c$)$ Assuming a system clock of $16$MHz$.$ Consider the following program:

and Timer$1$ settings are as follows:

#include

#include

volatile uint$8\_$t tot$\_$overflow;

void timer$1\_$init$()$

$\{$ TCCR$1$B $|=(1<<$ CS$12)$;

TCNT$1=0$;

TIMSK$1|=(1<<$ TOIE$1)$;

sei$()$;

tot$\_$overflow $=0$;

$\}$

ISR$($TIMER$1\_$OVF$\_$vect$)$

$\{$ tot$\_$overflow$++$;

$\}$

int main$($void$)$

$\{$ DDRL $=0$x$01$;

timer$1\_$init$()$;

while$(1)$

$\{$ if$($tot$\_$overflow$>=28)$

$\{$if$($TCNT$1>=40,000$

$\{$PORTL$^=(1<$ i$))$ Explain the code and what happens to PORTL in the above program.

$[10$ marks$]$