ATtiny85 BOOST CONVERTER

1#define F_CPU 8000000
2int pwm = 1;
3int potinput = A2;
4int feedbackinput
5  = A3;
6int potinputval;
7int feedbackinputval;
8int pwmval;
9
10void setup()
11  {
12  TCCR0A = 2 << COM0A0 | 2 << COM0B0 | 3 << WGM00;
13  TCCR0B = 0 << WGM02
14  | 1 << CS00;
15  TCCR1 = 0 << PWM1A | 0 << COM1A0 | 1 << CS10;
16  GTCCR = 1 <<
17  PWM1B | 2 << COM1B0;
18  pinMode(pwm, OUTPUT);
19  pinMode(potinput, INPUT);
20
21  pinMode(feedbackinput, INPUT);
22  digitalWrite(pwm, LOW);
23  pwmval = 0;
24}
25
26void
27  loop() {
28  potinputval = analogRead(potinput);
29  potinputval = map(potinputval,
30  1023, 0, 255, 0);
31  feedbackinputval = analogRead(feedbackinput);
32  feedbackinputval
33  = map(feedbackinputval, 1023, 0, 255, 0);
34  while (potinputval > feedbackinputval)
35  {
36    if (pwmval == 230) {
37      potinputval = analogRead(potinput);
38      potinputval
39  = map(potinputval, 1023, 0, 255, 0);
40      feedbackinputval = analogRead(feedbackinput);
41
42      feedbackinputval = map(feedbackinputval, 1023, 0, 255, 0);
43    }
44    else
45  {
46      pwmval = pwmval + 1;
47      analogWrite(pwm, pwmval);
48      potinputval
49  = analogRead(potinput);
50      potinputval = map(potinputval, 1023, 0, 255, 0);
51
52      feedbackinputval = analogRead(feedbackinput);
53      feedbackinputval =
54  map(feedbackinputval, 1023, 0, 255, 0);
55    }
56  }
57  while (potinputval
58  < feedbackinputval) {
59    if (pwmval == 0) {
60      potinputval = analogRead(potinput);
61
62      potinputval = map(potinputval, 1023, 0, 255, 0);
63      feedbackinputval
64  = analogRead(feedbackinput);
65      feedbackinputval = map(feedbackinputval, 1023,
66  0, 255, 0);
67    }
68    else {
69      pwmval = pwmval - 1;
70      analogWrite(pwm,
71  pwmval);
72      potinputval = analogRead(potinput);
73      potinputval = map(potinputval,
74  1023, 0, 255, 0);
75      feedbackinputval = analogRead(feedbackinput);
76      feedbackinputval
77  = map(feedbackinputval, 1023, 0, 255, 0);
78    }
79  }
80}