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怎样用MSP430F149测量方波的频率(频率是变化的20KHZ~50KHZ)?求指导

Other Parts Discussed in Thread: MSP430F149

使用了TI的TSL235光电转换器,MSP430F149;其中光电转换器的输出频率是变化的(范围在20HZ~100KHZ),希望通过使用430来实现对频率的测量。(本人初接触,希望能讲解的详细些,提供个例程)。 谢谢-祝好!]