stlink接口定义

ST-Link是一种用于在开发过程中连接目标板并进行调试的接口。在使用ST-Link时，通常需要连接四根线，包括SWIO、SWCLK、3V3和GND。其中，SWIO和SWCLK分别用于进行串行线调试（SWD），3V3为电源供给线，GND为接地线。这些线的连接方式可以通过改变仿真器参数为SW来在Keil5的调试界面中进行配置。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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