microcontroller design of the digital frequency meter can be accurately measured frequency 1HZ- 15MHZ. apply for the square, triangle affected sine wave can be used in artificial spaces allocated switch in measurement cycle, frequency and duty cycle to convert between the frequency accuracy of a 9999, the cycle accuracy of 0.1 microsecond, duty cycle time accuracy of 0.1 microsecond.

频率计单片机
............\finall0~10mhz频率计周期占空比.ASM
............\占空比.ASM
............\数字频率计设计.doc

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