these are the other files

timer.c

#include "timer.h$"$

void timer$\_$init$($void$)\{$

$//$Your timer setup code here

$$TCA$0.$SINGLE.CTRLA $=$TCA$\_$SINGLE$\_$CLKSEL$\_$DIV$1024\_$gc $|$TCA$\_$SINGLE$\_$ENABLE$\_$bm;

$$TCA$0.$SINGLE.PERBUF $=0$;

$$TCA$0.$SINGLE.CMP$0$BUF $=0$;

$\}$

timer.h

#ifndef TIMERH

#define TIMERH

#include

void timer$\_$init$($void$)$;

#endif $/*$TIMER$\_$H $*/$

spi.c

#include "spi.h$"$

void spi$\_$init$($void$)\{$

$$PORTC$.$DIRSET $=$PIN$4\_$bm $|$PIN$5\_$bm $|$PIN$7\_$bm;

$$SPI$0.$CTRLA $=$SPI$\_$ENABLE$\_$bm $|$SPI$\_$MASTER$\_$bm $|$SPI$\_$MODE$\_0\_$gc $|$SPI$\_$PRESC$\_$DIV$4\_$gc;

$$SPI$0.$CTRLB $=0$;

$$SPI$0.$INTCTRL $=0$;

$\}$

void spi$\_$transfer$($uint$8\_$t data$)\{$

$$SPI$0.$DATA $=$data;

$$while $(!($SPI$0.$INTFLAGS & SPI$\_$IF$\_$bm$))$;

$\}$

spi.h

#ifndef SPIH

#define SPIH

#include

void spi$\_$init$($void$)$;

void spi$\_$transfer$($uint$8\_$t data$)$;

#endif $/*$SPI$\_$H $*/$

buzzer.c

#include "buzzer.h$"$

void buzzer$\_$init$($void$)\{$

$$PORTA$.$DIRSET $=$PIN$1\_$bm;

$$TCA$0.$SINGLE.CTRLB $=$TCA$\_$SINGLE$\_$WGMODE$\_$SINGLESLOPE$\_$gc $|$TCA$\_$SINGLE$\_$CMP$0$EN$\_$bm;

$$TCA$0.$SINGLE.CTRLA $=$TCA$\_$SINGLE$\_$CLKSEL$\_$DIV$4\_$gc;

$$TCA$0.$SINGLE.PERBUF $=0$;

$$TCA$0.$SINGLE.CMP$0$BUF $=0$;

$\}$

void buzzer$\_$play$($uint$16\_$t frequency$)\{$

$$uint$16\_$t compareValue $=$F$\_$CPU $/(2*4*$frequency$)$;

$$TCA$0.$SINGLE.PERBUF $=$compareValue;

$$TCA$0.$SINGLE.CMP$0$BUF $=$compareValue $/2$;

$\}$

void buzzer$\_$stop$($void$)\{$

$$TCA$0.$SINGLE.PERBUF $=0$;

$$TCA$0.$SINGLE.CMP$0$BUF $=0$;

$\}$

and buzzer.h

#ifndef BUZZER$\_$H

#define BUZZER$\_$H

#include

#define TONE$1\_$FREQ $1046//$E$($high$)$

#define TONE$2\_$FREQ $554//$C$$

#define TONE$3\_$FREQ $440//$A

#define TONE$4\_$FREQ $330//$E$($low$)$

void buzzer$\_$init$($void$)$;

void buzzer$\_$play$($uint$16\_$t frequency$)$;

void buzzer$\_$stop$($void$)$;

#endif $/*$BUZZER$\_$H $*$

main.c

void generateSimonSequence$($void$)$;

void playSequence$($void$)$;

void getUserInput$($void$)$;

void displaySuccess$($void$)$;

void displayFail$($void$)$;

void increaseSequenceLength$($void$)$;

void resetGame$($void$)$;

void update$\_$score$($void$)$;

void displayHighScores$($void$)$;

int main$($void$)\{$

$//$ Initialize peripherals

$$ timer$\_$init$()$;

$$ spi$\_$init$()$;

$$ buzzer$\_$init$()$;

$$ buzzer$\_$stop$()$;

$$ state$\_$t state $=$ WAIT;

$$ while $(1)\{$

$$ switch $($state$)\{$

$$ case WAIT:

$$ resetGame$()$;

$$ generateSimonSequence$()$;

$$ state $=$ PLAY$\_$SIMON;

$$ break;

$$ case PLAY$\_$SIMON:

$$ playSequence$()$;

$$ state $=$ USER$\_$INPUT;

$$ break;

$$ case USER$\_$INPUT:

$$ getUserInput$()$;

$$ state $=$ CHECK$\_$INPUT;

$$ break;

$$ case CHECK$\_$INPUT:

$$ if $($currentStep $==$ sequenceLength$)\{$

$$ displaySuccess$()$;

$$ increaseSequenceLength$()$;

$$ state $=$ PLAY$\_$SIMON;

$\}$ else $\{$

$$ displayFail$()$;

$$ resetGame$()$;

$$ state $=$ WAIT;

$\}$

$$ break;

$\}$

$\}$

$\}$

void generateSimonSequence$($void$)\{$

$$ for $($uint$16\_$t i $=0$; i $<100$; i$++)\{$

$$ uint$8\_$t BIT $=$ STATE$\_$LFSR & $1$;

$$ STATE$\_$LFSR $>>=1$;

$$ if $($BIT$)\{$

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