Fun with Fixed Point Math
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0:09Recap and set the stage for the day

0:09Recap and set the stage for the day

0:09Recap and set the stage for the day

1:03Don the thinking cap

1:03Don the thinking cap

1:03Don the thinking cap

1:38Working through the cycles-per-second formula for measure_cpu_freq()

1:38Working through the cycles-per-second formula for measure_cpu_freq()

1:38Working through the cycles-per-second formula for measure_cpu_freq()

16:12Check our formula with the one in measure_cpu_freq()

16:12Check our formula with the one in measure_cpu_freq()

16:12Check our formula with the one in measure_cpu_freq()

18:46Reverse engineer the cycles-per-second formula

18:46Reverse engineer the cycles-per-second formula

18:46Reverse engineer the cycles-per-second formula

21:02Computing the decimal portion of a real number in fixed point mathematics

21:02Computing the decimal portion of a real number in fixed point mathematics

21:02Computing the decimal portion of a real number in fixed point mathematics

25:37Determine to work through an example on the whiteboard

25:37Determine to work through an example on the whiteboard

25:37Determine to work through an example on the whiteboard

27:06Plug some example values into our cycles-per-second formula

27:06Plug some example values into our cycles-per-second formula

27:06Plug some example values into our cycles-per-second formula

41:04Summarise how this fixed point calculation works

41:04Summarise how this fixed point calculation works

41:04Summarise how this fixed point calculation works

47:57Pose the question: How does n % m / m give the decimal part of the number?

47:57Pose the question: How does n % m / m give the decimal part of the number?

47:57Pose the question: How does n % m / m give the decimal part of the number?

50:22The relationship between a remainder and a decimal

50:22The relationship between a remainder and a decimal

50:22The relationship between a remainder and a decimal

53:56Read about reciprocal^{1}

53:56Read about reciprocal^{1}

53:56Read about reciprocal^{1}

57:41Is it true that n % m / m = 1 / m % m

57:41Is it true that n % m / m = 1 / m % m

57:41Is it true that n % m / m = 1 / m % m

1:01:21Determine to sleep on this to fully understand it

1:01:21Determine to sleep on this to fully understand it

1:01:21Determine to sleep on this to fully understand it