MCU Flashing Debug

Overview

Use this skill to debug MCU programming failures safely. Separate connection, erase, program, verify, and reset problems before recommending mass erase, option byte changes, security unlock, or boot configuration changes.

When To Use

Use this skill when:

• Firmware cannot be downloaded or flashed to an MCU.
• The programmer reports connect, erase, program, verify, timeout, locked, protected, or target voltage errors.
• The user mentions ST-Link, J-Link, CMSIS-DAP, OpenOCD, pyOCD, STC-ISP, WCH-Link, Nu-Link, vendor programmers, boot pins, ISP, IAP, DFU, or UART bootloader.

Do not use this skill for application-level bugs after a confirmed successful program/verify/run cycle. For probe-specific debugging (OpenOCD scripts, J-Link config, adapter speed), use openocd-jlink-stlink-debug.

First Questions

Ask for: