SEGGER J-Link GDB Server V6.44c Command Line Version
JLinkARM.dll V6.44c (DLL compiled Mar 22 2019 17:26:40)
Command line: -port 2331 -s -device STM32F042F4 -endian little -speed 1000 -vd
-----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: off
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: STM32F042F4
Target interface: JTAG
Target interface speed: 1000kHz
Target endian: little
Connecting to J-Link...
J-Link is connected.
Firmware: J-Link ARM V8 compiled Nov 28 2014 13:44:46
Hardware: V8.00
Feature(s): RDI,FlashDL,FlashBP,JFlash,GDB
Checking target voltage...
Target voltage: 3.29 V
Listening on TCP/IP port 2331
Connecting to target...ERROR: STM32: Connecting to CPU via connect under reset failed.
ERROR: Could not connect to target.
Target connection failed. GDBServer will be closed...Restoring target state and closing J-Link connection...
Shutting down...
Could not connect to target.
Please check power, connection and settings.
"F042"-my testing project:| . Everything is right with Keil:o
