Black Magic Probe V2.3 - JTAG/SWD Debugger with GDB Server

Black Magic Probe is a plug and play JTAG/SWD microcontroller debugger with built in GDB server and UART, perfect for your ARM Cortex project.

The Black Magic Probe is a modern, in-application debugging tool for embedded microprocessors. It allows you see what is going on 'inside' an application running on an embedded microprocessor while it executes. It is able to control and examine the state of the target microprocessor using a JTAG or Serial Wire Debugging (SWD) port and on-chip debug logic provided by the microprocessor. The probe connects to a host computer using a standard USB interface. The user is able to control exactly what happens using the GNU source level debugging software, GDB.

You don't need to use OpenOCD or STLink. Black Magic Probe has built in GDB server which provides full debugging functionality, including: watchpoints, flash memory breakpoints, memory and register examination, flash memory programming, etc.

The probe supports the most used ARM Cortex-M based microcontrollers.

More information is available on the website of Adafruit and Black Magic.