Does STLINK have an SWD interface
The ST-LINK is an in-circuit debugger and programmer for the STM8 and STM32 microcontroller families. The first version of the protocol (v1) only allows a point-to-point communication through a two-wire connection between the host and the device to debug. Usually you can use the 3Volt or 5V leads but you may have to power your board from USB. SWCLK：Serial Wire Clock, serial line clock pin, as the clock signal line of the simulation signal, it is recommended to pull down; SWO: Serial data output pin,CPUThe debugging interface can be passedSWOThe pin outputs some debugging information.
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