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做pwm实验，观察输出波形，比如观察输出的pwm1（GPIOA0)的波形，怎么把示波器接到开发板上？示波器的地线和信号线分别接哪里？
你是什么开发板，只要接到对应引脚和2812的GND就可以
示波器的探头接到PWM输出引脚上 另一端接到板子的地上
