OpenOCD / JTAG Debugging

Purpose

Guide agents through configuring OpenOCD for JTAG and SWD targets, flashing firmware to microcontrollers, attaching GDB for bare-metal debugging, setting hardware watchpoints, and configuring J-Link and CMSIS-DAP adapters.

Triggers

• "How do I connect GDB to my MCU with OpenOCD?"
• "How do I flash firmware using OpenOCD?"
• "How do I set up J-Link with OpenOCD?"
• "What's the difference between JTAG and SWD?"
• "How do I set a hardware watchpoint in GDB?"
• "OpenOCD says 'Error: unable to find JTAG device' — how do I fix it?"

Workflow

1. JTAG vs SWD