c programing of MCU Atmega8L

[angel.angel]

hi
My all dear friends.
I m dealing with programing of MCU atmega8l-8pu in c/c++ language first time. So Ii m facing a problem in the programing related to the breaking the continous while loop. I cannot. Here i m using four different sensor input to MCU as shown in the program below:

#define F_CPU 1000000UL  // 1 MHz
#include <inttypes.h>
#include <avr/io.h>
int main() // The main function
{
DDRD = 0b00000000;// Set all the pin of portD as input
DDRB = 0b11111111; // Set all the pin of portB as output
 
while(PIND==0b00001111) 
{
PORTB = 0b00000101; // both motor rotate Clock Wise
}
while (PIND==0b00001101)
{
PORTB = 0b00000100; // left motor stop and right motor rotate CW
}
while(PIND==0b00001100)
{
PORTB = 0b00000110; // left motor CW and right motor counter clock wise (CCW)
}
while (PIND==0b00001011)
{
PORTB = 0b00000001; // left motor CW and right motor stop
}
while (PIND==0b00000011)
{
PORTB = 0b00001001; // left motor CW and right motor CCW
}
}

Regarding this program written above. when one input value of while loop is true, it is giving the desired output. But during the working of the MCU at one while statement, if there is any change the input i.e. input of 2nd while statement the continous while loop is not breaking till the power suply is not off. If we off the Power suply, then it jumps the new statement.
to solve this problem I used the break statement. and the new programe written below:

#define F_CPU 1000000UL  // 1 MHz
#include <inttypes.h>
#include <avr/io.h>
int main() // The main function
{
DDRD = 0b00000000;// Set all the pin of portD as input
DDRB = 0b11111111; // Set all the pin of portB as output
 
while(PIND==0b00001111) 
{
PORTB = 0b00000101; // both motor rotate Clock Wise
if(PIND != 0b00001111)
break;
PORTB = 0b00000101;
}
while (PIND==0b00001101)
{
PORTB = 0b00000100; // left motor stop and right motor rotate CW
if(PIND != 0b00001101)
break;
PORTB = 0b00000100;
}
while(PIND==0b00001100)
{
PORTB = 0b00000110; // left motor CW and right motor counter clock wise (CCW)
if(PIND != 0b00001100)
break;
PORTB = 0b00000110;
}
while (PIND==0b00001011)
{
PORTB = 0b00000001; // left motor CW and right motor stop
if(PIND != 0b00001011)
break;
PORTB = 0b00000001;
}
while (PIND==0b00000011)
{
PORTB = 0b00001001; // left motor CW and right motor CCW
if(PIND != 0b00000011)
break;
PORTB = 0b00001001;
}
}

Now at this situation I m confused. I donnot know what to do right now.
So any one can help me one this topic that How to break the infinite loop of while statement to jump into another while loop with the change in input of the sensor.
Thanks in advance/.

 

[jayanth.devarayanadurga]

That is because you don't have a infinite while(1) loop. Please put all your while() loops inside another while(1) loop and your code will work.

 

[angel.angel]

Thanks for the information. But I didnot get it. Can u explain with small example. Thanks in advance

- - - Updated - - -

Hye thanks for the information
I got it. Now my program is working properly.
Thaks