
Error: Failed to read memory at 0x00002442
Error: auto_probe failed
Error: Connect failed. Consider setting up a gdb-attach event for the target to prepare target for GDB connect, or use 'gdb_memory_map disable'.
Error: attempted 'gdb' connection rejected
Error: [stm32f7x.cpu] Polling failed, trying to reexamine
[2025-09-10T16:17:08.456Z] SERVER CONSOLE DEBUG: onBackendConnect: gdb-server session closed
GDB server session ended. This terminal will be reused, waiting for next session to start...
