Description: ATMEGA8 MCU frequency meter program. Principle produced by 32.768K asynchronous external crystal clock signal, as the M8 2de clock timer, set 1024de prescaler, can get accurate time TCNT2 overflow de 1s, in the overflow interrupt control 74ls00 then control the NAND gate measured signal de-off, the cumulative gain de 1s in the counter value is obtained after a simple de op de frequency of the signal
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pinlvchengxu.txt