Your repository must have the following files and no other! You will lose $5$ points for each extra file in the repository.

A text file README $($or README.md$)$ that lists partners' names, UD email addresses, and Student ID #s$.$ You may receive no credit if this file is not present!

$(20$ points$)$ a Bash script clock.sh that once$/$second will print the time in the $24-$hour clock format HH:MM:SS$.$ See "man date" for a command to produce this format of time. See "Basic shell scripts" for enough background to put this together.

$(60$ points$)$ The following files will be used to build a program called clock that continuously reads lines from stdin and displays them as described above on the LED array. Lines will be of the form HH:MM:SS; HH will range from $0-23,$ MM and SS will range from $0-59,$ and the separating :: are mandatory. Do not include clock in your repository, only these files:

$(30$ points$)$ display.c : Should have at least the following functions $($other helper functions may be added as desired$)$:

int open$\_$display$($void$)$ : This function should be called only once when the program starts up$.$ Create a suitable environment to draw the clock as described below. It should return $0$ if something went wrong in opening the display or if a display has already been opened $($and not closed$),1$ if successful. Be sure to check the return from getFrameBuffer$().$

Note: while global variables are frequently a bad idea, in C$,$ variables declared in a file outside a function are "global" only to that file. Using one for your pi$\_$framebuffer is a good idea.

void display$\_$time$($int hours, int minutes, int seconds$)$ : displays the time on the opened device using the below helpers.

void display$\_$colons$($void$)$ : draws the colons

void display$\_$hours$($int hours$)$ : displays the hours

void display$\_$minutes$($int minutes$)$ : displays the minutes

void display$\_$seconds$($int seconds$)$ : displays the seconds

void close$\_$display$($void$)$ : This function should only be called once when the program is ending to take care of shutting down the display.

$(5$ points$)$ display.h : prototypes for all above functions for use in main.c below.

$(25$ points$)$ main.c : contains main function, which $($either by itself, or using a helper$)$ continuously reads lines from stdin and displays them using display$\_$time as described above. When the program reads fewer than three values, it should clear the display and exit. Don't forget that scanf can read patterns! Note: when stdin is coming from other than the terminal $($like from the clock.sh script$),$ you'll need to use $^$C $($control$-$C$)$ to exit the program.

$(20$ points$)$ a Makefile with $($at least$)$ the following rules

Rules to compile $.$c files into $.$o files $($display$.$o and main.o$)$

An all rule that will combine all $.$o files into an executable clockdisplay

A clean rule that will remove the executable clockdisplay and all $.$o files

A run rule that will run the script and pipe the output into the clockdisplay binary. Note: you'll need to hit control$-$C to make this stop. The screen may not clear, and you will get an error message message from make. That's okay.