Practical 1
Toggle Port LED
Write a program in Assembly/C programming language to
alternately ON/OFF LEDs connected to two different ports. Draw
appropriate circuit diagram to demonstrate the above problem.
Code:
#include #include
void
main(void){DDRA=0xff;PORTA=0xff;DDRB=0xff;PORTB=0x00;//Unmasking
the interrupt#asm("sei");while (1){ delay_ms(2000);
PORTA=PORTA^0xff;PORTB=PORTB^0xff; }}
Output:
Practical 2
Simulate Binary Counter at Port
Write a program in Assembly/C programming language to simulate
binary counter on LEDs. Draw appropriate circuit diagram to
demonstrate the above problem.
Code:
#include #include
//Global variable unsigned char led_status=0x01;
void main(void){DDRB=0xff;PORTB=led_status;//Unmasking the
interrupt#asm("sei");while (1){ PORTB=led_status;
if(led_status==0x80)led_status=0x01;else led_status
