Conditions to enable the DAP interface
The V2C-DAPLink board provides a USB interface to the Cortex®-M3 design Serial Wire Debug (SWD) connections.
For the V2C-DAPLink board to work, the implementation in the Arty Artix 7 (A7) board must contain a Cortex-M3 processor supporting SWD with the Quad Serial Port Interface (QSPI) flash interfaces present. For more information on memory map configuration, see Chapter 4 Working with the Cortex®-M3 DesignStart™ example design.
The Cortex-M3 processor is an integral part to program QSPI using the Debug Access Port (DAP). To debug or program using the DAP, the processor must be in a valid state of execution. Corrupt software can cause the system to lock. If this happens, you might need to perform a recovery procedure. For more information, see Recovering the DAP connection.