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MSP430FR6043: 如何判断换能器断开故障?

Part Number: MSP430FR6043

我们现在用MSP430FR6043做燃气表开发。麻烦请教个问题,当不接超声波换能器时历程里的 USS_runAlgorithmsFixedPoint随机返回有效数据,但是实际上这个数据是不正常的,用官方开发板和自己的板子都一样,请问一下我们如何才能判断传感器断开的故障情况?