Homework Sourseplease help meSolutioninclude header to enable data flow con
please help me
Solution
#include <avr/io.h> //header to enable data flow control over pins
#define F_CPU 1000000 //telling controller crystal frequency attached
#include <util/delay.h> //header to enable delay function in program
int main(void)
{
DDRB = 0x00; // Taking portB as input port
DDRA = 0xFF; //taking porta as output port
DDRD = 0b11111111; //taking portd as output
int DISPLAY1 [10] = {0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x67};
//character display values from 0-9
int c = 0;
int i=0;
int d = 0;
int one = 0; //memory for storing ones place value
int ten =0; //memory for storing tens place value
while(1)
{
if (bit_is_clear(PINB,0)) //when button one is pressed
{
if (i<21)
{
i++; //increment integer ‘i’ by one if its less than 21
}
}
if (bit_is_clear(PINB,1)) // when button 2 is pressed
{
if (d<21)
{
d++; // increment integer ‘d’ by one if its less than 21
}
}
if (i>20) //if ‘i’ was executed more than 21 times
{
if (c<99) //if counter value less than 99
{
c++; //increment counter value
}
i=0; //put i to zero
}
if (d>20) // if ‘d’ was executed more than 21 times
{
if (c>0) //if counter value is greater than 0
{
c--; //decrease the value by one
}
d=0; //put d to zero
}
if (c<10) // if counter value is less than 10
{
one = c; // ones place is equal to counter value or c
ten = 0; // tens place is equal to zero as ‘c’ value is less than 10
}
if (c>=10) //if count value is greater than or equal to 10
{
ten = c/10;//as intergers cannot hold decimal points(12/10=1.2),for integer its‘1’
one = c-(ten*10);//ones place
}
PORTD |=(1<<PIND6); //turn ones place displaying display transistor ON
PORTA = DISPLAY1[one]; //put value at porta which is needed for corresponding digit display
_delay_ms(10); //wait for vision illusion
PORTD &=~(1<<PIND6); // turn ones place displaying display transistor OFF
PORTD |=(1<<PIND5); // turn tens place displaying display transistor ON
PORTA = DISPLAY1[ten]; //put value at porta which is needed for corresponding digit display
_delay_ms(10);
PORTD &=~(1<<PIND5);// turn tens place displaying display transistor OFF
}
}
