Embedded Systems Lab Practical PowerPoint presentation with source code

1. NAME: ABDUL SULEMAN
ROLL NO: 22081A1202
BRANCH: IT IIIRD
YEAR – IIND
SEMESTER
SUBJECT: E. S. LAB PRACTICAL PPT
PRESENTATION
PRESENTED TO: Mrs. SREE LATHA MAM (ECE)
COLLEGE: SHADAN COLLEGE OF ENGG. & TECH.

2.  Generate time delay using timers in a
microcontroller.
EMBEDDED SYSTEM LAB EXPERIMENT

3. AIM:
 To Generate A Specific Time Delay Using
Timers In A Microcontroller

4. Components:
 Microcontroller (e.g., Arduino, PIC, AVR,
etc.)
 Breadboard
 Jumper wires
 LEDs (optional, for visual indication)
 Resistors (as needed)
 Power supply

5. Microcontroller:
Resistors

6. Bread Board: LED:

7. Jumper-Wire:

8. Procedure:
Setup the Microcontroller:
o Connect the microcontroller to your computer
and open your development environment
(e.g., Arduino IDE).
Initialize the Timer:
o Configure the timer registers to set up the desired
time delay.
Start the Timer:
o Start the timer and let it count up to the specified
value.

9. Wait for the Interrupt:
oThe microcontroller will generate an
interrupt when the timer reaches the set
value.
Toggle an Output (Optional):
oUse the interrupt service routine (ISR) to
toggle an output pin (e.g., to blink an LED).

10. Code:
const int ledPin = 13; // LED
connected to digital pin 13 void
setup() {
pinMode(ledPin, OUTPUT);// Initialize the
digital pin as an output noInterrupts();//
Disable all interrupts
TCCR1A = 0;// Set entire
TCCR1A register to 0
TCCR1B = 0;// Same for
TCCR1B
TCNT1 = 0;// Initialize counter value to 0

11. OCR1A = 15624; // = 16MHz / (1024 * 1) - 1 (must be
<65536)
// Turn on
CTC mode
TCCR1B |= (1
<< WGM12);
// Set CS10 and CS12 bits
for 1024 prescaler
TCCR1B |= (1 << CS12) |
(1 << CS10);
// Enable timer
compare interrupt
TIMSK1 |= (1 <<
OCIE1A);

12. interrupts(); // Enable all interrupts
}
ISR(TIMER1_COMPA_vect) {
// Timer1 interrupt service routine
digitalWrite(ledPin,
digitalRead(ledPin) ^ 1); // Toggle
the LED
}
void loop() {
// Nothing to do here, the ISR will handle everything
}

13. OUTPUT:

14. Result:
 By configuring the timer and enabling interrupts,
the microcontroller successfully generated the
desired time delay, which was used to toggle an
LED

15. THANK YOU