对一个电机转速的测量(即对脉冲的频率测量) ........................................\111.c ........................................\111.DSN ........................................\111.hex ........................................\111.PWI ........................................\222.c ........................................\222.DSN ........................................\222.hex ........................................\对一个电机转速的测量(即对脉冲的频率测量).c