Re: Please Help...Programming Assitance Needed with Dragon12

I'm gonna have to agree with some of the previous comments...

You need to provide us with more information about what you need.  Based on the things you've said, I would assume the following:

1) You know how to probe temps from the thermistor (If you can display temps on an LCD at will, you can probe the temperature at will...)
2) You have a relay hooked up correctly to the system (You said you had it hooked to a PB2).
3) The relay can be used to turn the heating system on or off. (You didn't really say this, but what else would I assume based on what you said?)

If these 3 things are true, then the only advice I could give you is this...

1)  Don't forget to set DDRB = 0xFF (or 0x04) to ensure that PB2 is defined as an output.
2)  Review IF statements in C and learn to put design conditional statements in C.
3)  You will need to utilize code that will be nearly identical to..

if(temp<270){
     PORTB = PORTB|0x04;  //Sets PB2 high (flips the relay)
} else if(temp>280){
     PORTB = PORTB&0xFB;  //Sets PB2 low  (flips the relay)
}

Now, if those last three things helped you, great!  But, if those last three things helped you...then one of the following is true...

1)  You didn't attend class often enough (digital output and if statements are trivial and fundamental parts of programming micro controllers)
2)  You attended but did not pay attention in class. (for the same reasons as above).
3)  Your university offers the worst mechatronics course I've ever heard of (basically for the same reasons as above)

Giving you the benefit of the doubt, hopefully none of those are true.  Please define your problem a little more thoroughly for us...we really do want to help you.