Question $1$:$$ Software implemented Input Capture

a$)$ Assume the TM$4$C$123$ does not have Input Capture hardware or Interrupts.$$ Write a C program to save TIMER$1$A$$s value$($i$.$e$.$ TIMER$1\_$TAR$\_$R$)$ when a positive edge event occurs on PortD, pin$4.$ Note$/$Hint: you may want to complete part c first.

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Assume:

$$ GPIO has already been configured properly for you

$$ The Timer has already been configured into Periodic Mode for you

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int main$($void$)$

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$$ unsigned int rising$\_$edge$\_$time;

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$//$ YOUR CODE HERE

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b$)$ Describe two disadvantages of your software$-$implemented input capture program has compared to using Input Capture hardware with Interrupts