Lab$5|$

Task $1$: Introduction to Timers with LED Blinking

$1.$ Objective: Demonstrate using Timer$1$ to create a precise $1-$second blink interval for an LED without using the delav$()$ function.

$2.$ Instructions:

$-$ Configure Timerl in CTC $($Clear Timer on Compare Match$)$ mode.

$-$ Set up an interrupt to toggle an LED every second.

$-$ Verify that the LED blinks with consistent timing by observing the LED behavior.

$3.$ Type in and debug $($if necessary:

$```$

const int ledPin $=13$; $//$ LED on pin $13$

void setup$()\{$

pinMode$($ledPin$,$ OUTPUT$)$;

$//$ Configure Timer$1$ for $1-$second intervals

TCCR$1$A $=0$; $//$ Normal mode

TCCR$1$B $=(1$ WGM$12)|(1$ CS$12)|(1$ CS$10)$; $//$ CTC mode,

prescaler $1024$

OCR$1$A $=15624$; $//$ Compare match for $1$ Hz $(1$ second$)$

TIMSK$1=(1$ OCIE$1$A$)$; $//$ Enable Timer$1$ compare interrupt

sei$()$; $//$ Enable global interrupts

$\}$

ISR$($TIMER$1\_$COMPA$\_$vect$)\{$

digitalWrite$($ledPin$,!$digitalRead$($ledPin$))$; $//$ Toggle LED

$\}$

void loop$()\{$

$//$ No code needed here; LED is controlled by the timer interrupt

$\}$

$```$