1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
/* this code is taken from examples/anacomp */
#include <avr/interrupt.h>
#include <avr/io.h>
volatile unsigned char in_loop = 0;
void init(void) {
// init port B: only port pin 1 to output
DDRB = 0x02;
// AIN0 is positive input
ACSR = 0;
// ADC disable and set ACME bit in ADCSRB or SFIOR
ADCSRA = 0;
#if defined(PROC_atmega16) || defined(PROC_atmega128) || defined(PROC_atmega8)
SFIOR = _BV(ACME);
#else
ADCSRB = _BV(ACME);
#endif
// set AIN1 to ADC1 input
ADMUX = 0x01;
}
int main(void) {
init();
do {
in_loop = 1;
if((ACSR & _BV(ACO)) == _BV(ACO)) {
PORTB = 0x02; // set output
} else {
PORTB = 0x00; // reset output
}
} while(1); // do forever
}
// EOF
|
