SWD

Serial Wire Debug (SWD) is a lightweight debug protocol from ARM. The physical layer of SWD consists of following lines:

• Serial Wire Clock (SWCLK): A clock driver by the host.

• Serial Wire Input Output(SWDIO): A bidirectional data line for debugging.

• Serial Wire Output (SWO): A trace output line for Serial Wire Viewer (SWV).

Attention

This ST-Link V2 does not support SWV as there is no SWO pin. Use USB instead of SWV.

Contents:

• Debug using SWD
• Print using SWD