Newer
Older
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
39
40
41
/*
* Copyright 2021 Daniel Friesel
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#ifndef COUNTER_H
#define COUNTER_H
#include <avr/io.h>
#include <avr/interrupt.h>
typedef uint16_t counter_value_t;
typedef uint8_t counter_overflow_t;
class Counter {
private:
Counter(const Counter ©);
public:
uint16_t value;
volatile uint8_t overflow;
Counter() : overflow(0) {}
inline void start() {
overflow = 0;
TCNT3 = 0;
TCCR3A = 0;
TCCR3B = _BV(CS10); // no prescaler
TIMSK3 = _BV(TOIE3);
}
inline void stop() {
TCCR3B = 0;
value = TCNT3;
}
};
extern Counter counter;
#endif