Problem Summary:
I cannot flash or debug any application on my LPC55S36-EVK board. The IDE cannot detect the on-board MCU-LINK debugger when attempting to launch a debug session.
Hardware:
Board: EVK-LPC55S36 (LPC55S36-EVK)
Debugger: MCU-LINK on-board (r0C3) CMSIS-DAP V3.167
Software Environment:IDE:
MCUXpresso IDE v25.6 [Build 136] [2025-06-27]
SDK: SDK_2.x_LPC55S36, version 25.09.00, manifest version 3.15.0
Project: hello_world example (imported from SDK)
OS: Windows
Problem Description:
I am unable to debug the hello_world example project on my LPC55S36-EVK board. When attempting to launch a debug session, I receive the following errors:
Initial error: "Target reported errors - 02: Failed on connect - Could not connect to core - 31: No connection to chip's debug port"
Debugging context: hello_hello_world_check LinkServer Release (1)
When checking SWD Configuration: "0 available SWD Devices detected. Connect a device and try again."
The SWD Configuration dialog shows an empty device list
What I've Checked:
USB cable is connected and the board appears powered (LEDs visible if any)
Windows Device Manager shows:
MCU-LINK on-board (r0C3) CMSIS-DAP V3.167 with "OK" status
Multiple MCU-Link VCom Ports with "Unknown" status
MCU-Link Trace & Power Data Port with "Unknown" status
Steps That Have NOT Resolved the Issue:
Rebooting the IDE
Recreating debug configuration
Changing USB ports
updated the link server and firmware update in isp mode.
Questions:
Should I reinstall LinkServer drivers? If so, what's the recommended procedure for MCUXpresso IDE v25.6?
Do the "Unknown" status devices in Device Manager indicate a driver conflict that needs resolution?
Are there known issues with MCUXpresso IDE v25.6 and LPC55S36 debug connectivity?
