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# fe(2) - Name Real Time Computing Systems EE 4770 Final...

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Unformatted text preview: Name Real Time Computing Systems EE 4770 Final Examination 7 May 1997, 7:30-9:30 CDT Alias Problem 1 (25 pts) Problem 2 (25 pts) Problem 3 (25 pts) Problem 4 (25 pts) Exam Total (100 pts) Good Luck! Problem 1: Design a circuit to convert process variable x ∈ [10 W sr , 20 W sr ], the radiant intensity of a light source, to H ( x ) = x/ W sr , a floating-point number to be written into variable rad int . The precision should be ± 1 mW sr . Use a photodiode with response H t ( E ) = 2 . 12 E μ A cm 2 mW mounted 718mm from the light source. Make full use of the ADC dynamic range. The light source radiates uniformly in all directions. Draw a schematic of the circuit, indicating all component and source values. Show the interface routine. (25 pts) 2 Problem 2: Events and their interrupts and handlers in a real time system are described in the partially filled table below. Item “1 Time” in the table indicates that the respective event will occur just once, “3 Times” indicates that the event will occur three times. Complete the table. Tooccur just once, “3 Times” indicates that the event will occur three times....
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fe(2) - Name Real Time Computing Systems EE 4770 Final...

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