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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 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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