$//$ Hardware: Two buttons with GPIO pullup resistors.

$//$ The LCD.

$//$

$//$

$//$ Problem Statement: Build an Arduino project that uses two buttons and the LCD. One button will

$//$ clear the LCD and re$-$initialize counter variable to zero. If button $==$ pushed, clear LCD $//$ and counter $=0.$

$//$ The second button will enter a while loop and increment the counter variable by one

$//$ and display value on LCD. While button $==$ pushed, counter $=$ counter $+1$ and write counter

$//$ value to display.

$//$ Note: $16-$bit integer range of $-32,768$ to $32,767.$ Then rolls over to zero.

$//$

$//****$ Pseudocode Algorithm $****$

$//$

$//$ create a global integer variable counter and initialize to zero

$//$

$//$ setup$()$

$//$

$//$ set pin $4$ as input for button one with a pullup resistor

$//$ set pin $5$ as input for button two with a pullup resistor

$//$ setup pins for LCD $$ use Lab$-4$ as your guide

$//$

$//$

$//$ loop$()$

$//$

$//$ if $($ button one pushed $)$

$//$

$//$ clear LCD $//$ command from Lab$-4$

$//$

$//$ counter $=0$

$//$

$//$

$//$ while$($ button two pushed $)$

$//$

$//$ counter $=$ counter $+1$

$//$

$//$ write counter value to LCD $//$ commands from Lab$-4$

$//$

$//$ end while loop

$//$

$//$

$//$ end loop

Question: What is smallest value you can get for count variable $$ shortest time pushed button two $?$

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Question: What is highest value you can get for count variable $$ longest time push button two $?$

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Question: Change program so the counter variable subtracts one, instead of adds one. What is smallest $($negative$)$ value you can get for count variable $$ longest time button two pushed $?$

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