Systems Engineering

CSE$401$

Monday, $02$ December, $2024$

Q$\mathrm{.}1.$ Use a state diagram to describe the high$-$level operation of the ChipMunk Recorder $($CMR$).$ The CMR records sounds and then plays them back at a variety of speeds, making a recorded voice sound like a high$-$pitched chipmunk. The CMR receives input from a keyboard and an audio source. The behavior of the system is described as follows:

When powered up$,$ the CMR enters a wait state

$[7]$

If R is pressed, the recorder begins recording

Any keypress will put the CMR back into wait state

If S is pressed, the CMR is ready to change playback speed. In this state, if any key between $1$ and $5$ is pressed the playback speed will be changed to that value.

Pressing R in adjust playback speed mode will cause CMR to go to wait state

Pressing P key will cause CMR to play back the recorded sounds.