System Workbench for STM32

Console under debugger should produce some output:

SEGGER J-Link GDB Server V6.20g Command Line Version

JLinkARM.dll V6.20g (DLL compiled Oct 20 2017 17:09:27)

Command line: -if swd -device STM32F407VG -endian little -speed 4000 -port 2331 -swoport 2332 -telnetport 2333 -vd -ir -localhostonly 1 -singlerun -strict -timeout 0 -nogui
---GDB Server start settings---
GDBInit file: none
GDB Server Listening port: 2331
SWO raw output listening port: 2332
Terminal I/O port: 2333
Accept remote connection: localhost only
Generate logfile: off
Verify download: on
Init regs on start: on
Silent mode: off
Single run mode: on
Target connection timeout: 0 ms
--J-Link related settings--
J-Link Host interface: USB
J-Link script: none
J-Link settings file: none
--Target related settings--
Target device: STM32F407VG
Target interface: SWD
Target interface speed: 4000kHz
Target endian: little

Connecting to J-Link...
J-Link is connected.
Firmware: J-Link STLink V2 compiled Jun 26 2017 10:34:41
Hardware: V1.00
S/N: ##########
Checking target voltage...
Target voltage: 3.30 V
Listening on TCP/IP port 2331
Connecting to target...Connected to target
Waiting for GDB connection...Connected to 127.0.0.1
Reading all registers
Read 4 bytes @ address 0x00000000 (Data = 0x20020000)
Read 2 bytes @ address 0x00000000 (Data = 0x0000)
Received monitor command: speed 1000
Target interface speed set to 1000 kHz
Received monitor command: clrbp
Received monitor command: reset
Resetting target
Received monitor command: halt
Halting target CPU...
...Target halted (PC = 0x0800070C)
Received monitor command: regs
R0 = 00000000, R1 = 00000000, R2 = 00000000, R3 = 00000000
R4 = 00000000, R5 = 00000000, R6 = 00000000, R7 = 00000000
R8 = 00000000, R9 = 00000000, R10= 00000000, R11= 00000000
R12= 00000000, R13= 20020000, MSP= 20020000, PSP= 00000000
R14(LR) = FFFFFFFF, R15(PC) = 0800070C
XPSR 01000000, APSR 00000000, EPSR 01000000, IPSR 00000000
CFBP 00000000, CONTROL 00, FAULTMASK 00, BASEPRI 00, PRIMASK 00
Reading all registers
Read 4 bytes @ address 0x0800070C (Data = 0xD034F8DF)
Read 2 bytes @ address 0x0800070C (Data = 0xF8DF)
Received monitor command: speed 4000
Target interface speed set to 4000 kHz
Received monitor command: flash breakpoints 1
Flash breakpoints enabled
Received monitor command: semihosting enable
Semi-hosting enabled (Handle on BKPT)
Received monitor command: semihosting IOClient 1
Semihosting I/O set to TELNET Client
Received monitor command: SWO DisableTarget 0xFFFFFFFF
SWO disabled successfully.
Received monitor command: SWO EnableTarget 0 0 0x1 0
SWO enabled successfully.
Read 4 bytes @ address 0x0800070C (Data = 0xD034F8DF)
Downloading 392 bytes @ address 0x08000000 - Verified OK
Downloading 1884 bytes @ address 0x08000190 - Verified OK
Downloading 8 bytes @ address 0x080008EC - Verified OK
Downloading 4 bytes @ address 0x080008F4 - Verified OK
Downloading 1068 bytes @ address 0x080008F8 - Verified OK
Read 4 bytes @ address 0x0800070C (Data = 0xD034F8DF)
Read 2 bytes @ address 0x0800067E (Data = 0x2300)
Read 2 bytes @ address 0x0800067E (Data = 0x2300)
Read 2 bytes @ address 0x0800067E (Data = 0x2300)
Read 2 bytes @ address 0x08000682 (Data = 0x687B)
Received monitor command: clrbp
Received monitor command: reset
Comparing flash .................... Done.
Verifying flash .................... Done.
Resetting target
Received monitor command: halt
Halting target CPU...
...Target halted (PC = 0x0800070C)
Read 2 bytes @ address 0x0800067E (Data = 0x2300)
Read 2 bytes @ address 0x0800067E (Data = 0x2300)
Read 2 bytes @ address 0x0800067E (Data = 0x2300)
Received monitor command: regs
R0 = 00000000, R1 = 00000000, R2 = 00000000, R3 = 00000000
R4 = 00000000, R5 = 00000000, R6 = 00000000, R7 = 00000000
R8 = 00000000, R9 = 00000000, R10= 00000000, R11= 00000000
R12= 00000000, R13= 20020000, MSP= 20020000, PSP= 00000000
R14(LR) = FFFFFFFF, R15(PC) = 0800070C
XPSR 01000000, APSR 00000000, EPSR 01000000, IPSR 00000000
CFBP 00000000, CONTROL 00, FAULTMASK 00, BASEPRI 00, PRIMASK 00
Reading all registers
Read 4 bytes @ address 0x0800070C (Data = 0xD034F8DF)
Setting breakpoint @ address 0x0800067E, Size = 2, BPHandle = 0x0001
Setting breakpoint @ address 0x08000682, Size = 2, BPHandle = 0x0002
Starting target CPU...
...Breakpoint reached @ address 0x0800067E
Reading all registers
Read 4 bytes @ address 0x0800067E (Data = 0x607B2300)
Removing breakpoint @ address 0x0800067E, Size = 2
Removing breakpoint @ address 0x08000682, Size = 2
Read 4 bytes @ address 0x08000742 (Data = 0x00004770)
Read 2 bytes @ address 0x08000730 (Data = 0x4B09)
Read 4 bytes @ address 0x08000758 (Data = 0x2000059C)
Read 2 bytes @ address 0x08000732 (Data = 0x429A)
Read 2 bytes @ address 0x08000734 (Data = 0xD3F9)
Read 4 bytes @ address 0x2001FFF4 (Data = 0x00000000)
Read 4 bytes @ address 0x2001FFF4 (Data = 0x00000000)