Measuring motor speed, requires completion of timing T1 count counter, T0 completion time, and assuming the motor speed is less than//// 65536 r/min, in at least 120ms to 1 (single-chip crystal to 6M, the use of model 1 T1 value of the put///fcy in speed to the pulse output then feet in T1 (ie T1, as the work of the external clock, the initial value of T1 is set to 0//// in a certain period of time (120ms with T1 The total value will not be reversed) to read out the value of T1 will be able to calculate its speed)//

motor-check-speed.c

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