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EECS 461 Post Lab 2 - University of Michigan EECS 461

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EECS 461 Post Lab 2 Due 02/04/2020 1. 4000 encoder counts per revolution, consistent with prelab solution 2. We found the value to be a little more than 8 revolutions (approximately 8.16) Theoreti ... cal value: = 16.38 → Divide this by 2 as 0x8000 is the center position 4000 2 −1 16 ⇒ 8.19 revolutions 3. Clock delay: 3 × 10 seconds/edge −7 Let speed = R revs/seconds ⇒ time per rev = seconds 1 R 1 rev = 4000 transitions (or edges) ⇒ time per edge = seconds 1 4000R To process all edges, delay < time per edge ⇒ 3 × 10 < −7 1 4000R ⇒ R < 833.3 ⇒ max R = 833 revolutions/second 4. R = 833 rev/s # of revolutions for 16-bit register to overflow = 16.38 ⇒ slowest CPU rate = = 50.8 Hz 833 16.38 5. a. Resolution = degrees per edge ⇒ event will occur for angle of rotation = 0.09 degrees 360 4000 b. Rotation freq = R cycles/sec 1 cycle = 4000 events ⇒ sampling frequency fs = 4000 R samples/sec c. For correct sampling, fmin, sampling = 2R samples/sec fs = 4000 R >> 2R ⇒ Yes, Nyquist hypothesis [Show More]

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